Article
Materials Science, Composites
Hong He, Yuexing Zhang, Xiaoliang Zeng, Zhenqiang Ye, Chenxu Zhang, Ting Liang, Junwei Li, Qinghua Hu, Ping Zhang
Summary: A composite thermal interface material consisting of SEBS and flake graphite was reported, showing high thermal conductivity and good stretchability. The material can reduce thermal contact resistance, enhance heat transfer, and alleviate warpage failure caused by stress concentration in electronic products.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Composites
Huan Cao, Senlin Gu, Huanhuan Liu, Yongjin Li
Summary: By introducing a small amount of spherical alumina into highly filled polypropylene/flake graphite composites, this study improved the thermal conductivity on the through-plane direction of the sheet samples. The spherical alumina particles effectively disrupted the orderly alignment of graphite platelets in the matrix, enhancing the interconnection between the FG platelets along the thickness direction of the composites and improving thermal conductivity along the through-plane direction.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Composites
Huan Cao, Lijun Ye, Yucong Jin, Jiayao Wang, Jiahui Hong, Yongjin Li
Summary: This study investigates the effects of flow during injection molding on the structural development of thermally conductive networks in PP/FG composites, revealing the asymmetric response of fillers and the resulting discrepancy in thermal conductivity at different ends of the composite.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Composites
Qian Liu, Zexian He, Juanjuan Cheng, Youming Chen, Fang Wang, Zheng Lv, Jingjing Qi
Summary: Graphite flake/Al composites are considered promising thermal management materials due to their lightweight and excellent thermal properties. The interface structure plays a crucial role in impacting the thermophysical properties, and a prediction model has been developed to evaluate the effect of interface structure on the interfacial thermal conductance and thermal conductivity. Different interface layers with high thermal conductivities can effectively improve the overall thermal conductivity of the composites.
COMPOSITE INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Chaoyu Wang, Yishi Su, Qiubao Ouyang, Di Zhang
Summary: Investigating the effects of graphite flake size on the properties of Gr/Al and Gr(GNP)/Al composites, it was found that introducing GNP to graphite flakes can effectively enhance through-plane thermal conductivity, with the improvement ratio increasing with the increase in graphite flake size. Additionally, the enhancement of GNP on through-plane thermal conductivity and flexural strength of Gr/Al composites increases as the graphite flake size increases, attributed to the strengthening effect of GNP on the interface region.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Zhimeng Tang, Lei Xu, Zemin Wang, Zhaohui Han, Jianhua Liu
Summary: By using rapid microwave sintering and adding titanium, the performance of graphite/copper composites can be significantly improved, enhancing their interface bonding and increasing the density, hardness, and thermal conductivity of the composites.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Hong Sun, Nan Deng, Jianqiang Li, Gang He, Jiangtao Li
Summary: A facile and scalable intermittently electroplated method was applied to prepare Cu-coated graphite flake composite powders, which exhibit excellent thermal conductivity and bending strength after sintering. The uniform and compact Cu shell effectively inhibits the segregation accumulation of graphite flakes, contributing to homogeneous distribution in the sintered composites.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ning Li, Yongjian Zhang, Yang Zhang, Xitao Wang, Haijun Wu, Li-Dong Zhao, Hailong Zhang
Summary: This study achieves a record high thermal conductivity and compatible coefficient of thermal expansion (CTE) in diamond/aluminum composites by incorporating bimodal diamond particles. The excellent thermal transport property is attributed to increased heat transport channels and well-bonded interfaces. The research highlights the importance of diamond/aluminum composites as promising thermal management materials.
