INVESTIGATION OF THE STRUCTURE AND PROPERTIES OF MATERIALS IN THE SiC - TiB_2 SYSTEM

摘要

The structure and properties of sintered and hot-pressed materials of the SiC - TiB_2 system were investigated. The optimal conditions for obtaining dense ceramics with minimum grain size of the phase components was determined. It was established that composites containing from 25 to 50 vol. percent TiB_2 have a bend strength equal to 450 MPa at 20 deg C; this increases to approx 500 MPa at 1600 deg C for ceramics with a pseudoeutectic structure. The material is highly heat resistant in the temperature range 900-1200 deg C.