Technology of ceramic material siliconborating impact on the properties of protective covering

Abstract

The process of successive saturation of the carbide silicon and disilicide molybdenum reaction-sintered ceramics and properties of protective covering have been investigated. Silicon and boron diffusion saturation was found to provide complete recovery of dioxide silicon and obtaining the protective covering on the material surface. It was found that the silicon saturation can reduce more than twice the content of harmful admixtures in ceramics, silicon dioxide in particular. The saturation of carbide silicon and disilicide molybdenum by silicon reduces the content of harmful admixtures and thereby improves their properties. The main disadvantage of the silicon carbide and disilicide molybdenum products is their low resistance to high temperature oxidization. The method of combination of harmful admixtures under high-temperature treatment and chemical reactions was investigated. The process of carbide silicon and disilicide molybdenum saturation by the non-metallic materials has testified the heaters technological parameters to be improved. The investigation of the heat-resistant covering properties testified, that the hexaboride silicon increases in 2-4 times the ceramics stability under high-temperature sintering and retards undesirable diffusion processes on the covering distribution edge - basis and covering – environment. Carried out investigations make possible to conclude that creation of the protective covering on the surface of the reaction – sintered ceramics materials retards undesirable diffusion process, which occur on the edge basis – silicon-borid covering, and to increase the operating life of the protective layer. Carbide silicon and disilicide molybdenum silicon-boride covering provides complete recovery of the dioxide silicon and creation of the sufficient thickness hexaboride silicon heat-resistant layer on the material surface. The hexaboride silicon layer improves in 2 times the ceramics stability under vacuum annealing and in 4 times in the inert environment, the argon in particular. Creation of the triple phase on the edge covering – environment under siliconborating increases the heat-resistance covering stability and retards the undesirable processes, which occur on the edge hexaboride silicon-ceramics.

Authors and Affiliations

Vasyl Kovbashyn, Ihor Bochar

Keywords

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  • EP ID EP571471
  • DOI -
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How To Cite

Vasyl Kovbashyn, Ihor Bochar (2015). Technology of ceramic material siliconborating impact on the properties of protective covering. Вісник Тернопільського національного технічного університету, 78(2), 130-139. https://europub.co.uk/articles/-A-571471