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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 3    December 2009

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Thermal expansion and mechanical properties of high reinforcement content SiCp/Cu composites fabricated by squeeze casting technology
CHEN Guo-qin(陈国钦)1, XIU Zi-yang(修子扬)1, MENG Song-he(孟松鹤)2,
WU Gao-hui(武高辉)1, ZHU De-zhi(朱德志)1

1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

Abstract:High reinforcement content SiCp/Cu composites (φp=50%, 55% and 60%) for electronic packaging applications were fabricated by patent cost-effective squeeze-casting technology. The composites appear to be free of pores, and the SiC particles are distribute uniformly in the composites. The mean linear coefficients of thermal expansion (CTEs, 20−100 ℃) of as-cast SiCp/Cu composites range from 8.8×10−6 ℃−1 to 9.9×10−6 ℃−1 and decrease with the increase of SiC content. The experimental CTEs of as-cast SiCp/Cu composites agree well with the predicted values based on Kerner model. The CTEs of composites reduce after annealing treatment due to the fact that the internal stress of the composite is released. The Brinell hardness increases from 272.3 to 313.2, and the modulus increases from 186 GPa to 210 GPa for the corresponding composites. The bending strength is larger than 374 MPa, but no obvious trend between bending strength and SiCp content is observed.

 

Key words: SiCp/Cu composites; electronic packaging; thermal expansion coefficient; mechanical properties

ISSN 1672-7029
CN 43-1423/U

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