Article
Chemistry, Physical
Yang Liu, Qingdong Zeng, Changjiang Nie, Huaqing Yu
Summary: F, Mg and Ga co-doped ZnO (FMGZO) films were deposited on glass substrates at room temperature using magnetron sputtering. The effects of RF sputtering power on the structure, morphology, composition, electrical and optical properties of the films were investigated. The results showed that the FMGZO film deposited at an RF sputtering power of 15 W exhibited excellent electrical and optical performance, surpassing previously reported co-doped ZnO films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Micha Mazur, Damian Wojcieszak, Artur Wiatrowski, Danuta Kaczmarek, Aneta Lubanska, Jaros law Domaradzki, Piotr Mazur, Ma lgorzata Kalisz
Summary: This paper analyzed the properties of tungsten oxide thin films prepared using the magnetron sputtering method. Changes in the Ar:O-2 gas mixture ratios were found to influence the structural, optical, and electrical properties of the deposited coatings significantly. The results suggest that controlling the gas atmosphere during sputtering can tailor the optoelectronic properties of tungsten oxide thin films, offering potential applications in transparent electronics.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Lijun Song, Chao Wu, Shihui Yu, Xiaohu Wang
Summary: The characteristics of low-cost ZnSnO/Cu/ZnSnO multilayer films as potential flexible transparent electrodes and heaters are investigated. The multilayer films show low sheet resistance, good flexibility, adhesivity, and excellent stability under hot and humid environment.
Article
Materials Science, Multidisciplinary
Yongli Du, Xiaoyong Gao
Summary: N-type CuO:In3+ thin films were prepared by introducing trivalent metallic ions into CuO, exhibiting lower electrical resistivity compared to CuO thin films. These films show potential applications in light-absorbing materials and photovoltaic devices.
Article
Engineering, Electrical & Electronic
Chunhu Zhao, Junfeng Liu, Yixin Guo, Yanlin Pan, Xiaobo Hu, Guoen Weng, Jiahua Tao, Jinchun Jiang, Shaoqiang Chen, Pingxiong Yang, Junhao Chu
Summary: The study optimized aluminum doped ZnO thin films using RF magnetron sputtering, achieving high-quality optical and electrical properties. The optimized films demonstrated excellent optical and electrical characteristics at low resistivity, making them suitable as front contact layers in solar cell applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Marina Alves, Daniel Brito, Joaquim Carneiro, Vasco Teixeira, Sascha Sadewasser
Summary: Typical Cu(In,Ga)Se2 solar cells use an opaque molybdenum back contact, but transparent back contacts are needed for applications such as bifacial, semi-transparent or tandem solar cells. Various transparent conductive oxides have been tested, including indium- or fluorine-doped tin oxide and hydrogen-doped indium oxide. This study investigates a radio-frequency magnetron sputtering deposition process for In2O3:H (IOH), where hydrogen is supplied from an Ar/H2 gas and oxygen is pulsed during deposition. Optimum oxygen and Ar/H2 partial pressures are found, resulting in IOH films with high transparency and low sheet resistance after annealing.
Article
Materials Science, Multidisciplinary
Pei Lei, Xiaoting Chen, Yue Yan, Jingjing Peng, Changshan Hao, Jianchao Ji, Zhongqi Huo
Summary: In this study, zinc-doped indium oxide (IZO) films were grown by magnetron sputtering with controlled discharge voltage and reactive oxygen, and their microstructure, element distribution, chemical bonding, optical and electrical properties were systematically investigated. The results showed that high discharge voltage and matched oxygen vacancies could promote the low resistivity of IZO films, which is determined by the electronic concentration and mobility.
Article
Materials Science, Multidisciplinary
Md. Suruz Mian, Takeo Nakano, Kunio Okimura
Summary: Transparent conductive Al-doped Zinc oxide thin films were deposited on glass substrates using conventional radio frequency magnetron sputtering (C-RFMS) and inductively coupled plasma-assisted radio frequency magnetron sputtering (ICP-RFMS) methods. It was found that ICP-RFMS method exhibited better film thickness uniformity, crystalline orientation, low resistivity, and higher visible light transmittance compared to C-RFMS.
Article
Chemistry, Physical
Alexander Axelevitch
Summary: Transparent conductive oxide (TCO) thin films, such as indium-tin oxide (ITO), are widely used in micro- and optoelectronics, with dynamic hot-probe measurement system being one method to extract the main parameters of the films. This method, demonstrated on commercial ITO films and ZnO:Al layers, can also be applied to other wide-bandgap semiconductors.
