Article
Materials Science, Multidisciplinary
Amelia Zieba, Katarzyna Stan-Glowinska, Pawel Czaja, Lukasz Rogal, Janusz Przewoznik, Dorota Duraczynska, Ewa M. Serwicka, Lidia Litynska-Dobrzynska
Summary: Rapidly solidified alloys with nominal compositions of Al76.5Fe23.5 and Al75.8Co24.2, corresponding to the Al13Fe4 and Al13Co4 phases, were produced using a melt spinning technique. The microstructure and phase composition of the ribbons were examined, showing an increase in grain size after heat treatment and phase transformations for both Al13Fe4 and Al13Co4 phases. Catalytic properties for phenylacetylene hydrogenation were studied, with the highest selectivity to styrene observed for the Al13Fe4 alloy in the as-spun state.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Nuclear Science & Technology
Elvira Onorbe, Mercedes Hernandez-Mayora, Rebeca Hernandez, Marta Serrano
Summary: This study investigates the thermal stability of a 9Cr-1Mo ferritic/martensitic steel before and after thermomechanical treatment. The results show that the material after thermomechanical treatment has a more stable microstructure compared to the as received material.
NUCLEAR MATERIALS AND ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Materials Science, Multidisciplinary
Y. Ikeda, R. Yuan, A. Chakraborty, H. Ghassemi-Armaki, J. M. Zuo, R. Maass
Summary: The study revealed the presence of nano-scale intermetallic phase G-phase in uncracked grain boundaries, suggesting it as one of the primary nanoscopic drivers for grain-boundary weakening and crack initiation. These findings shift the focus of LME research to the very early stages immediately following Zn diffusion, where secondary phase nucleation and growth emerge as the root-cause for failure.
MATERIALS TODAY ADVANCES
(2022)
Article
Polymer Science
Ninad Khadse, Rebecca Ruckdashel, Shnaidie Macajoux, Hongwei Sun, Jay Hoon Park
Summary: This article describes the fabrication and performance of thermoresponsive self-crimping fibers using melt-spinning. The fiber diameter, CTE, and modulus have significant effects on the self-crimping behavior of the fibers, and a draw ratio of 2.33 yielded the best performance. The resulting fibers exhibited thermoresponsive behavior comparable to polypropylene-based thermoresponsive fibers in the temperature range of -20 degrees Celsius to 20 degrees Celsius.
Article
Materials Science, Multidisciplinary
Yinzhong Shen, Jianxing Wo
Summary: M3C2 (Cr3C2 type) carbide, a Cr-rich alloy phase, was observed in an 11%Cr ferritic/martensitic steel after normalization and tempering through transmission electron microscopy. The carbide showed irregular block, branch crystal-like, and needle-like morphologies, with sizes ranging from 100 to 350nm in diameter and 200-470nm in length. Its approximate chemical formula was (Cr0.55Fe0.4W0.05)3C2. The formation mechanism of the carbide during tempering was discussed.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Sheng-Yun Su, Yi-Ting Fan, Yan-Jie Su, Chun-Wei Huang, Ming-Hung Tsai, Ming-Yen Lu
Summary: This study aimed to understand the critical lattice distortion effect of G-phase precipitation in CoCrFeNiMo high-entropy alloys using various quantitative methods. It found values of lattice distortion at different scales and discussed the potential impact of atomic bonding and electronic structure on lattice distortion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jin-Hu Dou, Maxx Q. Arguilla, Yi Luo, Jian Li, Weizhe Zhang, Lei Sun, Jenna L. Mancuso, Luming Yang, Tianyang Chen, Lucas R. Parent, Grigorii Skorupskii, Nicole J. Libretto, Chenyue Sun, Min Chieh Yang, Phat Vinh Dip, Edward J. Brignole, Jeffrey T. Miller, Jing Kong, Christopher H. Hendon, Junliang Sun, Mircea Dinca
Summary: Researchers have successfully grown single crystals of 2D metal-organic frameworks up to 200 µm in size by balancing in-plane and out-of-plane interactions, revealing anisotropic transport and a clear correlation between conductivity and the nature of the metal cation in the sheets.
