Article
Chemistry, Physical
Chengtao Yu, Yu Zhen, Jing Zhao, Qunchang Wang, Jinlong Wang, Minghui Chen, Fuhui Wang
Summary: A Ni-based superalloy composite (FTSC) was successfully prepared by spark plasma sintering with Ti3SiC2 (15 vol %) and FGH97 alloy powders as precursors. During sintering, the weakly bonded Si layers de-intercalate from Ti3SiC2 and the remaining TiC is eroded by the elements of the matrix, which promoted in-situ precipitation of MC and M6C carbides. The Zener pinning effect of ultra-fine duplex carbides results in refinement of alloy grains and notably improvement in mechanical strength. Comparing to the alloy FGH97, the composite FTSC possesses 55% higher microhardness, 100% higher compressive yield strength and 92% higher flexural strength. The refined grains ensured fast formation of a protective alumina scale at surface, which provides high oxidation resistance for the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Guangfa Huang, Jiheng Wang, Qian Wang, Yuting Lv, Yuanfei Han, Weijie Lu
Summary: In this study, (TiB + TiC)/Ti6Al4V composites (TMCs) were prepared using in situ synthesis technology and hot indirect extrusion was conducted at four different temperatures. It was found that below the phase transition temperature, mechanical effects significantly influenced the microstructures of TMCs, leading to the formation of more elongated α grains. The yield strength decreased gradually with increasing extrusion temperature, while elongation initially increased and then decreased slightly.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Tomila M. Vidyuk, Dina Dudina, Michail A. Korchagin, Alexander Gavrilov, Arina Ukhina, Uliana E. Bulanova, Mikhail A. Legan, Aleksey N. Novoselov, Maksim A. Esikov, Alexander G. Anisimov
Summary: This article presents the features of in-situ synthesis, microstructure evolution, and mechanical properties of TiC-Cu composites obtained by mechanical milling and spark plasma sintering (SPS). Different carbon sources were compared for their influence on the composite mixtures, with the conclusion that carbon black and nanodiamonds facilitate faster conversion of reactants compared to graphite. The TiC-Cu composite obtained showed a relative density of 95%, impressive strength and hardness properties, and an unconventional microstructure.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Chao Ding, Zhouguang Lu, Shukui Li, Ziming Wang, Peng Yu, Shulong Ye
Summary: In this work, a novel Al-Si-CNT composite material is fabricated by ball milling and hot extrusion, and its microstructures, thermal properties and mechanical properties are studied. The addition of CNTs in the Al20Si matrix leads to thermal stability and resistance to structural coarsening. The composite with 2 wt% CNT content exhibits the best properties, including high tensile yield strength, low thermal expansion coefficient, and acceptable thermal conductivity. This study provides inspiration for designing high-performance thermal management materials using hybrid reinforcements Si and CNTs.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Mingcheng Zhu, Lan Zhang, Na Li, Desen Cheng, Jidong Zhang, Shiyao Yu, Hui Bai, Huizhong Ma
Summary: In this study, ternary ZrB2-SiC-MoSi2 composites with different compositions were successfully fabricated by reactive spark plasma sintering. The densification behavior, microstructures, and mechanical properties were investigated. It was found that the addition of MoSi2 could improve the relative density, hardness, and fracture toughness of the composites, and a core-shell structure could be formed to enhance the overall performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Soban Muddassir Dar, Yutao Zhao, Xizhou Kai, Zhuangzhuang Xu
Summary: This study investigated the microstructures, mechanical properties, and strain hardening properties of 1 vol% and 2 vol% (Al3Zr/Al2O3 + ZrB2) nanoparticles reinforced 6016Al matrix composites, which were synthesized through in-situ chemical reaction and solidified under squeezing pressure. It was found that Fe-B-rich and AlB2 phase particles were also formed in addition to the reinforcement particles. The matrix of the 1 vol%-6016Al composite exhibited fine Mg2Si precipitates under high squeezing pressure, while the matrix of the 2 vol%-6016Al composite did not show such precipitates. The squeezed 1 vol%-6016Al composite also had a greater reduction in grain size compared to the squeezed 2 vol%-6016Al composite. The squeezed 6016Al matrix composites exhibited high strength, high ductility, and lower strain hardening effect in the aged state, which was different from monolithic 6016Al alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Lipeng Gao, Guirong Li, Hongming Wang, Yuwei Yan
Summary: In this study, FeCoNi1.5CrCu/Al composites with excellent mechanical properties were successfully prepared using microwave sintering technology. It was found that the material maintained a fine and uniform microstructure during microwave heating. The mechanism of interface formation revealed the presence of an atomic diffusion layer with a BCC solid solution structure between the high entropy alloy particles and the matrix, which significantly enhanced the interfacial bonding performance.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Yifeng Xiong, Faming Zhang, Yinuo Huang, Caiyun Shang, Qifa Wan