Article
Materials Science, Multidisciplinary
Li-Ping Peng, A-Ling He, Liang Fang, Xiao-Fei Yang
Summary: High conductive and transparent indium-doped zinc oxide (IZO) thin films were successfully deposited on glass substrates using radio-frequency magnetron sputtering at low temperature. The influence of deposition pressure on the properties of the films was significant, and the film deposited at 2.0 Pa showed the best performance.
Article
Chemistry, Analytical
M. Toma, R. Domokos, C. Lung, D. Marconi, M. Pop
Summary: This article describes the influence of deposition parameters on the structural, morphological, optical, and electrical properties of ZnO thin films doped with Ga and co-doped with (Ga + Nd). The thin films were fabricated using RF magnetron sputtering with a power of 100 W and a deposition distance of 6 cm. XRD analysis was used to analyze the influence of doping on the film structure. Optical transmission measurements showed a decrease in transparency when dopants were added, and AFM analysis revealed that the type of doping affected the microstructure of the films. Raman and resistivity measurements confirmed successful incorporation of dopants into the ZnO host material.
ANALYTICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Fatiha Challali, Tahar Touam, Valerie Bockelee, Thierry Chauveau, Azeddine Chelouche, Nicolas Stephant, Jonathan Hamon, Marie -Paule Besland
Summary: Al-doped ZnO thin films were deposited using radio frequency magnetron cosputtering. The effect of Al content variation on the properties of the films was studied. The films showed a wurtzite crystalline structure and improved optical and electrical properties after annealing at 300 degrees C. The optimized properties were obtained for an Al content ranging from 1.5 to 5.5 at.%.
Article
Optics
Zhou Lu, Xin Lv, Quan Xie
Summary: Thin transparent semiconductor films of GaMgZnO were prepared on quartz glass substrates using magnetron sputtering technique. The effects of sputtering pressure on the crystallization, micro-structure, electrical and optical features of the films were investigated. The results showed that sputtering pressure significantly influenced the structure and electro-optical characteristics of the films, with the sample prepared under a pressure of 3.6 Pa exhibiting the best quality and performance.
Article
Chemistry, Physical
Zhaoyang Li, Jiwen Li, Mei Xiong, Jinkun Lei, Yiyi Chen, Shengkang Zhang
Summary: This study investigates the effects of Mo single-doping and Mo-Al co-doping on the optical and electrical properties of ZnO thin films. The results show that Mo doping improves carrier concentration and conductivity in ZnO films, while excessive doping leads to the refinement of grain size and the emergence of potential energy traps. However, Mo-Al co-doping enhances the optical properties and introduces Mo5+ into the films. The study also reveals that Mo-4d impurity states appear in the valence band and contribute to the increase of absorption rate and decrease of transmittance in the films.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
A. Lakshmanan, Zachariah C. Alex, S. R. Meher
Summary: In this study, Cu2O thin films were deposited by reactive magnetron sputtering at different substrate temperatures, and their structural, optical, and electrical properties were investigated for potential use as solar cell absorber layers. The films exhibited p-type conductivity with an optical band gap ranging from 1.82 to 2.07 eV.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Mechanical
Xiangyuan Wang, Yixuan Meng, Wei-Wei Huang, Linlin Li, Zhiwei Zhu, LiMin Zhu
Summary: This paper presents the design, modeling, and test of a novel normal-stressed electromagnetic (NSEA) compliant nano-positioning stage. The electromagnetic-mechanical modeling method introduced in this paper accurately predicts the working stroke and natural frequency of the NSEA compliant nano-positioning stage. Experimental results demonstrate the significantly higher prediction accuracy of this method compared to previous methods.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Biochemistry & Molecular Biology
Bowen Shen, Molan Qing, Liying Zhu, Yuxian Wang, Ling Jiang
Summary: Immobilizing enzymes with nanozymes increases catalytic efficiency and stability, with FeS2 nanozymes as ideal carriers. The double-enzyme cascade reaction driven by FeS2 nanozymes shows high glucose selectivity even in the presence of other substances. This research provides new insights into interactions between natural and synthetic biosystems.
Article
Chemistry, Analytical
Qiqi Chao, Yuxi Zhang, Qian Li, Luzhen Jiao, Xufeng Sun, Xuxu Chen, Lina Zhu, Qian Yang, Chengwen Shang, Rong-Mei Kong, Gao-Chao Fan, Zhi-Ling Song, Xiliang Luo
Summary: To accurately identify cancer cells, a logic-gate-assisted cancer imaging system has been developed. This system compares expression levels of biomarkers, improving accuracy for cell identification. It consists of a compute-and-release logic gate, a double-amplified DNA cascade circuit, and a MnO2 nanocarrier, enabling precise imaging of positive cancer cells.
