Title: The Analysis of Tensile Strength and Microstructure of Ni-SiC Composites Prepared by Electroforming
Abstract: Ni-SiC metal matrix composites with two kinds of SiC content were prepared by electroforming in a nickel sulphamate bath.The effect of heat treatment on tensile strength and microstructure of Ni-SiC composites were investigated.The heat treatment at 300℃ increases tensile strength,but the heat treatment at 600℃ decreases the tensile strength.The complete reaction between nickel and SiC particles can produce shrinkage pores in the interface.In addition,the volume of shrinkage pores is equal to 8% of that of SiC particles in the composites.The interfacial reaction products are composed of Ni_3Si and a little(amount) of Ni_(31)Si_(12) at 600℃.The fracture process includes microcracks initiation,growth,and coalescence.The cracking of the matrix,debonding of Ni-SiC interface and cracking of particles are three types of cracking modes.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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