Pressureless Sintering of Refractory Grade β-Si3N4 Powder and Mechanical Properties of the Sintered Materials

Journal of Inorganic Materials

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Pressureless Sintering of Refractory Grade β-Si₃N₄ Powder and Mechanical Properties of the Sintered Materials

XU Xin; HUANG Li-Ping; CHEN Yuan; FU Xi-Ren

Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China

Received:1998-07-08 Revised:1998-07-23 Published:1999-06-20 Online:1999-06-20

Abstract

Abstract: Refractory grade β-St₃N₄ powder was pressureless sintered with the aim of lowering cost. It is showed that β-St₃N₄ has good sinterability. A microstructure with small rod-like grains was obtained, which dispersed uniformly in the matrix, no abnormal rod-like grains was observed. The material displayed a strength of 587MPa and fracture toughness of 5.3MPa.m^1/2, which allow the material used in normal circumstance.

Key words: silicon nitride, refractory grade, pressureless sinter, microstructure, mechanical property

CLC Number:

TQ163

XU Xin,HUANG Li-Ping,CHEN Yuan,FU Xi-Ren. Pressureless Sintering of Refractory Grade β-Si₃N₄ Powder and Mechanical Properties of the Sintered Materials[J]. Journal of Inorganic Materials.

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Pressureless Sintering of Refractory Grade β-Si₃N₄ Powder and Mechanical Properties of the Sintered Materials

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