The effect of boron nitride (h-BN) and silicon carbide (SiC) on the microstructure and wear behavior of ZA40/SiC/h-BN hybrid composites processed by hot pressing
Emre Deniz YALÇIN, Aykut Çanakçı, Hamdullah Çuvalcı, Temel Varol, Abdullah Hasan Karabacak
Abstract
Within the scope of this study, silicon carbide (SiC) and hexagonal boron nitride (h-BN) powders were added as reinforcement into zinc-aluminum (ZA40) matrix powders, and the powder metallurgy (PM) method, which is an advanced technique in material production, was used to fabricate ZA40/SiC/h-BN hybrid composites.In the milling process, the asreceived powders were mechanically milled at 400 rpm under a protective argon atmosphere for 2 h at room temperature.The hybrid composite powders were consolidated under 700 MPa pressure at 515 • C for 3 h by hot pressing.Weight losses, friction coefficients, and wear rates were calculated by traveling 100 and 200 m at 250 rpm in a ball-on-disc abrasion test setup under 5 and 10 N loads.According to the results, it was seen that SiC and increased h-BN reinforcement changed the mechanical and physical properties of the composites and made significant contributions to the wear resistance and load-carrying capacity.K e y w o r d s : ZA40, silicon carbide