Effects of tungsten carbide and cobalt particles on corrosion and wear behaviour of copper matrix composite

Abstract

Copper matrix composites reinforced with various contents (10-20 wt-%) and sizes (1-9 mm) of tungsten carbide particles (WC p ) and cobalt particles (Co p , 1 . 5 mm and 5 wt-%) were fabricated by hot pressing. The effects of WC p and Co p on the wear and corrosion properties of the copper composites were evaluated. Dry wear testing was conducted in ambient conditions and wear corrosion testing was carried out in 3 . 5 wt-%NaCl solution (pH 6 . 7). The results show that the hardness, wear resistance and static corrosion weight loss of Cu/WC p composites increase with a decrease of WC p size or with an increase of WC p content. Also, the corrosion current density I corr increases with a decrease of WC p size or with an increase of WC p content, and the corrosion potential E corr exhibits no specific trend with varying WC p content and size.The wear corrosion rate increases with an increase in WC p content, yet shows no direct correlation with WC p size. On the other hand, Cu/WC p /Co p composites exhibit better wear resistance in both dry wear and corrosive wear conditions.

Influence of reinforcement weight fraction on microstructure and properties of submicron WC–Cop/Cu bulk MMCs prepared by direct laser sintering

“…Besides the process optimization, the capability of particle characteristics of the reinforcement, such as size scale and weight fraction, in changing the properties of bulk MMCs is becoming an important consideration. In fact, not much work has previously been focused on the investigation of submicron particulate reinforcement on the final properties of MMCs, although abundant studies related to micro-scaled and even nanometer-scaled reinforcements have been conducted [28,29]. As a further step in obtaining high performance bulk MMCs with controllable microstructures and properties, the present study employed the DMLS process to prepare a series of submicron WC-Co particulate reinforced Cu matrix composites with variation of component ratios.…”

Influence of sintering time on diffusion bonding of WC-10Co and AISI4340 by spark plasma sintering

“…There have been many research studies to resolve such difficulties and make a successful bonding. Many techniques have been used, including the brazing technique with an interlayer of various alloying elements [4][5][6], powder-powder diffusion bonding [2,7,8], pressing and sintering techniques [9,10], hot compaction diffusion bonding [11,12], and SPS technique [13].…”

Tailored reinforcement/matrix interface and thermodynamic mechanism during selective laser melting composites

“…2 WC/Cu composites, with excellent transpiration cooling performance, high temperature strength and resistance to erosion performance, are typically used as a missile/rocket engine nozzle vane air rudder and the nose cone. 3 Research in the material removal machining of PRMMCs is still developing, although it has made good progress in few areas. 4 However, it seems that these machining methods cannot completely meet the high industry requirement because of the processing inaccuracy, poor surface finish and the resultant limited mechanical properties.…”