Potential-current characteristics in SiC/ZrB2 composite ceramics

doi:10.1016/j.jeurceramsoc.2018.01.020

	Potential-current characteristics in SiC/ZrB2 composite ceramics
	Chen, Junjun 1; Chen, Jian ; Chen, Zhongming ; Liu, Xuejian ; Huang, Zhengren ; Huang, Yihua
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2018
卷号	38 期号:6 页码:2477
关键词	Silicon carbide Zirconium diboride Electrical property Electrical percolation
ISSN号	0955-2219
DOI	10.1016/j.jeurceramsoc.2018.01.020
英文摘要	ZrB2/SiC composite ceramics were fabricated to improve the electrical conductive properties of SiC matrix. The debinding and sintering temperatures were determined by computation of Gibbs free energy. As a result, all the samples have the relative density above 99%, and have excellent mechanical and electrical properties. The effects of ZrB2 content on the microstructure, mechanical and electrical properties were systematically studied. With increasing ZrB2 content, as-prepared composites show great improvement in their mechanical properties. Importantly, the introduction of ZrB2 weakened varistor nonlinear characteristic of composite and reduced its resistivity. The reason is the evolution of grain boundary in conductive paths. The sharp decrease of resistivity indicates the formation of percolation paths. The percolation threshold at 1 mA cm(-2) obtained via percolation model is 10.7963 vol% (19.7098 wt%) ZrB2. This value is much less than conventional composites, because the percolation path originates from grain boundary breakdown other than continuous conductor chains.
学科主题	Materials Science, Ceramics
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000427668200002
资助机构	Financial support from National Natural Science Foundation of China (Grant No. 51302288 and Grant No. 51572276), Youth Innovation Promotion Association, CAS is acknowledged, and Natural Science Foundation of Shanghai (No.17ZR1434500). ; Financial support from National Natural Science Foundation of China (Grant No. 51302288 and Grant No. 51572276), Youth Innovation Promotion Association, CAS is acknowledged, and Natural Science Foundation of Shanghai (No.17ZR1434500).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24902]
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, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Junjun,Chen, Jian,Chen, Zhongming,et al. Potential-current characteristics in SiC/ZrB2 composite ceramics[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2018,38(6):2477, 2485.
APA	Chen, Junjun,Chen, Jian,Chen, Zhongming,Liu, Xuejian,Huang, Zhengren,&Huang, Yihua.(2018).Potential-current characteristics in SiC/ZrB2 composite ceramics.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,38(6),2477.
MLA	Chen, Junjun,et al."Potential-current characteristics in SiC/ZrB2 composite ceramics".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38.6(2018):2477.