Evaluation of the Thermal Stability of Composite Powder Materials in a Plasma Jet

The paper presents the results of studying thermal stability of materials operating in a plasma jet under high temperature and rapid thermal load variation conditions. It has been shown that the use of plasma generators along with the introduction of various powder materials make it possible to simulate the operating conditions of the parts exposed to high-temperature gas flows containing heated particles. The effect of the introduced powder materials on the thermal stability of samples prepared by plasma spraying from molybdenum, as well as tungsten and tungsten-based compositions was studied. An experimental setup was proposed for evaluating the thermal stability of the composites and protective hardening coatings operating under high-temperature gas flows, which also allows determining erosion resistance.