无机材料学报2017，Vol.32Issue(5)：509-516,8.DOI:10.15541/jim20160425
hBN含量对Si3N4-hBN复相陶瓷性能和微观结构的影响
Effect of hBN Content on Property and Microstructure of Si3N4-hBN Composite Ceramics
摘要
Abstract
Si3N4-hBN composites were prepared using hot-press method with nano-scaled powder,the influence of hBN content on density,mechanical properties,tribological properties,microstructure of Si3N4-hBN composites were investigated.The density and mechanical properties of composites were measured by Archimedes method,three point bending method and Vickers indentation method.The tribological properties of composites were measured by friction and wear tester.The phase composition and microstructure of composites were analyzed and observed by XRD,EDAX and SEM,LSCM.The results showed that with increase of hBN content the composites' density gradually decreased,the composites' porosity increased at first and then stable gradually,the composites' mechanical performance gradually decreased.The friction tests indicated that the tribological properties of Si3Na-hBN and GCrl5,with pair under dry friction,increased at first and then decreased sharply with the increase of hBN content.The friction coefficient and wear coefficient decreased gradually when hBN content was less than 20％,and then increased sharply when the hBN content was more than 20％.The friction coefficient reaches the lowest value of 0.31 when the hBN content was about 20％.The addition of hBN influenced the mechanical and tribological properties of Si3N4-hBN composites through directly influenced its microstructure.关键词
Si3N4-hBN/致密度/力学性能/微观结构/摩擦学性能Key words
Si3N4-hBN/density/mechanical properties/microstructure/tribological properties分类
化学化工引用本文复制引用
张昌松,刘强,陈威..hBN含量对Si3N4-hBN复相陶瓷性能和微观结构的影响[J].无机材料学报,2017,32(5):509-516,8.基金项目
国家自然科学基金(51405278) （51405278）
陕西科技大学引进博士科研启动基金(BJ11-01) （BJ11-01）
陕西省自然科学基础研究计划项目(2015JM5242) （2015JM5242）
特种材料及制备技术四川省高校重点实验室开放基金(szjj2015-088)National Natural Science Foundation of China(51405278) （szjj2015-088）
Shaanxi University of Science and Technology Scientific Research Foundation to introduce Dr.(BJ11-01) （BJ11-01）
Shaanxi province natural science foundation research project(2015JM5242) （2015JM5242）
Open Research Subject of Key Laboratory of Special Material and Preparation Technology of Institutes in Sichuan Higher Education (szjj2015-088) （szjj2015-088）
