人工晶体学报2011，Vol.40Issue(5)：1181-1187,7.
β-SiAlON晶须的诱导合成和生长机制研究
Study on Inducing Synthesis and Growth Mechanism of β-SiAlON Whisker
摘要
Abstract
β-SiA10N whiskers were synthesized from β-SiA10N powder ( inducing seed) , SiC ( basal body) , Si powder, Al powder and A12O3 powder. The microstructure, compositions of β-SiA1ON whiskers and mechanical property of β-SiAlON/SiC composite were detailed discussed, and the growth mechanisms of β-SiAlON whiskers based on thermodynamic analysis were subsequently developed in this paper. The results shows that (1) the addition of β-SiAlON seed is beneficial to formation of (3-SiAlON whisker, and the vapor-liquid-solid ( VLS) and vapor-solid ( VS) mechanisms could be adopted to explain the behavior of whiskers growth;(2) while the p-SiA10N whiskers grows in VLS mechanisms, the diameter of rodlike and fibrous wiskers is the range of 200-300 nm and the z value of β-SiAlON whisker is about 1.56; whereas in VS mechanisms, the diameter of rodlike and bamboo-like whiskers with well developed crystalline is the range of 0. 5-1. 5 μm and the z value is about 1. 76; ( 3) β-SiAlON whisker has improved the fracture strength of p-SiA10N/SiC composites, the higher flexural strength(55. 2 Mpa) can be obtained from the composites with many whiskers and in higher porosity (32.1% ).关键词
β-SiAlON晶须/生长机制/微观结构/力学性能Key words
β-SiAlON whisker/ growth mechanism/ microstructure/ mechanical property分类
化学化工引用本文复制引用
岳昌盛,彭犇,郭敏,张梅..β-SiAlON晶须的诱导合成和生长机制研究[J].人工晶体学报,2011,40(5):1181-1187,7.基金项目
国家自然科学基金(50874013,51074009) （50874013,51074009）
国家科技支撑计划资助项目(2011 BAB03 B02) （2011 BAB03 B02）
教育部新世纪优秀人才支持计划(NCET-07-0071,NCET-08-0723)资助项目 （NCET-07-0071,NCET-08-0723）
