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Flexural strength and fracture studies of al-si/sicp composites

Yusof Abdullah, and Abdul Razak Daud, and Roslinda Shamsudin, and Mohd b. Harun, (2009) Flexural strength and fracture studies of al-si/sicp composites. International Journal of Mechanical and Materials Engineering, 4 (2). pp. 109-114. ISSN 1823-0334

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Official URL: http://ejum.fsktm.um.edu.my/ArticleInformation.aspx?ArticleID=767

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Applied Physics
Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Applied Physics
Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Applied Physics
Malaysian Nuclear Agency

Abstract

Ambient temperature mechanical properties of Al-7Si/SiCp composite prepared by stir casting process were studied. Microstructure, flexural, hardness and tensile tests of Al-7Si alloy reinforced with 10 and 20 wt.% SiCp were investigated. Samples were characterized by scanning electron microscopy (SEM) while three point bend tests were performed to study the flexural strength of the composites. Hardness and bending tests indicated that reinforcing the Al-Si matrix with SiCp improved the hardness and flexural strength. SiCp improved the flexural strength mainly by acting as barriers to cracks whereby cracks normally initiated at the debonded particle/matrix interface. The porosity content increased with the increasing number SiCp present in the matrix. However, it was believed that the high flexural strength and hardness were due to the good bonding properties of the matrix/particle interface. Fine SiCp was play a role to increase the surface area and promotes better strength of the composites.

Item Type:Journal
Keywords:Al-Si/SiCp composite, flexural strength, fracture, bonding.
Subjects:T Technology, Engineering
ID Code:10276

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