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

 
E.P.Pugachevska,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Adhesion of Melts and Brazing of Materials - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2008, #41
http://www.materials.kiev.ua/article/292

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 0-20о 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.