Article
Materials Science, Multidisciplinary
Hao Fei, Bojin Pan, Chi Zhang, Yong Jiang, Qingchen Xu, Yilan Lu, Jianming Gong
Summary: This paper investigates the mechanical properties gradient in the surface oxygen diffusion hardened (SODH) layer of Ti6Al4V alloy. The results reveal the relationships between hardness-oxygen content and hardness-yield stress, and demonstrate the decrease in hardness and yield strength with the decrease of oxygen content in the SODH layer. The study also suggests that the oxygen concentration distribution and yield stress distribution can be estimated using hardness measurement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Yong Jiang, Hairong Mao, Wang Xiaowei, Yilan Lu, Jianming Gong
Summary: The oxygen boost diffusion (OBD) treatment resulted in the formation of a hardened layer with increased surface hardness on Ti-6Al-4V alloy, but led to decreased yield strength, tensile strength, and elongation. The decrease in mechanical properties can be attributed to grain growth at high temperatures during OBD treatment and brittle cracking of the oxygen strengthened layer at low strain.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Haotian Tong, Rui Zuo, Dong Qiu, Xin Li, Feng Qiu
Summary: Preoxidation of SiC surface is an efficient method to suppress harmful SiC/Al interfacial reaction and optimize interface bonding. Increasing oxidation temperature or extending oxidation time results in thicker oxide film on SiC surface, effectively isolating SiC from molten Al and suppressing the interfacial reaction. In alloy systems containing Mg, the formation ratio of Al4C3 to MgAl2O4 at the interface is related to the thickness of the oxide film, providing theoretical and experimental basis for preparing SiC/Al composites to improve their comprehensive properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Coatings & Films
Youxing He, Xiaobo Wang, Tao Guo, Kewei Gao, Xiaolu Pang
Summary: The study on CrAlN/SiNx multilayer films revealed that films with a crystalline interface exhibit higher thermal stability and hardness.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Reuben Holmes, Bo Li, O. Toshiyasu, Lijuan Cui, Sho Kano, Huilong Yang, Hiroaki Abe
Summary: In this study, F82H steel and pure Cr metal were joined by solid-state diffusion bonding under high vacuum at various temperatures below Ac1 in the range 964 to 1072 K for 240 min. The diffusion behavior, chemical composition, and microstructure at the F82H/Cr interface and interdiffusion zone were characterized. A hard, M23C6-rich interface layer formed on the Cr side of the joint due to diffusion of C from the F82H steel. Cr diffusion into F82H was only observed at the highest temperature of 1072 K. Hardness testing revealed that no post-bonding heat treatment would be required for the F82H.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Review
Chemistry, Analytical
Liyan Lai, Bing Niu, Yuxiao Bi, Yigui Li, Zhuoqing Yang
Summary: With the development of semiconductor technology, chip cooling has become a major obstacle to enhancing the capabilities of power electronic systems. Traditional electronic packaging materials can no longer meet the heat dissipation requirements of high-performance chips. Metal matrix composites (MMCs) composed of high thermal conductivity (TC) matrix metals and reinforcing phase materials have become the mainstream direction for the development and application of high-performance packaging materials. Silicon carbide (SiC) is the optimal choice for the reinforcing phase due to its high TC, low coefficient of thermal expansion (CTE), and high hardness. This paper reviews the research status of SiC-reinforced aluminum (Al) and copper (Cu) electronic packaging materials, along with the factors influencing their thermo-mechanical properties and improvement measures. Finally, the current research status and limitations of conventional manufacturing methods for SiC-reinforced MMCs are summarized, and an outlook on the future development trends of electronic packaging materials is provided.