ANALYTICAL CHEMISTRY
(2023)
Article
Physics, Applied
Qing Dai, Yuchen Miao, Xiaorong Qi, Zhenfu Zhao, Feiyu Zhao, Liqiang Zhu, Ziyang Hu
Summary: Ions or charged vacancies drift induced by electric fields in organic-inorganic halide perovskites contribute to resistive switching memory (RSM) devices. Two-dimensional (2D) OIHP films are used as the switching layer to fabricate RSM devices with stable and low voltage resistive switching characteristics. The addition of a NiOx hole transport layer enhances the reliability of RSM devices in atmospheric conditions.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Jinyun Liu, Liying Zhu, Qian Ding, Xirong Lin, Tianli Han, Chaoquan Hu
Summary: The low cost and special structure of biomass materials make them suitable for many energy storage systems. In this study, NiCo2O4 nanowires growing on carbonized ginkgo biloba were developed and used as free-standing anodes for Li-ion batteries. The porous NiCo2O4 nanowires exhibited high capacity and could accommodate volume expansion during cycling. The NiCo2O4/ginkgo biloba anode showed good stability and recoverable rate performance at various current densities, outperforming NiCo2O4/nickel foam and NiCo2O4/carbon cloth. The cost-effective synthesis strategy provides opportunities for other metal oxide/ginkgo biloba-based composites.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Medicinal
Motoyasu Minami, Yukako Honda, Kaoru Ueno, Tetsuya Matsunaka, Junbo Wang, Liping Zhu, Akihito Takano, Takahisa Nakane
Summary: In the Yarlung Zangbo River Valley of the southeastern Tibetan Plateau, we discovered a community of Ephedra saxatilis plants in a xeric steppe with shrubland vegetation habitat. The soil in this area had higher levels of water-soluble cations and nitrogen. Analysis of 13 samples of E. saxatilis revealed variability in the content of ephedrine and pseudoephedrine, with some samples containing both compounds, some containing only ephedrine, and one sample containing only pseudoephedrine.
JOURNAL OF NATURAL MEDICINES
(2023)
Article
Geography, Physical
Paula Echeverria-Galindo, Sonja Rigterink, Julieta Massaferro, Liseth Perez, Bernd Wuennemann, Philipp Hoelzmann, Wengang Kang, Nicole Boerner, Anja Schwarz, Andreas Laug, Ping Peng, Junbo Wang, Liping Zhu, Antje Schwalb
Summary: The recent rise in air temperatures at high altitudes of the Tibetan Plateau has led to increased glacier melt and retreat, as well as enhanced monsoonal precipitation and increased runoff in lakes. These changes have resulted in rising water levels and alterations in the composition of local aquatic biota. Analysis of sediment cores from Nam Co, an endorheic lake, revealed an increase in chironomid richness since 1956, indicating higher water temperatures and intensified primary productivity. The dominance of littoral chironomid assemblages further suggests increasing lake water levels and flooded shorelines due to increased precipitation and glacial meltwater input.
