Microstructure and thermal conductivity of fully ceramic microencapsulated fuel fabricated by spark plasma sintering

doi:10.1111/jace.15585

	Microstructure and thermal conductivity of fully ceramic microencapsulated fuel fabricated by spark plasma sintering
	Cao, Fangcheng 1; Fan, Xiaohui 1; Liu, Bing 2; Zhao, Xiaofeng 1; Guo, Fangwei 1; Xiao, Ping 1,3
刊名	Journal of the American Ceramic Society
	2018
卷号	101 期号:9 页码:4224-4236
ISSN号	00027820
DOI	10.1111/jace.15585
英文摘要	Fully ceramic microencapsulated pellet (FCM), consisting of tristructural isotropic (TRISO) particles embedded in silicon carbide (SiC) matrix, was fabricated using spark plasma sintering. The parameters affecting the densification of SiC matrix were first investigated, and then FCM pellets were prepared using TRISO particles with/without outer pyrolytic carbon (OPyC) layer. Effects of thermal exposure on the TRISO particles during SPS were evaluated. In addition, the thermal condcutvitities of FCM pellet, as well as the SiC matrix, were measured using laser flash. It was revealed that the TRISO particles with OPyC layers significantly lower the thermal conductivity of FCM pellet. Based on Maxwell-Eucken model, the predicted effective thermal conductivities of TRISO particles with/without OPyC layers were 14.4 W/m K and 25.2 W/m K, respectively. Finite elements simulation indicated that the SiC layer in TRISO particle plays a dominant role on the thermal conductivity of FCM. The presence of OPyC layers would generate gaps/porous SiC near the interface and resist the heat flows, leading to a lower thermal conductivity of FCM. © 2018 The American Ceramic Society
出版者	Blackwell Publishing Inc.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25292]
专题	中国科学院上海硅酸盐研究所
作者单位	1.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; 2.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; 3.School of Materials, University of Manchester, Manchester, United Kingdom
推荐引用方式 GB/T 7714	Cao, Fangcheng,Fan, Xiaohui,Liu, Bing,et al. Microstructure and thermal conductivity of fully ceramic microencapsulated fuel fabricated by spark plasma sintering[J]. Journal of the American Ceramic Society,2018,101(9):4224-4236.
APA	Cao, Fangcheng,Fan, Xiaohui,Liu, Bing,Zhao, Xiaofeng,Guo, Fangwei,&Xiao, Ping.(2018).Microstructure and thermal conductivity of fully ceramic microencapsulated fuel fabricated by spark plasma sintering.Journal of the American Ceramic Society,101(9),4224-4236.
MLA	Cao, Fangcheng,et al."Microstructure and thermal conductivity of fully ceramic microencapsulated fuel fabricated by spark plasma sintering".Journal of the American Ceramic Society 101.9(2018):4224-4236.