Review
Materials Science, Multidisciplinary
Willey Yun Hsien Liew, Hooi Peng Lim, Gan Jet Hong Melvin, Jedol Dayou, Zhong-Tao Jiang
Summary: This paper reviews the degradation issues of metallic coatings due to oxidation and thermal softening at high temperatures in tribological applications. The focus is on the development of durable hard coatings through the alloying of ternary TiAlN coatings with various elements. The properties and effects of deposition parameters, chemical composition, high-temperature annealing, and coating architecture on the coating properties are discussed, providing insights into the challenges and future research perspectives of the reviewed coatings.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Guangxu Yan, Vincent Gill, Chee Lip Gan, Zhong Chen
Summary: A comparative study on Ni-Sn transient liquid phase (TLP) bonded joints with different interlayers was conducted, and the evolution of microstructure, mechanical properties, and high-temperature thermal reliability of the joints was investigated. The results showed that electroplated Ni-Sn TLP bonded joints exhibited higher shear strength and the shear strength increased with bonding time, but decreased with aging time.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Qiang Jia, Zhongyang Deng, Lei Liu, Hongqiang Zhang, Wengan Wang, Limin Ma, Fu Guo, Guisheng Zou
Summary: In this study, a sandwich structure nanoparticle film composed of an Ag transition layer, nanoalloy layer, and Ag transition layer was developed to enhance the interface strength in low-temperature bonding. The optimized sandwich structure significantly increased the shear strength of Ag-based nanoalloy sintered joints. The low-temperature spreadability of the Ag transition layer provided a micro-nano structure and driving force for nanoalloy sintering on the substrate, resulting in easier spreading and higher effective bonding area for the nanoalloy particles. This interface-enhancing strategy enables the Ag-based nanoalloy to be a high-reliability die-attach material with low-temperature bondability.
Article
Materials Science, Multidisciplinary
Ping Li, Lusheng Wang, Bin Wang, Siliang Yan, Miao Meng, Xiaohu Ji, Kemin Xue
Summary: The study reveals that the asymmetrical diffusions at the TA15/Ti2AlNb interface, due to different diffusion coefficients and crystal structures, lead to varied microstructures and mechanical properties. Macro joints exhibit brittle fractures near the TA15 base zone under certain conditions, while nano joints fail in a ductile manner mainly due to size effects.
Article
Materials Science, Ceramics
Tong Zhang, Haiqing Yin
Summary: The mechanical properties and electronic structures of transition elements X (X = V, Mn, Fe, Ni) doped WCoB are explored using first-principles calculation in this study. The results show that high pressure leads to lower lattice constants and less stable structures. W4Co3FeB4 and W4Co3NiB4 have similar stability based on the deviation of cohesive energy and formation enthalpy. The increase of elastic, shear, and bulk moduli under high pressure indicates an increase of covalence. The higher ductility and anisotropy under high pressure are indicated by the increase of Poisson's ratio, B/G ratio, and anisotropy index A(U). The hardness of W4Co4B4, W4Co3FeB4, and W4Co3NiB4 increases under high pressure due to the variation of electronic structures. The density of states (DOS) and partial DOS analysis show lower density around Fermi level and higher hybridization under high pressure. The variation of mechanical properties and electronic structures is similar for W4Co4B4, W4Co3FeB4, and W4Co3NiB4, which is determined by the similar atom properties of Co, Fe, and Ni. Similarly, W4Co3VB4 and W4Co3MnB4 also imply similar variation of mechanical properties and electronic structures.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Bria Storr, Luke Moore, Kallol Chakrabarty, Zaheeruddin Mohammed, Vijaya Rangari, Cheng-Chien Chen, Shane A. Catledge
Summary: Microwave-induced plasma was used to anneal precursor powders containing five metal oxides with carbon and boron carbide as reducing agents, resulting in the synthesis of high entropy boride ceramics with improved hardness and oxidation resistance.
Article
Chemistry, Multidisciplinary
Lei Chen, Quanmin Xie, Yongsheng Jia, Yingkang Yao
Summary: In this study, the potential structures of Si-containing transition-metal nitrides Ti0.5Si0.5N, Zr0.5Si0.5N and Hf0.5Si0.5N under different pressures were explored. A hexagonal phase with P6(3)/mmc symmetry was discovered and found to be stable under ambient conditions. The structural, mechanical and electronic properties of this hexagonal phase were compared with the conventional B1 structure, revealing significantly improved mechanical properties for Ti0.5Si0.5N within the hexagonal phase.
