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Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation

文献类型：期刊论文

作者Long X4; Hu B3; Feng YH(冯义辉)2; Chang C1; Li MY3
刊名INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
出版日期2019-10-01
卷号161页码:9
ISSN号0020-7403
关键词Silver nanoparticles Silver microparticles Nanoindentation Microstructure Constitutive behaviour
DOI10.1016/j.ijmecsci.2019.105020
通讯作者Long, Xu(xulong@nwpu.edu.cn) ; Li, Mingyu(myli@hit.edu.cn)
英文摘要During the sintering process, a three-dimensional network-like porous structure forms as the consequences of atom diffusion and neck formation among silver particles. In this paper, two representative types of pressureless sintered silver particles, in, silver nanoparticles (AgNP) and silver microparticles (AgMP), are investigated to reveal the intrinsic correlation between microstructure and constitutive behaviour. The heterogeneous microstructure is found to result in distinguishing differences in terms of morphology and thermal stability. The difference of sintering mechanisms between these two types of silver pastes are observed by a scanning electron microscope and discussed. Regarding thermal stability, the effect of particle size and shape on the sintering temperature and mass loss are evaluated using the thermogravimetric analysis and the differential scanning calorimetry. The microstructural effect on the mechanical behaviour of both sintered AgNP and AgMP samples is measured by performing nanoindentations with a Berkovich indenter penetrated up to 2000 nm with different indentation strain rates. During indentation, Young's modulus and hardness are measured as the functions of penetration depth. By solving dimensionless equations, the parameters of a power-law constitutive model are obtained analytically based on the integrated work done in the loading stage and the contact stiffness in the unloading stage in the nanoindentation experiments. The correlation between microstructure and constitutive behaviour is elucidated by the comparison of sintered AgNP and AgMP but further investigations related to the size and shape effects of particles are expected.
分类号一类
WOS关键词STRAIN-RATE SENSITIVITY ; LOW-TEMPERATURE ; INSTRUMENTED INDENTATION ; PASTE
资助项目National Natural Science Foundation of China[51508464] ; Natural Science Foundation of Shaanxi Province[2017JM1013] ; Astronautics Supporting Technology Foundation of China[2019-HT-XG] ; Fundamental Research Funds for the Central Universities[3102018ZY015] ; PhD Research Startup Foundation of Taiyuan University of Science and Technology[201704]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:000496863500005
资助机构National Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province ; Astronautics Supporting Technology Foundation of China ; Fundamental Research Funds for the Central Universities ; PhD Research Startup Foundation of Taiyuan University of Science and Technology
其他责任者Long, Xu ; Li, Mingyu
源URL[http://dspace.imech.ac.cn/handle/311007/81202]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Taiyuan Univ Sci & Technol, Sch Appl Sci, Taiyuan 030024, Shanxi, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Harbin Inst Technol, Shenzhen Key Lab Adv Mat, Shenzhen Grad Sch Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China;
4.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Shaanxi, Peoples R China;
推荐引用方式
GB/T 7714		 Long X,Hu B,Feng YH,et al. Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation[J]. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,2019,161:9.
APA Long X,Hu B,冯义辉,Chang C,&Li MY.(2019).Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation.INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,161,9.
MLA Long X,et al."Correlation of microstructure and constitutive behaviour of sintered silver particles via nanoindentation".INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 161(2019):9.

入库方式： OAI收割

来源：力学研究所

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