MATERIALS TODAY PHYSICS
(2022)
Article
Materials Science, Composites
Subhransu S. Pradhan, Lakshmi Unnikrishnan, Smita Mohanty, Sanjay K. Nayak
Summary: This study prepared polycarbonate nanocomposites using graphite flake and multi-walled carbon nanotube fillers at varying weight percentages by melt mixing technique. The nanocomposites showed significant improvements in thermal conductivity and EMI shielding performance, with optimized electrical conductivity achieved at specific loading percentages. The morphology of the composites confirmed the dispersion of fillers in the PC matrix, making them suitable for various commercial applications.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Physical
Jianquan Sang, Ye Yuan, Wulin Yang, Jiajun Zhu, Licai Fu, Deyi Li, Lingping Zhou
Summary: By preparing WC layers of different thicknesses using magnetron sputtering and studying the interface structure, density, and thermal conductivity of the composites, it was found that thermal boundary conductance is the main factor affecting the variation of thermal conductivity in the composites. Adjusting the interlayer thickness to optimize higher thermal boundary conductance is crucial for enhancing the thermal conductivity of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Jianghui Cheng, Guoyuan Chen, Sensen Li, Feng Hou
Summary: The article reports a novel method for preparing phase change composites with high thermal conductivity and inhibited leakage by constructing a network of graphite nanoplatelets and Cu nanoparticles. The method demonstrates a significant increase in thermal conductivity, showing potential for improving thermal management performance in high-energy consumption devices.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Jianquan Sang, Qingling Chen, Wulin Yang, Jiajun Zhu, Licai Fu, Deyi Li, Lingping Zhou
Summary: This study proposes a new method to synthesize micron SiC particles on the diamond surface at low temperature. The results show that Al4C3 plays a crucial role in promoting the formation of SiC particles, and SiC particles with a continuous structure can effectively inhibit the formation of Al4C3 at the interface of the composite.
SURFACES AND INTERFACES
(2022)
Article
Polymer Science
Min Huang, Yexin Tian, Nizao Kong, Gen Liao, Chong Ye, Liqin Fu, Bingjie Wen, Kun Jia, Shuang Wang, Jinshui Liu, Fei Han
Summary: Spherical graphite (SG) has potential as a thermal conductive filler due to its high thermal conductivity, low density, and spherical shape. However, its poor electrical insulation limits its use in electronic device packaging. This study coated the surface of SG particles with a uniform silicon carbide (SiC) ceramic layer to improve its electrical insulation. The resulting SiC-coated SG-derived pad exhibited significantly enhanced electrical insulation and higher thermal conductivity, making it suitable for electronic packaging applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Manufacturing
Yingchun Liu, Bing Chen, Kun Wu, Maoping Lu, Enxiang Jiao, Jun Shi, Mangeng Lu
Summary: The study developed a facile and environmentally friendly strategy to prepare hierarchically ordered graphite film strips@polydopamine/epoxy composites, inspired by mussels and a Chinese delicacy. The organized TCNs and optimized interface led to an ultra-high TC of GFs/EP in the perpendicular direction. The structural analysis and heat-transfer passages model suggested that the superior TCNs were constructed and the designed structure is conducive for heat conduction in the perpendicular direction.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Junchen Huang, Guodong Miu, Tongle Liu, Chen Huang, Shibo Guo, Qian Liu
Summary: Graphite flake-carbon fiber reinforced copper matrix composites were prepared using vacuum hot pressing technology. The study found that an appropriate amount of carbon fiber can effectively improve the bending strength and thermal conductivity of the composites, while excessive addition leads to a decrease in performance.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Zeyu Bian, Chen Yang, Hongyi Zhu, Dechao Zhao, Mingliang Wang, Huawei Zhang, Zhe Chen, Haowei Wang
Summary: This study reveals that Al3Sc precipitates at the Al/Al9FeNi interface can improve interface stability and enhance the creep properties of eutectic Al alloys. The mechanisms behind this improvement are elucidated through load transfer effect and enhanced threshold stress.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yu Ma, Han Chen, Ming -Xing Zhang, Ahmed Addad, Yi Kong, Matthieu B. Lezaack, WeiMing Gan, Zhe Chen, Gang Ji
Summary: Strength-ductility trade-off is a common challenge in engineering materials, including metal matrix composites (MMCs). In this study, a precipitation-assisted interface tailoring (PAIT) mechanism is proposed to improve the coherency of the interface between reinforcement particles and matrix. By introducing an interphase (IP) and using a specific manufacturing process, a TiB2/Al-Zn-Mg-Cu composite with higher strength and ductility is achieved. The PAIT mechanism effectively promotes dislocation multiplication and subsequent annihilation, leading to an increased work hardening rate and higher ductility.
