燕山大学学报2012，Vol.36Issue(3)：230-234,5.DOI:10.3969/j.issn.1007-791X.2012.03.009
Si3N4的结构状态对放电等离子烧结制备Sialon陶瓷的影响
Effect of different Si3N4 structure state on synthesis of Sialon by spark plasma sintering
摘要
Abstract
Using nanometer amorphous Si3N4, micrometer α-Si3N4, micrometer A1N, nanometer A12O, and nanometer Y2O3 powders as starting materials, Sialon ceramics are prepared using spark plasma sintering technology. The effect of various Si3N4 structures on the synthesis of Sialon is discussed. The sintered samples are characterized by X-ray diffraction and scanning electron microscopy. Furthermore, the mechanical properties such as hardness and fracture toughness are determined by Vickers indentation method. Also the density is measured in terms Archimedes's principle and the flexural strength is tested by three-point bending method. The results show that when a-SiM is used as starting material, α/β-Sialon ceramics can be prepared by SPS; while when partial a-Si3N4 powder is replaced by nanometer amorphous Si3N4 powder, the relative content of a-Sialon phase in the sintered samples decrease. When a-Si3N4 of formula is totally replaced by nanometer non crystal SijN4, only ^-Sialon phase can be obtained in the sintered samples.关键词
放电等离子烧结/Sialon陶瓷/抗弯强度/断裂韧性Key words
spark plasma sintgering/ Sialon ceramics/ flexural strength/ fracture toughness分类
化学化工引用本文复制引用
赵玉成,张文娜,宋文灿,王明智..Si3N4的结构状态对放电等离子烧结制备Sialon陶瓷的影响[J].燕山大学学报,2012,36(3):230-234,5.基金项目
河北省自然科学基金资助项目(E2010001177,E2009000367) （E2010001177,E2009000367）
