Research of contact interaction of titanium-chromium diboride with Ni-Cr alloys

Abstract

The contact interaction of titanium-chromium diboride with alloys on the base of nickel is researched. It is established that small additives of chromium promote spreading of nickel on the surface of titanium-chromium diboride because chromium is surface-active element and promotes reducing surface tension of melt Ni-Cr. The energetic parameters of wetting are calculated and it is shown that contact angles in limits 0-20^о are formed in these systems. The microstructure of interaction zone of titanium-chromium diboride with Ni-Cr alloys is studied and it is shown, that as a result of interaction the new chemical compounds are not formed, and contact zone is characterized by strict boundary between metal alloy Ni-Cr and refractory component TiCrB₂. The optimum compositions of metallic binders for composite materials on the base of TiCrB₂ are determined.