Article
Chemistry, Physical
Yuanyuan Li, Qian Wang, Huawei Zhang, Hongyi Zhu, Mingliang Wang, Haowei Wang
Summary: The hydrogen trapping performances of Al with different solute atoms X (X = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, or Zn) and X-vacancy defects have been investigated using the First-principles method. The study reveals that Cr is the most effective element for hydrogen trapping due to its lowest trapping energy. Furthermore, the interaction of X-vacancy defects in Al is found to favor hydrogen capture compared to X-doped Al supercells. The insights obtained from this study provide valuable guidance for the design of new alloys with enhanced resistance to hydrogen embrittlement.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Y. D. Chen, C. Y. Dan, Q. W. Shi, L. Jin, J. Liu, C. Chen, C. Li, H. W. Wang, Z. Chen
Summary: This study investigated the influence of low heating rates on the recrystallization of Al-Mg alloys as a complement to the theory of recrystallization related to heating rates. It was observed that the starting recrystallization temperature (Ts) at 5°C/min was higher than that at 10-20°C/min, unlike the recrystallization at high heating rates. A three-stage evolution of Ts with heating rates was proposed, showing a decrease, an increase, and then a decrease again. The evolution of Ts was discussed to be controlled by the competition between recovery and recrystallization, with the massive consumption of stored energy reducing the driving force of recrystallization at low heating rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zhiping Wang, Qingqing Pu, Yugang Li, Peikang Xia, Jiwei Geng, Xianfeng Li, Mingliang Wang, Dong Chen, Haowei Wang
Summary: The effects of combined Ti and Zr addition on the microstructures and mechanical properties of Al-Zn-Mg-Cu alloy were investigated. The results show that the addition of Ti and Zr promotes the precipitation of nano L12 Al3(Ti,Zr) dispersoids. However, the presence of primary D022 Al3Ti and Al3(Ti,Zr) phases reduces both the strength and ductility. The addition of minor Ti and Zr elements provides a simple approach to improve toughness and reduce cost in developing high-strength Al alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Kaiwei Wu, Siming Ma, Xin Fang, Yang Li, Wenbin Kan, Haowei Wang, Mingliang Wang, Jun Liu, Zhe Chen
Summary: In this study, the SEBM technique was used to manufacture an in-situ TiB2 particle reinforced AlSi10Mg composite, which showed good surface quality and high relative density with optimized processing parameters. The composite exhibited a refined equiaxed grain structure and uniform distribution of eutectic Si phase, while the nano-sized TiB2 particles were partly agglomerated. After treatment, the composite demonstrated improved yield strength, ultimate tensile strength, and maintained a high elongation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Y. D. Chen, C. Y. Dan, C. Chen, C. X. Chen, L. Jin, H. W. Wang, Z. Chen
Summary: Particle-reinforced metal matrix composites exhibit different recrystallized textures compared to unreinforced alloys. This study used quasi in situ EBSD observation to investigate the particle stimulated nucleation (PSN) behavior in a TiB2/Al-3wt%Mg composite. The observations revealed that PSN grains recrystallized faster and were influenced by the local strain in the particle deformation zone (PDZ). However, the PSN grains were still confined to the PDZs and showed little influence from orientation preference in the grain growth process.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Chen Yang, Kangbao Wang, Chenyi Dan, Jie Huang, Mingliang Wang, Zhe Chen, Shengyi Zhong, Xianfeng Li, Haowei Wang
Summary: Ultrafine-grained structures were successfully obtained in in-situ TiB2/Al-Mg-Gd neutron shielding composites through powder metallurgy routines and the presence of multi-scaled particles. The composite exhibited improved mechanical properties due to the optimization of grain size and grain boundaries. Grain refining mechanisms were discussed, showing the formation of equiaxed ultra-fine grains through pinching off process or progressive lattice rotation. The effects of multi-scaled particles on dynamic recrystallization were analyzed, leading to accelerated misorientation accumulation and suppressed dynamic grain growth.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Ying Zhou, Lei Wang, Han Chen, Jun Liu, Chengyi Dan, Siming Ma, Haowei Wang, Zhe Chen
