Microstructure and Mechanical Properties of Hot-pressed TiB2 Ceramics

Abstract

Abstract: TiB₂ ceramics with Y₂O₃-Al₂O₃ as sintering aids were fabricated by hot-pressing. The effects of sintering temperature, holding time, and crystallization
annealing on microstructure and mechanical properties were investigated. The experimental results show that the flexural strength and fracture toughness of TiB₂ ceramics
decrease and the weight loss increases with sintering temperature rising up; with holding time prolonged, the uniformity of microstructure decreases and
this is disadvantageous to the mechanical properties. The grain diameter has a significant influence on the mechanical properties of TiB₂ ceramics. The
crystallization annealing can result in YAG phase from grain boundaries and enhance the flexural strength at high temperature of TiB₂ ceramics.

Key words: TiB₂ ceramics, microstructure, mechanical properties, crystallization annealing

CLC Number:

TB301

LUO Xue-Tao,XIE Xiao-Lin,YUAN Run-Zhang. Microstructure and Mechanical Properties of Hot-pressed TiB₂ Ceramics[J]. Journal of Inorganic Materials.

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Microstructure and Mechanical Properties of Hot-pressed TiB₂ Ceramics

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