Summary: This study investigates the strong interface bonding of particle reinforced metal matrix composites using high entropy alloy (HEA) addition. The results show that the addition of HEAs enhances the yield strength and hardness values of the composites, achieving strengthening through multiple mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Metallurgy & Metallurgical Engineering
Hong Yang, Xianhua Chen, Guangsheng Huang, Jiangfeng Song, Jia She, Jun Tan, Kaihong Zheng, Yiming Jin, Bin Jiang, Fusheng Pan
Summary: Magnesium matrix composites (MMCs) have shown promising mechanical properties at both room and elevated temperatures. The commonly used ceramic particle reinforcements often improve the yield and ultimate stresses but sacrifice ductility. Titanium (Ti) has been introduced as an alternative reinforcement due to its high melting point, high Young's modulus, high plasticity, low mutual solubility with Mg matrix, and similar thermal expansion coefficient. However, challenges remain in achieving Ti's homogeneity, high recovery rate, and optimizing the interfacial bonding strength between Mg and Ti in MMCs. This review focuses on the microstructural characteristics, mechanical properties, and fabrication techniques of Ti-reinforced MMCs, comparing and discussing the influencing factors that govern the strengthening mechanisms.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Ceramics
Bo Wang, Delong Cai, Haoyi Wang, Wenhua Zou, Zhihua Yang, Xiaoming Duan, Peigang He, Daxin Li, Wenjiu Duan, Dechang Jia, Hua-Tay Lin, Chao Zhao, Yu Zhou
Summary: Boron carbide (B4C) ceramic composites with excellent mechanical properties were fabricated using B4C, silicon carbide (SiC), titanium boride (TiB2), and magnesium aluminum silicate (MAS) as raw materials. The influences of SiC and TiB2 content on the microstructural evolution and mechanical properties of the composites were investigated. MAS in the composites effectively removes oxide layers from ceramic particles during high temperature sintering. The toughening mechanism of the composites is mainly attributed to crack deflection along the grain boundary caused by thermal expansion mismatch between B4C and TiB2.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Jiahua Zhu, Yuanfei Cai, Yan Zhang, Xiaodi Liu, Jinseng Tian, Jiang Ma, Jun Shen
Summary: The FeSiB-rich particle-reinforced Cu metal matrix composites were successfully fabricated using the spark plasma sintering technique. The composites showed significantly enhanced strength without sacrificing ductility, which was mainly attributed to the homogeneously distributed reinforcements and high interfacial strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Qiang-qiang Nie, Guo-hong Chen, Bing Wang, Lei Yang, Wen-ming Tang
Summary: The study found that increasing Cu content led to higher density, thermal conductivity, and coefficient of thermal expansion in the composites, but reduced tensile strength; higher sintering temperature enhanced Cu/Invar interface diffusion, decreasing thermal conductivity but improving tensile strength; compaction pressure had a comprehensive effect on the thermal properties of the composites.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Engineering, Multidisciplinary
T. Chen, W. S. Cai, Z. Liu, H. W. Ma, S. G. Qu, W. W. Zhang, C. Yang
Summary: This study establishes a methodology for in-situ dual-deoxidation to fabricate advanced titanium matrix composites using pressureless sintering. By utilizing this method, advanced TMCs with in-situ La2O3 particle and TiB whisker are successfully produced, exhibiting advantages such as reduced oxygen content, refined grains, and avoidance of pores. These advanced TMCs overcome the strength-ductility trade-off issue.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Physical
Qiangqiang Nie, Guohong Chen, Bing Wang, Lei Yang, Jianhua Zhang, Wenming Tang
Summary: Cu/Invar bi-metal matrix composites show great potential as novel electronic packaging materials. The size of Invar particles affects the microstructures and properties of the composites, with finer Invar particles leading to finer Cu grain sizes and improved thermal conductivity. Sintering temperature also plays a critical role in determining the properties of the composites, with 700 degrees Celsius sintered composites exhibiting the highest thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Adrian Grabos, Pawel Rutkowski, Jan Huebner, Pawel Nieroda, Dariusz Kata, Shigenari Hayashi
Summary: The thermal properties of Inconel 625-NbC metal matrix composite were investigated, and it was found that the addition of NbC did not significantly affect the coefficient of thermal expansion and thermal conductivity of the composite. Furthermore, the specific heat of the composite was influenced by the Spark Plasma Sintering process and hot rolling.
