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Enhanced properties of Cu/Sn alloy matrix composites reinforced with β-silicon nitride whiskers

Published online by Cambridge University Press:  12 March 2014

Jinwei Yin ,
Yuping Zeng ,
Dongxu Yao ,
Yongfeng Xia  and
Kaihui Zuo
Jinwei Yin*
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, China
Yuping Zeng*
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, China
Dongxu Yao
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, China
Yongfeng Xia
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, China
Kaihui Zuo
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, China
*
a)Address all correspondence to these authors. e-mail: yuping-zeng@mail.sic.ac.cn
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Abstract

Cu/Sn alloy matrix composites reinforced with β-Si3N4 whiskers (β-Si3N4w/Cu/Sn) were prepared by powder metallurgy method with the aim of improving the mechanical property. Although the β-Si3N4 whisker additions played a side effect on the densification of the composites, the mechanical property was significantly improved. The highest bending strength of β-Si3N4w/Cu/Sn reached up to 353 MPa, and the highest hardness of composites was also improved to 97.13 HRF. β-Si3N4 whiskers could induce the improved work of fracture and grain refinement of composites and thus brought about the enhancement of mechanical performance. However, excessively high β-Si3N4 whisker content was not beneficial to the high mechanical property because of the low densification and the severe aggregation of whiskers. The β-Si3N4w/Cu/Sn still had a quite high thermal conductivity. As a result, the β-Si3N4w/Cu/Sn could be a promising material applied in a severe environment.

Keywords

compositesstrengthhardness
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 6 , 28 March 2014 , pp. 770 - 777
Copyright
Copyright © Materials Research Society 2014 

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