High-toughness Lu2O3-doped Si3N4 ceramics by seeding

被引：23

作者：

Guo, Wei-Ming ^{[1
]}

Yu, Jun-Jie ^{[1
]}

Xiong, Ming ^{[1
]}

Wu, Shang-Hua ^{[1
]}

Lin, Hua-Tay ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Si3N4; ceramics; beta-Si3N4; seed; Lu2O3; additive; Microstructure; Toughness; SILICON-NITRIDE CERAMICS; RARE-EARTH RE; MECHANICAL-PROPERTIES; MICROSTRUCTURE CONTROL; PHASE-TRANSFORMATION; OXIDE ADDITIVES; IMPROVEMENT; BETA-SI3N4; ADSORPTION; OXIDATION;

D O I：

10.1016/j.ceramint.2015.12.137

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Previous reports showed that Lu2O3-doped Si3N4 ceramics had excellent high-temperature strength, but relatively coarse microstructure and low toughness. This work studied the effects of two kinds of beta-Si3N4 seeds with similar small diameter and different aspect ratio on Lu2O3-doped Si3N4 ceramics. Results showed that the addition of seed with small diameter and low aspect ratio produced more bimodal and finer self reinforced microstructure with the elongated grains of small diameter, and thus led to more significant improvement in fracture toughness, compared to the ceramics without seed or with seed of similar diameter and high aspect ratio. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：6495 / 6499

页数：5

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