MATERIALS & DESIGN
(2022)
Article
Engineering, Electrical & Electronic
Pandiyarasan Veluswamy, Saravanan Subramanian, Muhmood ul Hassan, Cafer T. Yavuz, Ho Jin Ryu, Byung Jin Cho
Summary: The wet ball-milling method was used to fabricate high-performance two-dimensional TiS2 nanoplatelets for thermoelectric applications. Addition of sulfur powder during annealing prevented sulfur deficiency, resulting in near-stoichiometric TiS2 composition. The prepared TiS2 exhibited a high figure of merit of 0.35 at 100 degrees C, showcasing potential for scaled-up device fabrication.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Daeho Yun, Hobyung Chae, Taegyu Lee, Dong-Hyun Lee, Ho Jin Ryu, Rajarshi Banerjee, Stefanus Harjo, Takuro Kawasaki, Soo Yeol Lee
Summary: In this study, the deformation behavior and strengthening contribution of the FCC phase and B2 phase in Al0.7CoCrFeNi eutectic high entropy alloys were investigated. It was found that the FCC phase exhibited slip-dominant deformation, while the stress contribution of the B2 phase significantly increased with an increase in plastic strain, becoming the predominant factor in tensile deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Nayoung Kim, Wonseok Yang, James Amphlett, Dokyu Kang, Yunu Lee, Jae Joon Kim, Ho Jin Ryu, Sungyeol Choi
Summary: The study found that deep eutectic solvents formed from choline chloride and p-toluenesulfonic acid monohydrate have excellent decontamination capabilities under different conditions, with hydration and agitation showing the best results. These solvents, which are biodegradable and eco-friendly, can significantly reduce the cost of decontamination applications and have the potential for metal recovery.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
SeungHyeok Chung, Ji Ho Shin, Ho Jin Ryu
Summary: This study investigates the dispersoid formation and microstructural evolution in an oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy through a newly designed multistep sintering process. It is found that the multistep sintering process leads to the formation of finer FCC Y2O3 dispersoids and a refined grain structure, compared to the conventional single-step sintering.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nuclear Science & Technology
Inhye Hahm, Daehyun Kim, Ho Jin Ryu, Sungyeol Choi
Summary: This study compares different decontamination techniques for the steam generator and determines that chemical oxidizing reduction decontamination and decontamination grit blasting are the preferred methods. The evaluation method can be applied not only to process comparison but also to process scenario creation.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Review
Materials Science, Multidisciplinary
Sung Chan Yoo, Dongju Lee, Seong Woo Ryu, Byungchul Kang, Ho Jin Ryu, Soon Hyung Hong
Summary: Low-dimensional nanomaterial fillers are effective in improving the performance of metal matrix nanocomposites. The microstructures and interfaces of the nanocomposites can be tailored through various fabrication processes, leading to improved mechanical and functional properties. Multi-functional nanocomposites have shown great potential in meeting the demands of different application areas.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Composites
Dalhyeon Ryu, SeungHyeok Chung, Taegyu Lee, Ho Jin Ryu
Summary: Mg and its alloys are lightweight materials with high specific strength. In this study, a double-powder mixing process called SMART/MA is developed to inhibit the agglomeration of graphene nanoplates (GNPs) in an Mg alloy. The resulting AZ91-based composite shows improved mechanical properties and corrosion resistance due to the few layers of GNPs evenly dispersed throughout the matrix.
ADVANCED COMPOSITE MATERIALS
(2023)
Article
Chemistry, Physical
Taegyu Lee, Wonjong Jeong, SeungHyeok Chung, Kang Pyo So, Ho Jin Ryu
Summary: This study developed an innovative metal powder fabrication process called surface modification and reinforcement transplantation (SMART), which efficiently produces surface-modified feedstock powders for additive manufacturing of new alloys and composites. The working principles of the SMART process were established, and practical applications were considered by fabricating specialized feedstocks such as carbon nanotube-coated, Mo alloyed, and TiC particle-reinforced powders. The performance of the SMART powder was validated through the directed energy deposition process, and it was compared with existing processes to confirm its advantages.
