不同烧结气氛下SiAlON/cBN陶瓷复合材料的性能研究  

Properties of SiAlON / cBN ceramic composites in different sintering atmosphere

作　　者：石晓飞[1] 李拓文 何超[1] 蔡志新[1] 岳新艳[1] 茹红强[1] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]沈阳市民营科技机构协调服务中心,沈阳110003

出　　处：《材料与冶金学报》2015年第3期207-210,共4页Journal of Materials and Metallurgy

基　　金：国家科技部重大专项课题资助项目(2012ZX04003-061)

摘　　要：以Si3N4、Al N、Al2O3和c BN为原材料,采用放电等离子烧结,在氮气、氩气和真空三种不同烧结气氛下制备Si Al ON/c BN陶瓷复合材料.通过XRD、SEM及力学性能评估等手段研究了材料的物相组成、显微组织、体积密度、硬度以及断裂韧性等性能.结果表明:真空气氛下制备的Si Al ON/c BN陶瓷复合材料显微组织相对致密,具有较高的体积密度、硬度和断裂韧性.SiA1ON/cBN ceramic composites were prepared in different sintering atmosphere by the spark plasma sintering method with Si3 N4, AlN, A12 03 and cBN powders as raw materials. Phase composition, microstructure, bulk density, hardness and fracture toughness of the SiA1ON/cBN ceramic composites were investigated by means of XRD, SEM and mechanical performance assessment. The experimental results showed that the SiA1ON/cBN ceramic composites prepared in vacuum have relatively dense microstructure and higher bulk density, hardness and fracture touc, hness.

关 键 词：SiAlON/cBN 放电等离子烧结 烧结气氛 显微组织与性能 

分 类 号：TB333[一般工业技术—材料科学与工程]