Article
Chemistry, Physical
Y. T. Zhou, X. L. Jia, J. B. Li, G. G. Guan, X. L. Ma, J. S. Zhang
Summary: In this study, the oxide film heterogeneity induced by Mg(Zn,Cu)2 particles with different sizes in an Al-Zn-Mg-Cu alloy and its influence on the corrosion behavior were investigated using quasi in-situ transmission electron microscopy (TEM). It was found that small-sized precipitates were electrochemically inert, while the grown precipitates promoted pitting events of the nearby alloy matrix.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Hao-Chin Huang, Kai-Yuan Hsiao, Yu-Han Tseng, Yan-De Chen, Ming-Yen Lu
Summary: In this study, an in situ transmission electron microscopy (TEM) heating system was used to investigate the morphological changes of cubic Ag nanoparticles (NPs) and Ag-based core-shell structures induced by sublimation, as well as the influence of shell coverage on thermal stability. It was found that large Ag NPs (>50 nm) showed a three-stage sublimation-induced morphological change, while small Ag NPs (<30 nm) showed a uniform sublimation. The sublimation process of core-shell NPs started at stage II, and the thermal stability was enhanced by carbon shell passivation.
Article
Nanoscience & Nanotechnology
Baris Yavas, Cain J. Hung, Mingxuan Li, Rainer J. Hebert, S. Pamir Alpay, Mark Aindow
Summary: Laser glazing in a powder bed fusion instrument was used to evaluate the microstructure of an Al85Cu6Fe3Cr6 alloy, revealing the presence of I-phase quasicrystals, Al2Cu, and FCC Al. Laser tracks produced under different conditions showed a fine and uniform phase mixture with over 70% I-phase, a thin film of Al2Cu, and no cracking or macrosegregation. The reasons for the formation of I-phase instead of the previously reported D-phase in this alloy were discussed.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Namhyuk Seo, Junhyub Jeon, Sang-Hwa Lee, Kwangjun Euh, Su-Hyeon Kim, Tae-Young Ahn, Seung Bae Son, Seok-Jae Lee, Jae-Gil Jung
Summary: The microstructural evolution and precipitation behavior of a multicomponent Al83Zn5Cu5Mg5Li2 alloy were investigated using TEM and APT. The as-cast alloy consisted of V-Al5Cu6Mg2 and ri-Mg(Zn,Cu,Al) phases, which partially dissolved during solution treatment. Different cooling methods resulted in the formation of different precipitates. Natural aging induced the formation of solute clusters, contributing to the age-hardening of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Mingjun Yang, Kai Li, Haonan Chen, Jicheng Wang, Zhuo Zhang, Ning Yan, Qiang Lu, Xinyue Lan, Tong Yang, Ying Zhang, Gunan Li, Shuyan Zhang, Yong Du
Summary: This study investigated the corrosion process of MgSi nano-precipitates in an Al-Mg-Si alloy using transmission electron microscopy. It was found that coarsened beta' precipitates in the over-aged state were corroded through dissolution of Mg and oxidation of Si, transforming into amorphous SiO2 precipitates. This newly discovered crystalline-to-amorphous phase transformation plays a role in intragranular corrosion behavior, explaining the reduced susceptibility of over-aged Al-Mg-Si alloys to pitting and intergranular corrosion.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Abhinav Parakh, Andrew C. Lee, Stella Chariton, Melody M. Wang, Mehrdad T. Kiani, Vitali B. Prakapenka, X. Wendy Gu
Summary: Precipitate-matrix interactions govern the mechanical behavior of precipitate strengthened Al-based alloys. We studied the high-pressure behavior of Al7075 alloy separately from the high strain-rate behavior. High pressure can significantly enhance the strength of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Haneul Choi, Min Young Na, Indong Jun, Hojeong Jeon, Yu-Chan Kim, Jin-Woo Park, Hye Jung Chang
Summary: NiTi shape memory alloys (Nitinol) are valuable in medical fields due to their unique attributes, such as superelasticity, wear resistance, and biocompatibility. Laser treatment can enhance biocompatibility by precisely controlling surface characteristics. This study explored the effects of laser irradiation on NiTi alloy surfaces, specifically the number of scans and their impact on surface features. The findings highlight the importance of adjusting laser parameters to achieve tailored surface properties for medical applications.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
E. Thronsen, S. Shah, C. Hatzoglou, C. D. Marioara, S. Wenner, S. J. Andersen, B. Holmedal, R. Holmestad
Summary: The evolution of early-stage precipitates in a 7003 aluminium alloy was investigated through artificial ageing. It was found that after 10 minutes of artificial ageing, the hardness of the precipitates decreased and their size increased, indicating the dissolution of the Guinier-Preston (GP) zones. Subsequently, as the ageing time increased, the hardness gradually increased and new precipitate phases appeared. Atomically resolved scanning transmission electron microscopy images of the disputed T' phase were also presented.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, David N. Seidman, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The research revealed that the formation and evolution of GPI and GPII zones during natural aging had a significant impact on the mechanical properties of the Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti alloy. The Zn/Mg atomic ratio, mean radius, number density, and volume fraction of the GP zones also played crucial roles in influencing the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Coatings & Films
