Tribological investigation of ZA-27 alloy based micro/nano mixed composites

Abstract

Mixed micro/nano ZA-27 based composites were obtained by compocasting technique. Structural, mechanical and tribological properties were investigated. Structural and mechanical tests indicated on presence of structural irregularities in form of non-uniform distribution of reinforcement and their agglomeration as well. Despite deterioration of structural and mechanical properties in comparison to the pure base ZA-27 alloy, tribological tests were positive, due to absence of material transfer that occurs during counter-body steel ball against the base alloy. Material transfer from the ZA-27 alloy to the steel ball surface results in higher values of coefficient of friction and wear rates in comparison to the tested composites.