Improved mechanical properties and fracture mechanism of C/C composites with salt treatment monitored by synchrotron-based in-situ tensile XRD

doi:10.1016/j.compositesb.2020.108274

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Improved mechanical properties and fracture mechanism of C/C composites with salt treatment monitored by synchrotron-based in-situ tensile XRD
	Feng, SL ; Yang, YG ; Wang, JM ; Wang, Y ; Zhou, XT
刊名	COMPOSITES PART B-ENGINEERING
	2020
卷号	199 页码:-
关键词	PEROVSKITE SOLAR-CELLS CARBON MATRIX MICROSTRUCTURE GRAPHITE BEHAVIOR FIBER IMPACT
ISSN号	1359-8368
DOI	10.1016/j.compositesb.2020.108274
文献子类	期刊论文
英文摘要	Due to the excellent mechanical and thermal properties, carbon fiber reinforced carbon matrix (C/C) composites have been used for wide applications in wear devices, aerospace, and nuclear reactor. Microstructure optimization is a critical way for obtaining a champion C/C composite. Based on the synchrotron-based tensile X-ray diffraction (XRD), we performed an in-situ observation of how microstructure of C/C composite responds to molten salt (FLiNaK) and applied load, a field where current study is limited, helping to reveal the actual microstructure evolution induced by the salt during applied load process. Molten salt impregnation in C/C composites can increase the microstructure stability of graphite and extend their structure relaxation process due to the synthetic interaction between applied load stress and salt squeeze. Notably, fractures of both composites are mainly due to a higher crystallographic strain shrinkage behavior along the tensile direction. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of fractures observed many F and K elements existence in fibers, leading to the fracture of fibers much difference. The mechanical properties including modulus and hardness of C/C composite are improved simultaneously by salt treatment, which should be attributed to the infiltration of F and K elements into fibers and the changed microstructure towards better-ordered and higher-crystalline graphite. These present results would facilitate to understand the mechanism of improved mechanical properties of C/C composite induced by salt, therefore promoting the reliable and safe operation of graphite class material at a wide field.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32923]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jialuo Rd, Shanghai 201800, Peoples R China 3.Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai Synchrotron Radiat Facil, 239 Zhangheng Rd, Shanghai 201204, Peoples R China 4.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Feng, SL,Yang, YG,Wang, JM,et al. Improved mechanical properties and fracture mechanism of C/C composites with salt treatment monitored by synchrotron-based in-situ tensile XRD[J]. COMPOSITES PART B-ENGINEERING,2020,199:-.
APA	Feng, SL,Yang, YG,Wang, JM,Wang, Y,&Zhou, XT.(2020).Improved mechanical properties and fracture mechanism of C/C composites with salt treatment monitored by synchrotron-based in-situ tensile XRD.COMPOSITES PART B-ENGINEERING,199,-.
MLA	Feng, SL,et al."Improved mechanical properties and fracture mechanism of C/C composites with salt treatment monitored by synchrotron-based in-situ tensile XRD".COMPOSITES PART B-ENGINEERING 199(2020):-.