Tribological, mechanical and thermal response of diamond micro-particles reinforced copper matrix composites fabricated by powder metallurgy

Abstract

Copper/Diamond composites have gained a lot of attention in recent years due to their excellent thermal conductivity and their potential for use in high-power electronic devices. The current work targets on an experimental investigation of the tribological,mechanical, and thermal behaviour of copper diamond composite by using reinforced micro-diamond particles. Copper matrix composites with varying weight percentages of diamond particles were produced with the aid of the powder metallurgy. The wear tests were carried out on Pin-on-Disc wear test machine as per ASTM G99. The doping of an optimum amount of diamond particles (1% wt.) improved the overall wear performance by 51% under a normal load of 80 N. The doping had also showed a significant improvement in hardness by 26% and thermal conductivity by 1 %. The primary wear mechanisms of Cu-Diamond composites appear to be a combination of brittle fracture, fragmentation of diamond-reinforced particles and ploughing in the Cu-alloy matrix.

Design and tribological performance of graphene nanofluids dispersed by dragging effect of bicomponent gelator

“…The frictional points experience high pressure and temperature, resulting in sintering [50], then coking of the C element and finally adherence of it to the wear surface. According to Poulose et al, the protective film formed at the friction interface by GO enhances thermal conductivity, thereby inhibiting the sintering of lubricating oil [51]. This suggests that charging enables more GO/OA nanosheets to participate in the friction process and then reduces the possibility of degradation of base oil, showing the positive effect on mitigating sintering and coking during the lubrication process [52,53].…”

Production of Cu/Diamond Composite Coatings and Their Selected Properties

“…In this work, the main focus was to determine the effect of diamond incorporation on the structure, mechanical properties, bonding of coatings to the substrate, and the solderability of such coatings. So far, works on the mechanical properties of composite materials have focused on composites produced by various methods, including gas pressure infiltration [ 25 ], combining flake powder metallurgy and vacuum hot-press sintering [ 26 ], powder metallurgy [ 27 , 28 ], and cold spraying [ 29 ]. The use of chemical or electrochemical plating methods is uncommon.…”