Nastaran Barati, Jiechao Jiang, Efstathios I. Meletis
Summary: In this study, alumina-zirconia nanocomposite coatings were prepared on a 7075 aluminum alloy using plasma electrolytic oxidation. The coatings consisted of gamma-, t- and alpha-alumina and tetragonal zirconia, and were composed of multiple sub-layers. The formation of alumina occurred in the early stages of the process, while the crystallization and incorporation of zirconia occurred in the later stages.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Hamed Roghani, Ehsan Borhani, Hamid Reza Jafarian, Mohammad Yousefieh, Majid Naseri, Ahmad Ostovari Moghadam
Summary: AA1050/AA2024 layered composites were created through six cycles of the ARB process, with the effect of using reinforcing nanoparticles and the initial aging process on the mechanical properties and microstructure being researched. Equiaxed ultra-fine grain microstructures with grains of about 500 nm in size were formed after six ARB cycles and using reinforcing particles. The addition of alumina nanoparticles resulted in significant improvements in the composite's wear resistance.
Article
Materials Science, Multidisciplinary
Sung Bo Lee, Seung Jo Yoo, Jinwook Jung, Heung Nam Han
Summary: This study used electron-beam irradiation to observe surface structural transitions on thin Au (1 0 0) and (1 1 0) specimens at different current densities. It was found that at low current densities, nanometer polygonal holes were formed with atomically sharp facets on both surfaces, while at higher current densities, the holes became filled and some facet surfaces were roughened.
Article
Nanoscience & Nanotechnology
Shipeng Shu, Anthony De Luca, David C. Dunand, David N. Seidman
Summary: Micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si alloys affect precipitate evolution and resulting strengths, providing solid-solution strengthening and improving ambient-temperature strength and elevated-temperature creep resistance. Mn-modified precipitates exhibit higher number density, while Mo-modified precipitates display improved coarsening-resistance. Both Mn and Mo additions enhance creep resistance at 300 degrees C, with Mn-bearing alloys showing a more significant effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
M. R. Gazizov, A. O. Boev, C. D. Marioara, S. J. Andersen, R. Holmestad, R. O. Kaibyshev, D. A. Aksyonov, V. S. Krasnikov
Summary: Research on the prevalent hardening phase forming in an Al-Cu-Mg-Ag alloy after peak-aging at 150 and 190 degrees C using transmission electron microscopy methods revealed a hybrid precipitate with plate morphology on {111} Al planes, consisting of orthorhombic and hexagonal structural fragments. Density functional theory calculations suggested that hybridization reduces structural incompatibility of the plates with the matrix, and the incorporation of Cu, Mg, and Ag in the structure reduces its formation enthalpy.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
B. D. S. Deeraj, Gejo George, N. R. Dhineshbabu, Suryasarathi Bose, Kuruvilla Joseph
Summary: This study focused on the preparation and characterization of zirconia incorporated PAN-based carbon nanofiber reinforced epoxy composites as effective EMI shielding materials. The results showed superior storage modulus and excellent EMI shielding effectiveness, especially stacking the ZrO2@CNF mats to achieve outstanding shielding effectiveness above -90 dB in the Ku band, which is significant for industrial, radar, and military applications.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Multidisciplinary
Li Liu, Jian-Tang Jiang, Xiang-Yuan Cui, Bo Zhang, Liang Zhen, Simon P. Ringer
Summary: The study investigates the correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions during isothermal ageing. Results show that Er additions significantly improve hardness by increasing the nucleation rate of Al-3(Er,Sc,Zr) precipitates, leading to a higher density of fine nanoparticles. First-principles calculations demonstrate energetically favored solute-solute interactions, rationalizing the observed precipitate structure and formation mechanism.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Cheng-Yi Zhu, Jing-Kai Qin, Pei-Yu Huang, Hai-Lin Sun, Nie-Feng Sun, Yan-Lei Shi, Liang Zhen, Cheng-Yan Xu
Summary: This study demonstrates a successful method to obtain air-stable ultrathin indium phosphorus sulfide (In2P3S9) nanosheets with excellent insulating properties, suitable for integration into MoS2 FETs to improve electrical performance. This approach paves the way for further research on 2D materials for functional electronics.
