Advanced structural materials based on the Ti-Cr-Al-C system

Abstract

The SHS process of the Ti-Cr-Al-C powder mixture is studied in the paper. The increase in the content of chromium in the mixture is shown to decrease the maximum temperature of the front of combustion wave. If the content of chromium in the mixture is above 20 wt.%, the process proceeds in the nonstationary combustion mode. Nanolaminate phases Ti 2 AlC and Ti 3 AlC 2 or their mixtures are found to be formed when the content of chromium is not more than 20 wt. %. The addition of chromium increases the oxidation resistance of materials which can be recommended for use under extreme operating conditions, as an example for electrical contacts, bearings, heating elements, heat exchangers, and high-temperature ceramics.