Erosion-Resistant Enhancement of Anti-oxidation Coatings in Hypersonic Flows of Air Plasma

摘要

The problems of creating aircraft are connected to the development of new heat-resistant thermal materials. The paper analyses the possible increase in durability of heat-resistant coatings to erosion in hypersonic streams of air plasma. To achieve this goal, granulation of obtained powders was studied on Fritsch Analysette 22 Micro Tec Plus using the laser diffraction method. The study was conducted using powders of technical silicon KR00, titanium PTOM-1, molybdenum PM 99.95, amorphous boron B-99A, yttrium metal ITM-1. It is established that the absence of films based on amorphous silica leads to an increase in catalyticity of coatings surface in regard to reactions of heterogeneous recombination of dissociated and partially ionized air and consequently to additional heating of the surface. The authors defined rational levels of SiCw in coatings of the Si-TiSi2-MoSi2-B-Y-SiCw systemup to 15 mass%. In the course of the experiment, there was a decline in the average level of erosion and decrease in deviations from the mean mass loss of samples with coatings, modified by SiCw whisker, compared to basic coatings of respective compositions.