High-temperature annealing of ceramic materials based Ti-C-NiCr

Abstract

In this work, high-temperature annealing in an oxidizing atmosphere at temperatures of 800, 900, 950 and 1000 oC for 10 hours of cermet materials based on titanium carbide and nichrome was carried out, using the SHS-extrusion method. On the basis of experimental data, dependences of weight gain on temperature and annealing time were plotted. On the basis of X-ray phase analysis and the results of scanning electron microscopy, it was found that the carbide phases do not change stoichiometry, a new CrNi3 phase is detected, and oxide films (TiO2 and Cr2O) are formed on the surface of the body. It has been established that with an increase in the annealing temperature, TiC carbide grains grow from 2,79 to 3,4 µm.