Article
Biochemistry & Molecular Biology
Yuxing Zhou, Ranran Cui, Yi Song, Shuyu Lu, Xinna Hu, Tianhui Wang, Bo Xu, Tao Ma
Summary: This study reports a composite film made of cellulose nanocrystals (CNC), sugar alcohols, and natural pigment anthocyanins, which exhibits a special iridescent color and can function as a pH and humidity sensor. The addition of sugar alcohols improves the optical and mechanical properties of the film. Incorporation of anthocyanins results in significant color changes based on pH and humidity, making it suitable for intelligent food packaging applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Liang Yang, Mingzhu Xie, Jinxin Fang, Tianyun Zhang, Xuemei Wang, Liping Chen
Summary: The study investigated the effects of citric acid, urea, CaCl2, and nano-SiO2 on the properties of CCMS/PVA composite films, showing that citric acid and nano-SiO2 can increase elongation and water resistance, with the best comprehensive performance achieved by adding 30% citric acid and 6% nano-SiO2.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Kaiping Zhang, Peng Peng, Y. Norman Zhou
Summary: High strength NiTi-SS wire joints were achieved using laser welding-brazing mode, which improved the tensile strength and suppressed the overall brittleness of the joints.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
J. P. Oliveira, Jiajia Shen, Z. Zeng, Jeong Min Park, Yeon Taek Choi, N. Schell, E. Maawad, N. Zhou, Hyoung Seop Kim
Summary: In this study, laser welding of rolled CoCrFeMnNi high entropy alloy to 316 stainless steel was conducted, resulting in defect-free joints. The microstructure of the fusion zone was mainly composed of a single FCC phase with increased hardness. The welded joints exhibited good mechanical properties, with fracture occurring at the fusion zone due to the development of a non-favorable large grain size microstructure.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Tiago A. Rodrigues, N. Bairrao, Francisco Werley Cipriano Farias, A. Shamsolhodaei, Jiajia Shen, N. Zhou, Emad Maawad, Norbert Schell, Telmo G. Santos, J. P. Oliveira
Summary: A functionally graded material (FGM) part was successfully fabricated using twin-wire and arc additive manufacturing (T-WAAM) process, with retained d-ferrite found in a Cu matrix and a smooth gradient of hardness and electric conductivity along the FGM sample height. The FGM part exhibited an ultimate tensile strength of 690 MPa and an elongation at fracture of 16.6%.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Tao Guo, Kangqiang Pan, Yixuan Jiao, Bai Sun, Cheng Du, Joel P. Mills, Zuolong Chen, Xiaoye Zhao, Lan Wei, Y. Norman Zhou, Yimin A. Wu
Summary: A versatile memristor with volatile/non-volatile bifunctional properties has been developed, enabling non-volatile memory, selectors, artificial neurons, and artificial synapses. This provides advantages in terms of circuit simplification and manufacturing costs.
NANOSCALE HORIZONS
(2022)
Article
Engineering, Electrical & Electronic
Ningyue Mao, Pablo D. Enrique, Albert I. H. Chen, Norman Y. Zhou, Peng Peng
Summary: The increasing demand for smart devices has led to the development of advanced sensors. Integrating thin film technology into sensor fabrication can reduce size and enable new manufacturing techniques, but reliable fabrication remains a challenge.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Cecilio J. Martinez-Gonzalez, Enrique A. Lopez-Baltazar, Francisco Alvarado-Hernandez, Victor H. Baltazar-Hernandez, Dulal C. Saha, Elliot Biro, Norman Zhou
Summary: In this study, DP980 steel was subjected to different thermal cycles to investigate the tempering of martensite. The results showed that the tempering stage of martensite was most advanced in the furnace-tempered specimens, followed by the GMAW and RSW specimens. Softening kinetic models were developed to predict the extent of softening in the GMAW specimens.