APPLIED SURFACE SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Young-Bum Chun, SeungHyeok Chung, Chang-Kyu Rhee, Ho Jin Ryu
Summary: This work introduces a new neutron absorber, Cu-B composites, which possess excellent thermal conductivity and effective neutron absorbing capability. The consolidation of mixtures of Cu and B powders with varying B contents into round bars by hot extrusion resulted in refined grain structures and enhanced hardness. The thermal conductivity of Cu-B composites, approximately twice that of Al-B4C MMC, decreases with increasing B contents due to higher volume fraction B particles with lower thermal conductivity and texture randomisation.
Article
Engineering, Manufacturing
Taegyu Lee, Wonjong Jeong, SeungHyeok Chung, Jae Joon Kim, Donghyun Lee, Junghwan Kim, Ho Jin Ryu
Summary: In this study, the stable metal additive manufacturing (MAM) behavior of aluminum matrix composites was achieved by adding B4C reinforcement to the feedstock powder in the form of a novel core-shell powder. The addition of B4C effectively mitigated the formation of cracks, pores, and balling during directed energy deposition (DED), while refining the grains and improving mechanical properties. The favorable effect of B4C addition during DED was found to be caused by the formation of AlB2 during solidification.
ADDITIVE MANUFACTURING
(2023)
Article
Nanoscience & Nanotechnology
Tien-Shee Chee, Sujeong Lee, Woei Jer Ng, Muhammad Akmal, Ho Jin Ryu
Summary: In this study, a novel bismuth-based reduced graphene oxide (Bi-0-rGO) composite was proposed for immobilizing off-gas radioactive iodine. The synthesized material showed a low surface area and a high iodine sorption capacity. The utilized methodology successfully reduced the iodine leaching rate and demonstrated the high potential of Bi-0-rGO as an innovative solution for radioactive waste immobilization at relatively low temperatures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Sujeong Lee, Yong-il Kim, Muhammad Akmal, Ho Jin Ryu
Summary: This study investigates the effects of cold sintering on the properties of zeolites. Cold sintering achieved greater densification but caused loss of the original nanoporous structure. Introducing liquid agents during the process improved the densification and reduced degradation, with H2O as the most suitable agent for maintaining the nanoporous properties and structural integrity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Physical
Abid Hussain, R. S. Dhaka, Ho Jin Ryu, Saurabh Kumar Sharma, Pawan Kumar Kulriya
Summary: This article reviews the recent development in the understanding of design parameters, mechanical properties, and radiation stability-based classification of single-phase high entropy alloys (HEAs). HEAs are proposed as potential candidates for structural materials in generation-IV nuclear reactors due to their excellent radiation tolerance. Theoretical calculations and experimental studies show that phase stability and elemental distribution in solid solution depend on various factors. Heavy ion irradiation investigations confirm the importance of alloy composition, chemical nature, and size of alloying elements in determining the response to irradiation. The article also discusses the effects of irradiation temperature, alloy types, and microstructure on phase stability, radiation-induced segregation, and bubble formation in HEAs. Finally, the improvement in structural stability in high-temperature radiation environments and the applicability of HEAs as structural materials in nuclear reactor systems are reviewed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Taegyu Lee, Wonjong Jeong, SeungHyeok Chung, Ho Jin Ryu
Summary: The attractive flexible product shape of additive manufacturing (AM) is limited by a lack of material property diversity. To overcome this limitation, the AM of metal matrix composites (MMCs) is a suitable solution, as the properties of MMC can be tailored using various reinforcements. This study introduces a core-shell composite powder synthesized through the SMART process, which enables the fabrication of MMCs with enhanced strength and fewer defects compared to conventional AM approaches. The results of this study may accelerate the application of MMCs fabricated by AM, offering superior properties and reliability compared to casting and powder metallurgy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Hyun Woo Seong, Min Seok Lee, Ho Jin Ryu
Summary: In this study, the synthesizability of high-entropy MXenes was determined through first-principles calculations. It was found that high-entropy MXenes can be easily synthesized from few-layered and Al-based HE-MAX phases. The thermodynamic stability and exfoliation possibility of high-entropy MAX phases are closely correlated with lattice distortion factors and the differences in bond lengths. Out of 756 high-entropy MAX phase candidates, 146 high-entropy MXene compositions were estimated to be synthesizable. Furthermore, two novel high-entropy MXenes, (TiVNbTa)(2)C and (TiVNbHfTa)(2)C, were successfully synthesized based on the first-principles calculations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Tongyu Han, Haifeng Shi, Yigang Chen