Summary: By introducing in-situ synthesized TiB2 nanoparticles, the strength and ductility of rolled 2024 Al alloy can be simultaneously enhanced, thus overcoming the strength-ductility trade-off dilemma faced by traditional aluminum alloy sheets and significantly alleviating the mechanical anisotropy of the rolled material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
S. W. Zong, X. J. You, J. Yang, J. Yang, C. Y. Dan, L. Jin, Q. W. Shi, H. W. Wang, Z. Chen
Summary: An in-situ tensile test of Al-6wt.%Mg alloy was conducted to investigate the relationship between slip transmission and fracture behavior. Detailed analysis of 1400 grain boundaries (GBs) was performed using in-situ electron backscatter diffraction. Three slip transmission parameters were analyzed to characterize dislocation-GBs interactions. Both intergranular and intragranular fracture were observed, with intergranular fractures occurring at slip-blocked GBs and intragranular fractures coinciding with grains having observed slip transmission.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Han Chen, Yanchi Chen, Yifei Tang, Gang Ji, Yves Brechet, Shengyi Zhong, Haowei Wang, Guanyun Yan, Zhe Chen
Summary: The Portevin-Le Chatelier (PLC) effect is a common phenomenon in many alloy systems that leads to variations in flow stress. The influence of precipitation on PLC behavior and flow stress has not yet been fully understood. This study investigates the influence of the PLC effect on flow stress in three cases: without precipitates, with shearable precipitates, and with non-shearable precipitates. A modified constitutive relationship is proposed to quantify the contribution of the PLC effect in these cases. The modeling results are in good agreement with experiments on AlMg and AlMgScZr alloys, showing that PLC-induced strengthening can account for up to 14.5% of the total flow stress in AlMg alloys.
Article
Engineering, Mechanical
Xiaojiao You, Jian Yang, Chengyi Dan, Qiwei Shi, Shengyi Zhong, Haowei Wang, Zhe Chen
Summary: The slip transfer mechanism is studied through in-situ tensile tests and high-throughput computing on an Al-Mg alloy. A statistical analysis is performed on a large number of grain boundaries and slip pairs, considering various factors. Two new slip transfer parameters, N and B, are proposed and a decision tree model is built to evaluate their prediction accuracy. The results show that these new parameters are more effective than the existing parameter. The new slip transfer parameters improve our understanding of the mechanism and can be integrated into plasticity models for predicting material behavior.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Siming Ma, Jing Dai, Chengcheng Zhang, Mingliang Wang, Jun Liu, Lei Wang, Haowei Wang, Zhe Chen
Summary: Enhancing the high temperature mechanical properties and thermal stability of aluminum alloys for lightweight applications is crucial. This study introduces TiB2 nanoparticles into an Al-Cu-Mg-Fe-Ni alloy matrix, resulting in a TiB2/Al composite with refined and bimodal grain structure that remains stable after thermal exposure. The composite shows improved high temperature strength and strength retention, particularly at 200°C, without sacrificing ductility. The effects of TiB2 particles on strengthening mechanisms and microstructure evolution were investigated. This research provides valuable insights for the development of high strength and heat resistant aluminum matrix composites.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Qiwei Shi, Hongru Zhong, Dominique Loisnard, Lei Wang, Zhe Chen, Haowei Wang, Stephane Roux
Summary: High-resolution electron backscatter diffraction (HR-EBSD) is gaining attention in materials research, and correlating simulated and experimental diffraction patterns is an important branch of HR-EBSD. However, there are secondary effects that limit the accuracy of correlation, such as non-uniform electron energy and Kikuchi band asymmetry. A recent study suggested using the gradient of diffraction patterns to improve the identification of K-band edges and enhance calibration accuracy. By analyzing the gray level profiles of K-bands, it was found that using gradients improved crystal orientation uncertainty and the continuity of calibrated projection center position at grain boundaries.
MATERIALS CHARACTERIZATION
(2023)
