Al_2O_3 Particle Size Effect on Reinforced Copper Alloys: An Experimental Study

摘要

Bonding between dissimilar metallic (copper) and non-metallic particles (Al_2O_3) was successfully achieved. The mechanical properties of the copper composite nano-structure with different Al_2O_3 particle sizes ranging from 100 nm to 20 μm were investigated. The alloys were prepared by using electro-less precipitation and particle metallurgy technique at three different sintered temperatures, 900, 950 and 1000℃. The chemical composition of composites were 85 atomic% Cu and 15 atomic% Al_2O_3, of which commercially available Al_2O_3 particles with a purity of 99.5% were used. The microstructure, hardness and compressive stress-strain behaviours were determined. A pin-on-disc system was used to study wear. Electrical resistivity was also measured.