Abstract
SiC particles were coated with copper and nickel respectively through electroless plating process to investigate the plating effect on mechanical properties of SiCp/Fe composites. It shows that tensile strength and final elongation of the composite improve significantly after the plating treatment of SiC particles. Compared with the composite reinforced by uncoated one, the maximum increase of tensile strength is 20.1% reinforced by nickel-coated SiC particles with the particle size of 21μm and volume fraction of 20%. The maximum tensile strength among the SiCp/Fe composites reaches 928.3MPa where the composite is reinforced by nickel-coated SiC particles with the particle size of 13μm and volume fraction of 10%. In contrast with that reinforced by uncoated SiC particles, the highest increment of final elongation is 19.6% reinforced by copper-coated SiC particle with the particle size of 13μm and volume fraction of 20%. Electroless plating on SiC particle surface may effectively prevent the direct contact in the interfaces between the SiC particles which can reduce the risk of micro-crack formation, so as to improve the properties of composite.
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