维普中文期刊产品整合服务

High porosity and low thermal conductivity high entropy(Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2C

查看全文 作　　者：Heng [1,2]Chen;Huimin [1]Xiang;Fu-Zhi [1]Dai;Jiachen [2]Liu;Yiming [3]Lei;Jie [3]Zhang;Yanchun [1,2]Zhou 高影响力作者 机构地区：[1]Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China;[2]Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;[3]Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第8期,共6页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China under Grant Nos. U1435206 and 51672064;Beijing Municipal Science & Technology Commission under Grant No. D161100002416001 摘　　要：Porous ultra-high temperature ceramics(UHTCs)are promising for ultrahigh-temperature thermal insulation applications.However,the main limitations for their applications are the high thermal conductivity and densification of porous structure at high temperatures.In order to overcome these obstacles,herein,porous high entropy(Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))C was prepared by a simple method combing in-situ reaction and partial sintering.Porous high entropy(Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))C possesses homogeneous microstructure with grain size in the range of 100–500 nm and pore size in the range of 0.2–1μm,which exhibits high porosity of 80.99%,high compressive strength of 3.45 MPa,low room temperature thermal conductivity of 0.39 W·m^-1K^-1,low thermal diffusivity of 0.74 mm^2·s^-1and good high temperature stability.The combination of these properties renders porous high entropy(Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))Cpromising as light-weight ultrahigh temperature thermal insulation materials. 关 键 词：Ultrahigh temperature CERAMICS (UHTCs) HIGH ENTROPY CERAMICS (Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))C Thermal CONDUCTIVITY POROSITY
相关文献

参考文献(37)

引证文献(29)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费