Article
Chemistry, Multidisciplinary
Kevin M. Roccapriore, Nan Huang, Mark P. Oxley, Vinit Sharma, Timothy Taylor, Swagata Acharya, Dimitar Pashov, Mikhail I. . Katsnelson, David Mandrus, Janice L. Musfeldt, Sergei V. Kalinin
Summary: The formation of periodic structures induced by electron beam in multilayer materials provides a new mechanism to control plasmonic response and enable controlled periodic potentials on the atomic scale. This phenomenon offers insights into the fundamental physics of quantum materials and opens up possibilities for device applications.
Article
Materials Science, Multidisciplinary
Elham Sharifikolouei, Baran Sarac, Alexandre Micoulet, Reinhard Mager, Moyu Watari-Alvarez, Efi Hadjixenophontos, Zaklina Burghard, Guido Schmitz, Joachim P. Spatz
Summary: The hardness of AISI316-Ti stainless steel has been improved by generating an amorphous-nanocrystalline microstructure. The fully amorphous structure was obtained using a modified melt-spinning technique, and the hardness was characterized using thermal analysis and nanoindentation analysis.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
K. E. Nygren, A. Nagao, S. Wang, P. Sofronis, I. M. Robertson
Summary: Internal hydrogen has a significant effect on the fatigue lifetime of SUS316L stainless steel, but a minimal impact on the tensile properties. The influence of hydrogen on the microstructural state and deformation twins results in non-linear changes in fatigue lifetime with increasing hydrogen concentration.
Article
Nanoscience & Nanotechnology
Yang Zhang, Wenlong Si, Rong Yu, Jing Zhu
Summary: The study demonstrates the crucial role of interfacial reconstruction in modulating the microstructures and properties of heterostructures, revealing the mechanisms through atomic-resolution imaging and spectroscopy. The reported reconstruction implies the importance of polyhedral and electronic flexibility in the formation of reconstructions and offers possibilities for constructing more functional heterostructures in the future.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Bela Pecz, Nikolaos Vouroutzis, Gyorgy Zoltan Radnoczi, Nikolaos Frangis, John Stoemenos
Summary: Si whiskers grown by Ni-Metal-Induced-Lateral-Crystallization (Ni-MILC) at 413 degrees C have different characteristics compared to those grown by the Vapor Liquid Solid (VLS) method, including crystalline quality and cross-section shape. While both methods face contamination issues, the Ni-MILC grown Si whiskers are more compatible with current CMOS processes.
Article
Polymer Science
Lisa Feuillerat, Olivier De Almeida, Jean-Charles Fontanier, Carole Aubry, Pascal Rumeau, Fabrice Schmidt
Summary: The study aimed to evaluate the effect of different melt spinning parameters on the integrity and degradation process of PEEK yarns. Characterizations of yarns at different stages of melt spinning revealed degradation affecting crystallization temperature and viscosity.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Materials Science, Multidisciplinary
Akinobu Shibata, Goro Miyamoto, Shigekazu Morito, Akiko Nakamura, Taku Moronaga, Houichi Kitano, Ivan Gutierrez-Urrutia, Toru Hara, Kaneaki Tsuzaki
Summary: In this study, the substructures and crystallographic features of as-quenched lath martensite in interstitial-free (IF) steel and low-carbon steel (0.2C steel) were analyzed using advanced microscopy techniques. The study revealed differences in the morphology and habit plane orientation between the two types of steel. Dislocation structures, cementite formation, and carbon segregations were observed, indicating significant changes in the substructure during quenching. Based on the experimental results, the researchers discussed the origin of the substructures and crystallographic features of lath martensite.
Article
Nanoscience & Nanotechnology
S. Saha, A. Rice, A. Ghosh, S. M. N. Hasan, W. You, T. Ma, A. Hunter, L. J. Bissell, R. Bedford, M. Crawford, S. Arafin
Summary: This research presents the epitaxial growth of bulk-like multilayer h-BN using a carbon-free precursor on c-plane sapphire. Material characterization focuses on structural, morphological, and vibrational properties, as well as chemical bonding, with an examination of compressive residual strain induced by lattice and thermal expansion mismatch. The presence of wrinkles due to biaxial compressive strain and crystallographic homogeneity of the films are confirmed through microscopy techniques.