Article
Materials Science, Multidisciplinary
Wei-Jian Li, Zi-Yao Chen, Hao Jiang, Xiao-Han Sui, Cong-Fei Zhao, Liang Zhen, Wen-Zhu Shao
Summary: Interface wettability plays a vital role in the electrical contact characteristics of oxides/Cu-based composites. In this study, Zn2SnO4/Cu electrical contacts were designed to improve the poor wettability of SnO2/Cu composites. It was found that Zn2SnO4 significantly improved the arc resistance of Cu-based electrical contacts due to its excellent interface wettability. The bonding mechanism of oxide/Cu interfaces was investigated, and it was revealed that strong polar covalent bonds across the Zn2SnO4/Cu interface enhanced the interfacial adhesion strength and improved the arc resistance. This work provides insights for the rational design of ternary oxide/Cu-based electrical contact materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Mengtian Zhang, Hao Li, Junxiang Chen, Fei-Xiang Ma, Liang Zhen, Zhenhai Wen, Cheng-Yan Xu
Summary: In this study, highly active single-atom catalysts (SACs) for oxygen reduction reaction (ORR) were explored using density functional theory (DFT) calculations and experimental synthesis. Co SACs showed the best ORR activity, comparable to platinum catalysts. X-ray absorption fine structure (XAFS) spectra confirmed that atomically dispersed Co-N-4 sites were the active sites. Additionally, the catalyst exhibited outstanding performance in a zinc-air battery.
Article
Nanoscience & Nanotechnology
Zi-Yao Chen, Wen-Zhu Shao, Wei-Jian Li, Xue-Yin Sun, Liang Zhen, Yang Li
Summary: This study demonstrates that doping with lower electronegativity metallic ions is an effective strategy to suppress the agglomeration of ZnO nanoparticles. Aluminum, lithium, and copper ions can reduce the adsorbed amount of hydroxyl groups on the ZnO surface and decrease the aggregate size of the nanoparticles.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jin-Kui Meng, Li Liu, Jian-Tang Jiang, Guo Huang, Liang Zhen
Summary: The fracture behaviors and mechanisms of metallic materials under biaxial stress were investigated. It was found that under quasi-uniaxial tension, normal fracture occurred, while under equi-biaxial tension, both normal and secondary shear fractures were observed. The lower strain hardening ability in the rolling direction introduced large shear stress in the 45 degrees direction, contributing significantly to the secondary shear fracture. An anisotropy parameter K was proposed for the first time to predict the fracture path.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yao Lu, Li Liu, Jinkui Meng, Zhe Chen, Liang Zhen
Summary: This study proposes a new industry-friendly approach to develop lightweight yet high-performance medium Mn steel through partial austenitization. The medium Mn steel with partial austenitization exhibits a refined microstructure, particularly with heterogeneous microstructure of retained austenite in different sizes and morphologies. This multi-scale austenite enables a sustainable TRIP effect during deformation, achieving a superior strength-ductility combination up to 60 GPa.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Mengtian Zhang, Hao Li, Junxiang Chen, Fei-Xiang Ma, Liang Zhen, Zhenhai Wen, Cheng-Yan Xu
Summary: In this study, a self-sacrificing template strategy was developed to fabricate high metal loading cobalt single atoms and atomic clusters on nitrogen-doped graphene. The resulting catalyst exhibited enhanced electrocatalytic activity for oxygen reduction reaction, outperforming Pt/C catalysts. It also showed excellent performance in zinc-air batteries, indicating great potential for energy storage applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiaoya Wang, Guoai Li, Qiyao He, Jiantang Jiang, Dongfeng Li, Wenzhu Shao, Liang Zhen
Summary: The intergranular corrosion in a partially recrystallized 2A97 Al-Cu-Li alloy at different tempers was investigated. It was found that the T6-tempered alloy was susceptible to intergranular and intersubgranular corrosion, while the T8-tempered alloy showed reduced sensitivity to IGC and ISGC. In the T8-tempered alloy, intragranular pitting was the dominant corrosion mechanism. The distribution of precipitates and solutes at grain and subgrain boundaries were analyzed using TEM, STEM-EDX, and APT to understand the key factors influencing localized corrosion.
