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Low volume fraction SiCp/AA 380.0 composites fabricated by vacuum infiltration

Published online by Cambridge University Press:  31 January 2011

Wen-Sheng Chung ,
Shou-Yi Chang  and
Su-Jien Lin
Wen-Sheng Chung
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
Shou-Yi Chang
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
Su-Jien Lin
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
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Abstract

A vacuum infiltration process has been developed to fabricate the aluminum matrix composites reinforced with low volume fraction (<50 vol%) of SiCp. Generally, it is difficult to fabricate low volume fraction particulate composites by traditional infiltration processes because the particles always pack up to about 50 vol% in the preforms or compacts. In this study, the powder compacts were prepared of the well-mixed Ni-coated SiCp and pure aluminum powders and then were packed in quartz tubes. An aluminum alloy (Al–8.7% Si–2.6% Cu) with a composition similar to AA 380.0 was used to infiltrate these compacts. Experimental results showed that the infiltration temperature of 640 °C is favorable for the fabrication of these composites. Infiltration behavior, microstructure, nickel distribution, bending test, and fractography of the composites were investigated.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 3 , March 1999 , pp. 803 - 810
Copyright
Copyright © Materials Research Society 1999

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