标题:Effects of Y2O3-MgO nanopowders content on mechanical and dielectric properties of porous BN/Si3N4 composites
作者:Zhao, Yujun;Zhang, Yujun;Gong, Hongyu;Wang, Xianli;Sun, Haibin
作者机构:[Zhao, Y] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, 更多
通讯作者:Zhang, Yujun
通讯作者地址:[Zhang, YJ]Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China.
来源:CERAMICS INTERNATIONAL
出版年:2015
卷:41
期:3
页码:3618-3623
DOI:10.1016/j.ceramint.2014.11.025
关键词:C. Dielectric properties;C. Mechanical properties;BN/Si3N4 composites;Microstructure;Pressureless sintering
摘要:Porous BN/Si3N4 composites with different Y2O3-MgO nanopowders have been fabricated by a pressureless sintering method. The densification, phase evolution, microstructure, mechanical properties and dielectric properties of the BN/Si3N4 composites were investigated. The density and mechanical properties of the porous BN/Si3N4 composite ceramics firstly increased with addition of Y2O3-MgO up to 20 wt% and then decreased, while the dielectric properties gently declined as the Y2O3-MgO contents increased. For the porous BN/Si3N4 composites with 20 wt% Y2O3-MgO nanopowders, the porosity, flexural strength and dielectric constant reached 21.9%, 243.6 MPa and 5.5, respectively, which indicated that the composites could be one of the candidates for wave-transparent applications. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:6
Scopus被引频次:9
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921773147&doi=10.1016%2fj.ceramint.2014.11.025&partnerID=40&md5=79042cf257c587f9ce489fd95d795a1c
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