Article
Nanoscience & Nanotechnology
Jin-Kui Meng, Li Liu, Jian-Tang Jiang, Xing-Qi Liao, Xiang-Guang Chen, Liang Zhen
Summary: The mechanical behavior of commercially pure Ti under biaxial stress conditions has been investigated. It was found that prismatic slip was suppressed while pyramidal slip was promoted under high biaxial stress. The occurrence of extension twinning was also encouraged by the increased stress component in the c-axis direction. Deformation resistance and work hardening rate increased with increasing biaxiality.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Zheng-Qi Liu, Xiongyi Liang, Fei-Xiang Ma, Yu-Xuan Xiong, Guobin Zhang, Guanhua Chen, Liang Zhen, Cheng-Yan Xu
Summary: By introducing NiFe-LDH nanodots on the single-atom Fe-N-C catalyst, NiFe-LDH/Fe-1-N-C heterostructure hollow nanorods were formed, which exhibit enhanced activity for oxygen reduction and evolution reactions (ORR/OER) and achieve efficient bifunctional ORR/OER activity. This catalyst not only shows excellent ORR activity but also demonstrates impressive bifunctional performance, indicating its potential as an alternative to precious metal catalysts and its significance for practical applications in rechargeable Zn-air batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yange Yu, Wenzhu Shao, Yue Liu, Yang Li, Jing Zhong, Huijian Ye, Liang Zhen
Summary: The superior energy storage performance of PVDF-based nanocomposites, such as discharged energy density or efficiency, is reported. This leads to a lower volume, lightweight system, or high reliability for film capacitors. The study introduces core-shell structured BaTiO3@rGO nanoparticles into the PVDF matrix to enhance both discharged energy density and energy storage efficiency, optimizing the charge transfer path and improving the overall performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Yuanyuan Zhang, Xueyin Sun, Yong Yuan, Wenzhu Shao, Liang Zhen, Jiantang Jiang
Summary: Fe/Fe3O4 composite particles with mesoporous silica (mSiO2) shells were prepared via solvothermal reaction combined with hydrogen-thermal reduction. The addition of mSiO2 created a well-ventilated framework that maintained the dispersion of fine Fe particles. The conversion of Fe3O4 to Fe nanoparticles enhanced the ferromagnetic loss, while the interface of Fe3O4/Fe/mSiO2 induced an intensified dielectric loss. The Fe/Fe3O4@mSiO2 showed excellent electromagnetic wave-absorbing performances as fillers for electromagnetic absorption materials.
ACS APPLIED NANO MATERIALS
(2023)
Article
Electrochemistry
Qiyao He, Jiantang Jiang, Xiaoya Wang, Junzhou Chen, Wenzhu Shao, Liang Zhen
Summary: The intergranular corrosion of 2024-T3 aluminum alloy, related to hydrogen permeation, was investigated in this study. Atom probe tomography was used to observe the precise position of hydrogen atoms in relation to grain boundaries. The study found that the distribution of hydrogen is highly related to the S-phase at grain boundaries and hydrogen pre-charging significantly improves the charge transfer efficiency at the initial stage of intergranular corrosion process.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Fei-Xiang Ma, Zheng-Qi Liu, Guobin Zhang, Hong-Shuang Fan, Yue Du, Liang Zhen, Cheng-Yan Xu
Summary: A self-sacrificing template strategy is developed to fabricate single-atom Fe-N-C hollow microspheres with ultrathin nanosheets, which exhibit high oxygen reduction reaction (ORR) performance and stability. When used as air-cathode catalysts, they show significantly higher power density and discharge capacity compared to commercial Pt/C.
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)