Summary: In this study, a novel S-scheme system was built by combining CuO with BiVO4 to activate PMS for antibiotic degradation. The system exhibited excellent visible light absorption performance and remarkable charge separation ability, suggesting its potential application in enhancing PMS activation and purifying antibiotics in water.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Linlin Zhou, Tao Yang, Chunyu Guo, Kang Wang, Enhui Wang, Laipan Zhu, Hailong Wang, Sheng Cao, Kuo-Chih Chou, Xinmei Hou
Summary: Piezoelectric silicon carbide (SiC) has been considered for various applications due to its superior properties. However, its brittleness and unsatisfactory piezoelectric response have limited its use. In this study, PVDF/6H-SiC composite fiber films were fabricated and used for assembling high-performance energy harvesters and sensors. The results showed significant improvements in piezoelectric response and sensitivity compared to pure PVDF films. First-principles calculation and finite element analysis confirmed the effect of SiC nanoparticles on the composite film.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Y. F. An, X. P. Chen, L. Mei, P. Ren, D. Wei, W. Q. Cao
Summary: This study systematically investigates the precipitation sequence of Fe-28Mn-11Al-1C-5Ni austenitic low-density steel and its influence on mechanical properties. The results reveal the transformation pathway of kappa' -carbides and B2 particles under different aging conditions. This research is meaningful for guiding the design of new generation dual-nano precipitation austenitic lightweight steel.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Lei Yang, Tingkai Zhao, Abdul Jalil, Huijun Luo, Tao Jiang, Yuan Shu, Yazhou Yin, Weiyu Jia
Summary: In this study, a strategy utilizing oxygen vacancy concentration modulation was used to successfully grow semiconducting single-walled carbon nanotubes (s-SWCNTs) with narrow diameters. The Fe0.01Mg0.99O/CeO2(3) catalyst was employed to provide oxygen vacancies, allowing for selective etching of chemically active carbon nanotube caps during the growth process. The optimized conditions resulted in high purity s-SWCNTs with uniform diameters.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Letter
Materials Science, Multidisciplinary
Lingjun Xu, Pruch Kijkla, Sith Kumseranee, Suchada Punpruk, Tingyue Gu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
X. P. Hu, Y. H. Zhang, C. B. Liu, H. Z. Cui
Summary: In this study, a novel polyaniline (PANI) nanosheet with barrier and passivation functions was synthesized, and its interaction with polymeric resin was enhanced by polydopamine (PDA) wrapping. The composite coating with incorporated PANI@PDA nanosheets showed improved corrosion resistance by providing a longer penetration path and inducing the formation of a passivation film on the metal substrate.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Yan Zhang, Xuehua Liu, Zhiqiang Guo, Chenyu Jia, Feng Lu, Zirui Jia, Guanglei Wu
Summary: In this study, a self-assembling-etching-anchoring growth method was proposed to prepare MXene@Co electromagnetic wave absorbing materials. The hollow structure design and surface anchored growth of magnetic Co particles significantly enhanced the wave absorption performance of the absorber.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Yajing Ren, Yunfeng Li, Guixu Pan, Ning Wang, Yan Xing, Zhenyi Zhang
Summary: Photocatalytic technology utilizing sunlight as a driving force can convert solar energy into other energy sources for storage and use. CdS, as a typical reducing semiconductor, has attracted attention in photocatalysis due to its suitable bandgap and strong reducing ability. However, the photocatalytic performance of CdS is limited by carrier recombination and photocorrosion. Therefore, CdS has been widely developed as a reducing photocatalyst in constructing S-scheme heterojunctions to overcome these limitations.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Diao-Feng Li, Chun-Guang Bai, Zhi-Qiang Zhang, Hui-Bo Zhang, Nan Li, Jian Zhao
Summary: A novel compliant spinal fixation based on compliant mechanisms is designed to effectively reduce stress-shielding effect and adjacent segment degeneration (ASD), but it requires high properties of the used materials. Bulk metallic glasses (BMGs), as young biomaterials, demonstrate excellent comprehensive properties, making them attractive for compliant spinal fixation. In this study, the large deflection deformation behaviors of Zr61Ti2Cu25Al12 (at.