α/β-Sialon Ceramic and its Fatigue Life

Abstract

Abstract: The investigations were mainly focused on the phase composition, microstructure and fatigue life of α/β-Sialon
ceramics prepared from powder mixtures of Si₃N₄, AlN, Al₂O₃ and Y₂O₃ by gas pressure sintering. The results obtained show
that the Sialon ceramics material is mainly composed of 70% β-Sialon, 30% α-Sialon with a small amount crystalline
phase and glassy phase on grain boundaries. The cyclic fatigue life testings were conducted by using a commercial servohydraulic machine
operated under load control, with a sinusoidal wave form at a frequency of 25 Hz and load ratios (R) of 0.1. The operations lead
to result that fatigue limit stress is about 75% static strength for this material.

Key words: α/β-Sialon, fatigue life, microstructure

CLC Number:

TB323

WU Feng-Ying,LAI Ting-Rong,ZHUANG Han-Rui,WANG Pei-Ling. α/β-Sialon Ceramic and its Fatigue Life[J]. Journal of Inorganic Materials.

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α/β-Sialon Ceramic and its Fatigue Life

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