In-situ compaction and sintering of Al2O3-B4C composites by using a High-Frequency Induction System

Abstract

Alumina powders containing varying ratios of B4C were mixed in a V-type mixer for 30 min with 35 cycle/min to obtain a homogeneous mixture. Six different chemical compositions were prepared and sintered at 1600• C for 20 min using an Ultra-High-Frequency Induction Heated System. The samples were cooled by air. The density, surface roughness, hardness and microstructure of samples were investigated. The results showed that when the amount of B4C increased, the values of hardness increased and the values of surface roughness decreased.K e y w o r d s : alumina, boron carbide, sintering, induction, composite

Ceramic Matrix Composites for Aero Engine Applications—A Review

“…These properties allow the boron carbide to ionize radiation [31]. The combination of alumina matrix with boron carbide creates a high-temperature and high-pressure-resistant composite CMC material which can be used in high structural applications [31,32]. The literature indicates that 10-40% vol of B 4 C whiskers have been tested and showcased the higher density results.…”