Экологически безопасная технология получения плакированного порошка технической керамики

Abstract

Application of fuller materials for creation of the higt-strength coatings on part operating under abrasive wear is one of the promising ways of the resources increasing of road construction, emergency rescue and other types of equipment. However, in their creation process does not always comply with the environmental safety requirements, which leads to negative consequences for the natural environment and human health. The article presents the research work results of authors team created a coated powder by chemical vapor deposition of metal-organic compounds on the alumina particles surface and its applications for the wear-resistant coatings. A method of applying iron-tungsten coating on powder technical ceramics by thermal decomposition of vapors, containing iron pentacarbonyl and tungsten hexacarbonyl, is characterised by sequential application on powder particles of adhesion layer from mixture of iron pentacarbonyl and carbon monoxide in volume ratio of vapours1:5 at temperature of their thermal decomposition of 250 °С, and then surface layer from mixture of tungsten hexacarbonyl and carbon monoxide in volume ratio of vapours1:5 at temperature of their thermal decomposition of 800 °С. Metallization powder materials are carried out in a closed cycle, excluding contact workers with toxic substances and emissions of pollutants into the atmosphere, which ensures the safety of the production process. Plasma coatings obtained with the necessary physical and mechanical properties are obtained, which proves the effectiveness of the employed approach and promotes resource increase of the machines elements, subjected to abrasive wear.