Pressureless densification, microstructure tailoring and properties of Ta0.8Hf0.2C-based composites

doi:10.1016/j.jeurceramsoc.2017.10.025

	Pressureless densification, microstructure tailoring and properties of Ta0.8Hf0.2C-based composites
	Zhang, Buhao 2; Yin, Jie 1; Chen, Jian ; Huang, Yihua ; Liu, Xuejian ; Huang, Zhengren
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2018
卷号	38 期号:4 页码:1227
关键词	Ta0.8Hf0 C-2-based composites Solid solution Pressureless densification Microstructure tailoring Thermal/mechanical properties
ISSN号	0955-2219
DOI	10.1016/j.jeurceramsoc.2017.10.025
英文摘要	Ta0.8Hf0.2C (TH) ceramics are desirable for applications in ultra-high temperature environments, but they are difficult to be sintered pressurelessly. TH ceramics were densified up to 98.8% from commercial powders via pressureless sintering (PLS) at 2473 K. SiC was introduced as secondary phase to tailor microstructures and improve properties of TH. The influence of SiC volume fraction on the densification, microstructure evolution and room-temperature properties of TH-based ceramics were examined. Average grain size of TH was refined from 13.6 down to 2.0 mu m. 10 vol% SiC addition contributed to densification of Ta0.8Hf0.2C-SiC (THS) composites with a relative density of 99.6%. The mechanical properties of THS were fairly good, and thermal properties of sintered THS displayed a remarkable improvement compared with TH: the coefficient of thermal expansion (CTE) showed a reduction of 8.6% while the thermal conductivity increased from 18.6 to 41.5 W/m K.
学科主题	Materials Science, Ceramics
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000424716700028
资助机构	Financial support from National Natural Science Foundation of China (No. 51602325), (No. 51572276), Youth Innovation Promotion Association (CAS), Science Foundation for Youth Scholar of State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics Chinese Academy of Sciences(SKL201602), Scientific and Technological Innovation Project of Shanghai Institute of Ceramics are gratefully acknowledged. Buhao Zhang is grateful to Shuxing Li and Junjun Chen for their assistance in the writing of this manuscript. ; Financial support from National Natural Science Foundation of China (No. 51602325), (No. 51572276), Youth Innovation Promotion Association (CAS), Science Foundation for Youth Scholar of State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics Chinese Academy of Sciences(SKL201602), Scientific and Technological Innovation Project of Shanghai Institute of Ceramics are gratefully acknowledged. Buhao Zhang is grateful to Shuxing Li and Junjun Chen for their assistance in the writing of this manuscript.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25064]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Bur Major R&D Programs, Beijing 100864, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Buhao,Yin, Jie,Chen, Jian,et al. Pressureless densification, microstructure tailoring and properties of Ta0.8Hf0.2C-based composites[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2018,38(4):1227, 1236.
APA	Zhang, Buhao,Yin, Jie,Chen, Jian,Huang, Yihua,Liu, Xuejian,&Huang, Zhengren.(2018).Pressureless densification, microstructure tailoring and properties of Ta0.8Hf0.2C-based composites.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,38(4),1227.
MLA	Zhang, Buhao,et al."Pressureless densification, microstructure tailoring and properties of Ta0.8Hf0.2C-based composites".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38.4(2018):1227.