Article
Nanoscience & Nanotechnology
Jiaqi Yu, Anna F. Kolln, Dapeng Jing, Jinsu Oh, Hengzhou Liu, Zhiyuan Qi, Lin Zhou, Wenzhen Li, Wenyu Huang
Summary: A one-pot, two-step hot injection method was developed to prepare Cu6Sn5-Sn hybrid intermetallic-metal nanoparticles with an anisotropic structure, which showed high activity in electrocatalytic nitrate reduction reaction, selectively producing nitrite within a wide reduction potential window.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Tae-Hoon Kim, Haijun Zhao, Phuong-Vu Ong, Brandt A. Jensen, Baozhi Cui, Alexander H. King, Liqin Ke, Lin Zhou
Summary: The study measured the dynamics of Skyrmion lattice formation from the conical phase, finding that the Avrami equation accurately describes the transition process with an initial Avrami constant around 1. An energy barrier with a square-root dependence on temperature and a quadratic dependence on the magnetic field was established, paving the way for precise manipulation of topological spin structures.
Article
Multidisciplinary Sciences
Marion Hoefling, Xiandong Zhou, Lukas M. Riemer, Enrico Bruder, Binzhi Liu, Lin Zhou, Pedro B. Groszewicz, Fangping Zhuo, Bai-Xiang Xu, Karsten Durst, Xiaoli Tan, Dragan Damjanovic, Jurij Koruza, Juergen Roedel
Summary: The study presents a novel method to manipulate the domain structure of ferroelectric materials by mechanically imprinting dislocation networks, leading to significant improvements in electrical properties such as dielectric and electromechanical response. This innovative microstructural approach offers new opportunities for tailoring functional materials.
Article
Chemistry, Physical
Rick W. Dorn, Patrick M. Heintz, Ivan Hung, Kuizhi Chen, Jin-Su Oh, Tae-Hoon Kim, Lin Zhou, Zhehong Gan, Wenyu Huang, Aaron J. Rossini
Summary: In this study, high-resolution solid-state NMR spectroscopy and plane-wave density-functional theory (DFT) calculations were used to describe the atomic-level structure of mesoporous hexagonal boron nitride (p-BN). The results revealed the presence of various B and N signals in p-BN and provided a detailed characterization of the pore and edge/defect sites within the material. This is of great importance for the design and development of next-generation p-BN-based materials.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chaochao Pan, Kruttika S. Phadke, Zheng Li, Gaoyuan Ouyang, Tae-hoon Kim, Lin Zhou, Julie Slaughter, Bryan Bellaire, Shenqiang Ren, Jun Cui
Summary: This article reports on the development of sprayable copper and copper-zinc nanowire inks for antiviral surface coating applications. The results show that copper nanowires can inactivate the SARS-CoV-2 virus faster than bulk copper, and the addition of a trace amount of zinc enhances the virucidal effect. These sprayable nanowire inks can be easily applied on high-touch surfaces and, when combined with chemical disinfectants, extend the disinfecting effect.
Article
Chemistry, Physical
Jiaqi Yu, Shen-Wei Yu, Zhiyuan Qi, Xiaotian Fang, Tae-Hoon Kim, Lin Zhou, Sen Zhang, Wenyu Huang
Summary: PtSn4, the most Sn-rich Pt-Sn intermetallic compound discovered so far, has been limited to single crystal studies due to the lack of success in preparing PtSn4 nanomaterials. This study successfully synthesized monodisperse pure-phase PtSn4 intermetallic nanodisks and revealed the formation mechanism and kinetics of PtSn4. In electrocatalytic furfural reduction, PtSn4 exhibits better catalytic performance than Pt.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Akshay A. Murthy, Paul Masih Das, Stephanie M. Ribet, Cameron Kopas, Jaeyel Lee, Matthew J. Reagor, Lin Zhou, Matthew J. Kramer, Mark C. Hersam, Mattia Checchin, Anna Grassellino, Roberto dos Reis, Vinayak P. Dravid, Alexander Romanenko
Summary: This study provides a detailed assessment of the surface oxide formed in ambient conditions for transmon test qubit devices patterned from a niobium film. The oxide exhibits varying stoichiometry and the Nb2O5 region is found to be semicrystalline with oxygen vacancies and weaker bonds between niobium and oxygen atoms.
