Влияние использования спековой технологии на структуру материалов в системе карбид кремния —бор.

Abstract

In the present work, we examined the effect of the use of pre-sintering technology on the structure of ceramic materials in silicon carbide —boron system. The influence of pre-sintering technology use on the formation of the structure of ceramic materials with the content of boron additive (SiC–xB, where x= 5, 10 wt. %) is determined. Hardness was measured for the obtained materials and scanning electron microscopy was performed. Materials obtained by classic technology had a monolithic structure and porosity characteristic of the solid-state sintering mechanism. The materials obtained by the pre-sintering technology had an equal crystalline structure with low intercrystalline porosity and an almost complete absence of regions with high coherence of boundaries. The highest hardness (27,2 GPa) was possessed by a material containing 10 wt. % boron and obtained by classic technology.