%, ZT1) BMG beam were systematically investigated, including elastic, yielding, and plastic deformations. The theoretical nonlinear analytical solution curve predicts the load-deflection relation within the elastic deformation regime and assists in capturing the yielding event, serving as a powerful design tool for engineers. To accurately capture the beginning of the yielding event in biomedical implant applications, the concept of bending proof strength (sigma p,0.05%) with tiny permanent strain of 0.05% was proposed and determined, which is significant for setting the allowable operating limits of the basic flexible elements. The plastic deformation driven by the bending moment can be classified into two stages: the initial stage characterized by nucleation and intense interaction of shear bands, and the second stage dominated by the progressive propagation of shear bands and emergence of shear offsets. The plasticity of BMG beam structures depends on the BMG's inherent plastic zone size (rp), and when the half beam thickness is less than that of rp, the plastic deformation of BMGs behaves in a stable manner, effectively serving as the margin of safety.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Yanlin Li, Zhu Ma, Shanyue Hou, Qianyu Liu, Guangyuan Yan, Xiaoshan Li, Tangjie Yu, Zhuowei Du, Junbo Yang, Yi Chen, Wei You, Qiang Yang, Yan Xiang, Shufang Tang, Xuelin Yue, Meng Zhang, Wenfeng Zhang, Jian Yu, Yuelong Huang, Jiale Xie, Chun Tang, Yaohua Mai, Kuan Sun
Summary: This paper provides an overview of hydrogen progress from solar energy to solar cells, with a focus on photovoltaic-electrolysis and photoelectrochemical/photovoltaic systems. Both systems have achieved a solar-to-hydrogen efficiency of over 10% and show great potential for large-scale application. The challenges and opportunities in this field, including configuration design, electrode materials, and performance evaluation, are summarized. The paper also analyzes and presents perspectives on the potential commercial application and further scientific research for the development of solar-to-hydrogen.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
L. K. Huang, F. Liu, M. X. Huang
Summary: The bainite transformation in medium Mn steels has been experimentally and theoretically studied, and it has been found that the transformation kinetics is slow. However, the introduction of dislocations can significantly accelerate the transformation rate. A new "carbon depletion mechanism" is proposed to explain the role of dislocations in the acceleration of bainite transformation, and a physical model is developed to quantitatively understand the kinetics of bainite transformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Jing Qiao, Lutong Li, Jiurong Liu, Na Wu, Wei Liu, Fan Wu, Zhihui Zeng
Summary: Rare earth plays a crucial role in electromagnetic wave absorption materials, and the strategies of doping rare earth elements and constructing rare earth oxide composites are important for the fabrication of high-efficiency electromagnetic wave absorption materials. This review provides a comprehensive summary of the research background, classification, features, progress, and future development of rare earth electromagnetic wave absorption materials, offering guidance for future development.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Yao Gu, Zhongzheng Yao, Sinan Liu, Huiqiang Ying, Chenyu Lu, Zhenduo Wu, Yang Ren, Jun-ichi Suzuki, Zhenhua Xie, Yubin Ke, Jianrong Zeng, He Zhu, Song Tang, Xun-Li Wang, Si Lan
Summary: Fe-based metallic glasses are promising materials in the fields of advanced magnetism and sensors. This study proposes a novel approach to tailor the amorphous structure through liquid-liquid phase transition, and provides insights into the correlation between structural disorder and magnetic order. The results show that the liquid-liquid phase transition can induce more locally ordered nanodomains, leading to stronger exchange interactions and increased saturation magnetization. The increased local heterogeneity also enhances magnetic anisotropy, resulting in a better stress-impedance effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Hao Yu, Xin Kou, Xueqing Zuo, Ding Xi, Haijun Guan, Pengfei Yin, Lijia Xu, Yongpeng Zhao
Summary: Metal-organic frameworks derived composites are promising EMW absorbers. Cation substitution can improve their absorption performance by regulating morphology and atomic space occupation. However, the mechanisms of how cation substitution affects EMW absorption performance are still not well understood. In this study, imidazolic MOFs were fabricated and tailored by cation substitution strategy to prepare porous composites. The samples showed optimal reflection loss and effective absorption bandwidth values under low filling rate and thin thickness conditions. The intercoupling between multiple atoms and the porous structure introduced by cation substitution contribute to the improved absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Lina Wang, Peiyi Yan, Huairui Chen, Zhuo Li, Shu Jin, Xiaoxiang Xu, Jun Qian
Summary: The narrow bandgap semiconductor MgIn2S4 has been grown onto In2O3 nanofibers using an in situ growing method. The resulting MgIn2S4-In2O3 hybrid nanofibers exhibit strong visible light absorption and intimate MgIn2S4/In2O3 heterointerfaces, leading to highly efficient photocatalytic disinfection of Escherichia coli.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