JOURNAL OF QUATERNARY SCIENCE
(2023)
Article
Astronomy & Astrophysics
Chuqi Wu, Shengbang Qian, Fuxing Li, Miloslav Zejda, Zdenek Mikulasek, Liying Zhu, WenPing Liao, Ergang Zhao
Summary: Studying massive binaries in various stages of evolution or environments can provide insights into the evolution of these systems. This study focuses on the rarely studied binaries in the Small Magellanic Cloud (SMC), which has lower metallicity compared to our Milky Way. By analyzing the light curves, it was found that OGLE-SMC-ECL-2063 is a high mass ratio and overcontact binary in the SMC. The research on OGLE-SMC-ECL-2063 provides a basis for studying the formation and evolution of early-type contact binaries.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2023)
Article
Astronomy & Astrophysics
Linfeng Chang, Liying Zhu, Fangbin Meng
Summary: In this study, the periods of the W UMa contact binary systems HH UMa and V1175 Her were found to show cyclic variations, possibly due to a Light Travel Time Effect induced by a third body. The cyclic variation in HH UMa has a period of about 20 years and may be caused by a third body with a mass larger than 0.23 times the mass of the Sun. The period increase in V1175 Her, with a rate of about 2x10^(-7) days per year, indicates mass transfer from the less massive component to its companion.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2023)
Article
Instruments & Instrumentation
Hao Liu, Leijie Lai, Yu Fang, Limin Zhu
Summary: This paper proposes a solution to address the small driving force and nonlinear characteristics of a large stroke flexure-based micropositioning stage driven by a voice coil motor (VCM). The push-pull mode of complementary configurations of VCMs is adopted to improve the driving force, and model-free adaptive control (MFAC) is used for accurate control. The experimental results demonstrate the effectiveness and feasibility of the proposed method, with reduced tracking error and current in the coil.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Health Care Sciences & Services
Lihui Zhu, Na Zhang, Yaojia Hu, Yi Xu, Tingwei Luo, Yuqiong Xiang, Sishan Jiang, Zhiqiang Zhang, Muhua Chen, Yuee Xiong
Summary: This study investigated the knowledge, attitude, and behavior of pediatric healthcare workers regarding children's palliative care (CPC). The results showed that the overall level of knowledge, attitude, and behavior of the healthcare workers about CPC was moderate. Factors such as working years, highest education, professional title, job position, marital status, religion, grade of hospital, type of medical institution, experience of caring for a terminally ill child/kinsfolk, and total hours of CPC education and training received were found to influence CPC implementation and development. Therefore, it is important to emphasize continuous education and training for healthcare workers in CPC and to focus on the mentioned influencing factors to establish targeted training courses and evaluate post-training effects.
BMC PALLIATIVE CARE
(2023)
Article
Materials Science, Multidisciplinary
Zhi Wen Shi, Wei Sheng Wang, Ling Ai, Yan Li, Xin Li Chen, Hui Xiao, Yu Heng Zeng, Li Qiang Zhu
Summary: In this study, a mixed proton and electron conductor hybrid oxide neuromorphic transistor is proposed with the adoption of aqueous solution-processed mesoporous silica coating-based electrolyte as gate dielectric. The device exhibits optical and electrical synergetic coupling behaviors, showing typical synaptic responses and transition between short-term plasticity and long-term plasticity. Furthermore, it demonstrates interesting non-associative learning. The results indicate that the proposed MPEC hybrid oxide neuromorphic transistor has great potential in the field of neuromorphic engineering and could be applied in the bionic visual perception platform.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Biomaterials
Bowen Shen, Wenhan Li, Yuxian Wang, Shuyu Cheng, Xiaonan Wang, Liying Zhu, Yangheng Zhang, Lizeng Gao, Ling Jiang
Summary: Sulfur-containing nanomaterials, such as nano iron sulfide (nFeS), show great promise as nanodrugs for bacterial infection due to their antibacterial activity. However, the inorganic sulfur produced by nFeS can easily change its form or volatilize in aqueous solution, affecting its efficacy. To address this issue, we propose a novel strategy of encapsulating nFeS in a hydrogel to preserve the inorganic sulfides and enhance the interaction between nFeS and bacteria. Our study demonstrates that the nFeS-Hydrogel not only effectively maintains the antibacterial activity, but also exhibits reduced inflammation and excellent biocompatibility. It has great potential as a fast excipient for clearing infection, reducing inflammation, and accelerating wound healing.
BIOMATERIALS ADVANCES
(2023)
Article
Environmental Sciences
Manping Liu, Zhu Li, Simin Li, Fang Liang, Chengwang Huang, Hui Pan, Jie Wu, Siyao Liu, Limin Pu, Peter Christie, Jing Song, Paul Henning Krogh, Xin Ke, Yongming Luo, Longhua Wu
Summary: Soil pollution poses a threat to soil biodiversity and human health, but there are still many unknowns about the impact of heavy metal pollution on soil mite communities and their distribution in areas with complex environmental factors.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Food Science & Technology
Lei Yang, Zhihan Yang, Jiayu Liu, Zilong Liu, Yuxin Liu, Liying Zhu, Zhengming Zhu, Ling Jiang
Summary: As a potential probiotic for health promotion, Clostridium tyrobutyricum has limited industrial applications due to its weak tolerance to oxygen stress during fermentation. In this study, we enhanced its oxidative stress tolerance by deleting the perR gene using the CRISPR-Cas system, resulting in improved growth and butyric acid production in the presence of oxygen. Transcriptome analysis revealed upregulation of genes related to redox balance, and changes in metabolisms were observed. Furthermore, phylogenomic analysis suggested that PerR may be a target for engineering in diverse Clostridium species. These findings have implications for the development of robust C. tyrobutyricum strains for butyric acid production in the food industry.
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)