Article
Nanoscience & Nanotechnology
Tao Guo, Jiawei Ge, Bai Sun, Kangqiang Pan, Zhao Pan, Lan Wei, Yong Yan, Y. Norman Zhou, Yimin A. Wu
Summary: Artificial synapses are crucial for neuromorphic computing chips, but existing biomaterial-based synapses face limitations. In this study, researchers developed a flexible and biocompatible artificial synapse using egg albumen@CuO material. This synapse successfully mimics biological synapse functions and achieved high accuracy in pattern recognition through neuromorphic computing simulations. The results provide insights for the development of biocompatible and wearable neuromorphic computing chips.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. Shehryar Khan, Y-H Cho, S. Zhang, F. Goodwin, E. Biro, Y. N. Zhou
Summary: Advanced high-strength steels (AHSSs) are difficult to join using fusion welding processes. Weld-brazing offers a solution with lower heat input and reduced welding defects. This study shows that weld-brazed joints can be used for load-bearing applications with the right type of Zn-coated steel and proper joint geometry. The type of Zn coating and root geometry are the main factors influencing joint strength and fracture mode.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Yu Xiao, Guisheng Zou, Jinpeng Huo, Tianming Sun, Bin Feng, Lei Liu
Summary: In this study, multiple core-shell SiC@ SiO2 nanowires were successfully integrated into MoS2 transistors as multi-gates for active control of extendable logic applications. Nanowire gates locally enhance carrier transportation, and the use of multiple NGs can achieve designed band structures to tune device performance. This research provides new possibilities for localized, precise control of band structures and the fabrication of highly integrated, multifunctional, and controllable nano-devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
A. Zhanwen, Guisheng Zou, Wenzheng Zhao, Bin Feng, Chengjie Du, Yuxi Wu, Yu Xiao, Jinpeng Huo, Ying Wu, Lei Liu
Summary: The micro-drilling of metals using ultrafast laser is a topic of great interest in various industrial applications. However, achieving high drilling quality remains a challenge due to the unclear mechanism of hole shaping, particularly the origin of ellipticity and bulges that appear at hole exits. This study reveals that the emergence of hole ellipticity is determined by the material's ablation threshold and polarization-dependent energy absorption on the hole wall. Furthermore, a special hole geometry with a converging effect leads to the formation of bulges at hole exits when the laser beams are reflected by the hole wall. These findings contribute to the understanding of hole-shape formation mechanism and provide a basis for controlling hole shape in high-quality micro-drilling.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Chengjie Du, Guisheng Zou, Bin Feng, Jinpeng Huo, A. Zhanwen, Yu Xiao, Wengan Wang, Lei Liu
Summary: Microstructural-simulation-based machine learning was used to predict the effective thermal conductivity (ETC) of sintered Ag, achieving excellent accuracy and efficiency compared to existing analytical and semi-empirical models.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Joshua Jones, Monika R. Snowdon, Shasvat Rathod, Peng Peng
Summary: This work presents a direct laser writing (DLW) process capable of rapidly depositing flexible copper or copper oxide structures with a high degree of control over electrical properties. The DLW process uses a low-power fiber laser beam to selectively irradiate a thin film of copper ions to form and interconnect copper nanoparticles. This method can produce high-quality flexible electronic components with a range of potential applications.
FLEXIBLE AND PRINTED ELECTRONICS
(2023)
Article
Physics, Applied
Maryam Soleimani, Peng Peng, Walter Duley, Y. Norman Zhou
Summary: In this paper, the authors demonstrate that the electrical and mechanical properties of CuO nanowire networks can be adjusted through sequential processing with nanosecond laser radiation. In the first stage, high strain and oxygen vacancy concentration are induced, leading to the breaking of NWs and modification of their electrical conductivity. In the second stage, laser irradiation results in the bonding of NWs and the creation of junctions, enhancing the overall electrical conductivity.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Manufacturing
Shuaiqi Wang, Guisheng Zou, Yongchao Wu, Zhongyang Deng, Rongbao Du, Lei Liu
Summary: Cu nanoparticle film was patterned into micro bumps using pulsed laser deposition (PLD) and successfully formed all-Cu interconnects without CMP pretreatment. The fabricated bumps showed excellent mechanical quality and bonding performance at high temperatures and pressures. This strategy is of great significance for the development of future chiplet integration.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Zhongyang Deng, Guisheng Zou, Rongbao Du, Qiang Jia, Hongqiang Zhang, Lei Liu
Summary: In this study, nano-Ag films with different particle size distribution were fabricated using different pulsed laser deposition techniques. The interface bonding of the films was investigated and it was found that the films fabricated using the femtosecond laser had the smallest particle size and highest shear strength. The interface connection ratio was identified as the dominant factor affecting shear strength and fracture behaviors. The study provides new insights into interface bonding enhancement.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
