Preparation and Properties of (SiCp+Al₂O_3f)/7075Al Composites by Pressure Infiltration

Abstract:

(SiC_p+Al₂O_3f)/7075Al composites as potential friction materials were prepared in this paper by pressure infiltration and some related properties were compared with traditional friction materials. The addition of Al₂O₃ fiber to SiC preform could contribute to enhance compressive strength of the preform as well as tensile strength of the composites. The tensile strength of as-fabricated composites with 35vol%SiC_p + 15vol% Al₂O_3f could reach 402MPa and the friction coefficient is about 0.4 and the thermal conductivity is higher than 120W/mK. Compared with traditional materials such as nodular cast iron, the composites exhibit better comprehensive properties and are suitable as brake materials for automobile.

• Periodical: Applied Mechanics and Materials (Volumes 496-500)
• Pages: 348-351
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.496-500.348
• Online since: January 2014
• Authors: Hui Xu, Shu Bin Ren*, Qing Nan Hong, Xuan Hui Qu
• Keywords: Al Matrix Composites, Friction Materials, Infiltration, Property

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