Effects of Y 2 O 3 /MgO ratio on mechanical properties and thermal conductivity of silicon nitride ceramics

International Journal of Applied Ceramic TechnologyEarly View RESEARCH ARTICLE Effects of Y2O3/MgO ratio on mechanical properties and thermal conductivity of silicon nitride ceramics Shishuai Li, Shishuai Li State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China Shishuai Li and Huanbei Chen contributed equally to this work.Search for more papers by this authorHuanbei Chen, Huanbei Chen Nanjing Electronic Devices Institute, Nanjing, China Shishuai Li and Huanbei Chen contributed equally to this work.Search for more papers by this authorWeide Wang, Weide Wang State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaSearch for more papers by this authorDongxu Yao, Corresponding Author Dongxu Yao yaodongxu@mail.sic.ac.cn State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Correspondence Dongxu Yao and Yu-Ping Zeng, State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Email: yaodongxu@mail.sic.ac.cn; yuping-zeng@mail.sic.ac.cnSearch for more papers by this authorYongfeng Xia, Yongfeng Xia State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, ChinaSearch for more papers by this authorYu-Ping Zeng, Corresponding Author Yu-Ping Zeng yuping-zeng@mail.sic.ac.cn State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Correspondence Dongxu Yao and Yu-Ping Zeng, State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Email: yaodongxu@mail.sic.ac.cn; yuping-zeng@mail.sic.ac.cnSearch for more papers by this author Shishuai Li, Shishuai Li State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China Shishuai Li and Huanbei Chen contributed equally to this work.Search for more papers by this authorHuanbei Chen, Huanbei Chen Nanjing Electronic Devices Institute, Nanjing, China Shishuai Li and Huanbei Chen contributed equally to this work.Search for more papers by this authorWeide Wang, Weide Wang State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaSearch for more papers by this authorDongxu Yao, Corresponding Author Dongxu Yao yaodongxu@mail.sic.ac.cn State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Correspondence Dongxu Yao and Yu-Ping Zeng, State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Email: yaodongxu@mail.sic.ac.cn; yuping-zeng@mail.sic.ac.cnSearch for more papers by this authorYongfeng Xia, Yongfeng Xia State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, ChinaSearch for more papers by this authorYu-Ping Zeng, Corresponding Author Yu-Ping Zeng yuping-zeng@mail.sic.ac.cn State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China Correspondence Dongxu Yao and Yu-Ping Zeng, State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Email: yaodongxu@mail.sic.ac.cn; yuping-zeng@mail.sic.ac.cnSearch for more papers by this author First published: 07 April 2022 https://doi.org/10.1111/ijac.14067 Postal address: 585 He-Shuo Rd. Jiading District, Shanghai 201800, People's Republic of China Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract In this work, the effects of Y2O3/MgO ratio on the densification behavior, phase transformation, microstructure evolution, mechanical properties, and thermal conductivity of Si3N4 ceramics were investigated. Densified samples with bimodal microstructure could be obtained by adjusting the ratio of Y2O3/MgO. It was found that a low Y2O3/MgO ratio facilitated the densification of Si3N4 ceramics while a high Y2O3/MgO ratio benefited the phase transformation of Si3N4 ceramics. Best mechanical properties (flexural strength of 875 MPa, and fracture toughness of 8.25 MPa·m1/2, respectively) and optimal thermal conductivity of 98.04W/(m·K) were achieved in the sample fabricated with Y2O3/MgO ratio of 3:4 by sintering at 1900°C for 4 h. Early ViewOnline Version of Record before inclusion in an issue RelatedInformation