The Constitution of Со–Zr Phase Diagram

   

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2015, #09/10
http://www.materials.kiev.ua/article/2000

Abstract

The constitution of the Co–Zr system in the Zr2Co–Zr region is studied by physicochemical analyses (metallography, X-ray diffraction, differential thermal analysis). It is shown that the Zr3Co phase exists in the system, though the literature data on its existence and formation are contradictory. It forms in solid state at 981 °C via peritectoid reaction , and its homogeneity range at 900 °С is no larger than 1 at.%. The eutectic point is found in the alloy with ~22 at.% Co. Microhardness of the Zr2Co and Zr3Co phases is determined.


COBALT, PHASE, PHASE EQUILIBRIA, ZIRCONIUM