Electrical percolation and infrared emissivity of pressureless sintered SiC-MoSi2 composites tailored by sintering temperature

doi:10.1016/j.jeurceramsoc.2019.05.019

	Electrical percolation and infrared emissivity of pressureless sintered SiC-MoSi2 composites tailored by sintering temperature
	Zheng, Jia-Qi; Chen, Jian; zhang, Bu-Hao; Liu, Xue-Jian; Chen, Zhong-Ming; Wu, Hai-Bo; Huang, Zheng-Ren
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2019-11-01
卷号	39 期号:14 页码:3981
关键词	Silicon carbide Molybdenum disilicide Electrical percolation Grain boundary Sintering temperature
ISSN号	0955-2219
DOI	10.1016/j.jeurceramsoc.2019.05.019
文献子类	Article
英文摘要	SiC-MoSi2 composites with low electrical resistivity and high infrared emissivity were fabricated via pressureless sintering. The relationship between microstructure evolution and electrical behaviors along with infrared emission properties of the resulting composites is investigated at various sintering temperatures. The electrical resistivity undergoes two significant drops with increasing sintering temperature. Pore elimination bears responsible for the initial decrease in electrical resistivity. Transmission electron microscopy (TEM) observation manifests that the thinned amorphous layers at SiC/MoSi2 interface decrease grain boundary resistivity and allow for electrical percolation to occur when sintering temperature further rises. Additionally, increasing sintering temperature leads to a higher infrared emissivity owing to the formation of Mo4.8Si3C0.6 and the decreased boundaries. The lowest electrical resistivity of 7.2 Omega cm and the highest infrared emissivity of 0.721 are recorded for composite sintered at 2000 degrees C. Overall, SiC-MoSi2 composites exhibit a promising prospect as infrared source elements that must endure harsh environments.
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26755]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Zheng, Jia-Qi,Chen, Jian,zhang, Bu-Hao,et al. Electrical percolation and infrared emissivity of pressureless sintered SiC-MoSi2 composites tailored by sintering temperature[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(14):3981.
APA	Zheng, Jia-Qi.,Chen, Jian.,zhang, Bu-Hao.,Liu, Xue-Jian.,Chen, Zhong-Ming.,...&Huang, Zheng-Ren.(2019).Electrical percolation and infrared emissivity of pressureless sintered SiC-MoSi2 composites tailored by sintering temperature.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(14),3981.
MLA	Zheng, Jia-Qi,et al."Electrical percolation and infrared emissivity of pressureless sintered SiC-MoSi2 composites tailored by sintering temperature".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.14(2019):3981.