High-Temperature Annealing of Cermet Materials Based on Ti–C–NiCr

Abstract

Cermet materials based on titanium carbide and nichrome that were prepared by SHS extrusion were annealed in an oxidizing atmosphere at high temperatures of 800, 900, 950, and 1000°C for 10 h. Dependences of weight gain and oxidation rate of the oxidized samples on temperature and annealing time were plotted. It was found using x-ray phase analysis and scanning electron microscopy that the carbide phases did not change stoichiometry, a new CrNi₃ phase was detected, and oxide films (TiO₂ and Cr₂O) formed on the sample surfaces. TiC carbide grains grew from 2.79 to 3.4 μm as the annealing temperature increased.