Article
Chemistry, Multidisciplinary
Farhan Islam, Yongbin Lee, Daniel M. M. Pajerowski, JinSu Oh, Wei Tian, Lin Zhou, Jiaqiang Yan, Liqin Ke, Robert J. J. McQueeney, David Vaknin
Summary: Magnetic defects play a crucial role in magnetic topological insulators, influencing both the surface transport and bulk magnetic properties. In Bi2Se3-based dilute ferromagnetic (FM) TIs and MnBi2Te4-based antiferromagnetic (AFM) TIs, magnetic defects control the behavior. In Sb2Te3, a fraction of the Mn defects form strong AFM dimer singlets within a quintuple block, while in Sb1-xMnxTe3, the FM correlations are likely driven by magnetic defects in adjacent quintuple blocks.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Ding Wang, Ping Wang, Shubham Mondal, Mingtao Hu, Danhao Wang, Yuanpeng Wu, Tao Ma, Zetian Mi
Summary: The thickness scaling behavior of ferroelectric Sc0.3Al0.7N films grown on Mo substrates by molecular beam epitaxy is reported. The switchable ferroelectricity in ScAlN films with thicknesses ranging from 100 to 5 nm is confirmed. The increase in coercive field and diminution of remnant polarization in films below 20 nm are closely related to surface oxidation and strain state in ultrathin ScAlN films.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Tao Ma
Summary: VecMap is a python-based graphic user interface tool developed to analyze atomic displacements in perovskite ceramics. It automatically outputs displacement vector maps of A-site or B-site cations, and oxygen vector maps if O columns are visible, based on high-resolution STEM images. A specially designed Coupled HAADF-ABF function helps find atoms in ABF images with close atomic numbers. VecMap greatly simplifies the analysis of atomic displacement in perovskite structures.
MICROSCOPY AND MICROANALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Shubham Mondal, Ding Wang, Ping Wang, Yuanpeng Wu, Mingtao Hu, Yixin Xiao, Subhajit Mohanty, Tao Ma, Elaheh Ahmadi, Zetian Mi
Summary: This study demonstrates high-performance self-powered deep UV photodetectors based on the unique optoelectronic properties of an ultrawide bandgap nitride ferroelectric material. These photodetectors exhibit high responsivity and detectivity, low illumination intensity requirements, fast and stable switching response time, and excellent rejection to other light sources. The significant findings reported in this work provide a viable route to achieve high-performance self-powered ferroelectric UV photodetectors for energy-efficient applications.
Article
Physics, Applied
Ding Wang, Ping Wang, Minming He, Jiangnan Liu, Shubham Mondal, Mingtao Hu, Danhao Wang, Yuanpeng Wu, Tao Ma, Zetian Mi
Summary: In this Letter, fully epitaxial ScAlN/AlGaN/GaN based ferroelectric high electron mobility transistors (HEMTs) were demonstrated using molecular beam epitaxy. The fabricated ferroelectric gate HEMTs showed counterclockwise hysteretic transfer curves with a wide threshold voltage tuning range, a large ON/OFF ratio, and reconfigurable output characteristics. The high quality ferroelectric gate stack and effective ferroelectric polarization coupling lead to improved subthreshold performance. These results provide fundamental insight into the ferroelectric polarization coupling and threshold tuning processes in ferroelectric nitride heterostructures and have promising applications in next-generation electronics.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Danhao Wang, Ding Wang, Peng Zhou, Mingtao Hu, Jiangnan Liu, Shubham Mondal, Tao Ma, Ping Wang, Zetian Mi
Summary: Through high-resolution X-ray photoelectron spectroscopy measurements, we discovered a thick oxide layer on ScAlN when exposed to air, which significantly affects its characterization and electronic structure evaluation. By excluding the possible impact from the surface oxide layer, the band alignment of Sc0.18Al0.82N/GaN can be accurately determined. Simulation results further demonstrate that the Sc0.18Al0.82N barrier layer offers excellent charge carrier confinement and a high density of two-dimensional electron gas (2DEG) at the heterostructure interface, crucial for high-performance GaN-based high electron mobility transistors (HEMTs).
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Applied
Kamal R. Joshi, Sunil Ghimire, Makariy A. Tanatar, Amlan Datta, Jin-Su Oh, Lin Zhou, Cameron J. Kopas, Jayss Marshall, Josh Y. Mutus, Julie Slaughter, Matthew J. Kramer, James A. Sauls, Ruslan Prozorov
Summary: Niobium thin films on silicon substrate used in the fabrication of superconducting qubits have been characterized using various analytical techniques. The films exhibit a high superconducting quality, but show complex response to magnetic field and thermomagnetic instabilities. Possible mitigation strategies are discussed.
PHYSICAL REVIEW APPLIED
(2023)
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)
