Deposition kinetics and mechanism of pyrocarbon for electromagnetic-coupling chemical vapor infiltration process

doi:10.1016/j.jmst.2021.06.020

IMR OpenIR

	Deposition kinetics and mechanism of pyrocarbon for electromagnetic-coupling chemical vapor infiltration process
	Hu, Chenglong 1; Zhao, Rida 1,2; Ali, Sajjad 1,3; Wang, Yuanhong 4; Pang, Shengyang 1; Li, Jian 1; Tang, Sufang 1
通讯作者	Tang, Sufang(sftang@imr.ac.cn)
	2022-02-28
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	101 页码:118-127
摘要	Although the electromagnetic-coupling chemical vapor infiltration (E-CVI) has been proven of a high efficiency technique for producing carbon fiber reinforced pyrocarbon (PyC) matrix (C/C) composites, a deep understanding of the deposition kinetics and mechanism of PyC matrix is still lack. In this work, a deposition model with uniform electric field but gradient magnetic field was set up by using unidirectional carbon fiber bundles as the substrates to investigate the deposition kinetics and mechanism. Meanwhile, the polarizability, and the chemical adsorption and dehydrogenation barriers of hydrocarbon were simulated based on the density functional theory (DFT) and the Climb-image nudged elastic band method, respectively. The E-CVI process exhibited extremely high PyC deposition rates of 8.7, 11.5, 16.5 and 22.7 nm/s at 700, 750, 800 and 850 degrees C, respectively, together with a significantly low apparent activation energy of 57.9 kJ/mol within the first 5 min. The PyC deposited at different temperatures with different time shows a smooth laminar structure with low coherent length and graphitization degree. The theoretical calculation and simulation results indicated that the electrons existing on the carbon fibers and the accelerated motion of radicals with preferred orientation forced by the derived magnetic field have reduced the energy barrier for the deposition process, thereby resulting in low apparent activation energy and high PyC deposition rate. The results of this work may shed a light on how to better direct the preparation of C/C composites by E-CVI process with high quality and efficiency. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Electromagnetic-coupling chemical vapor infiltration CVI C C composites Deposition mechanism
资助者	National Key R&D Program of China ; National Natural Science Foundations of China ; National Science and Technology Major Project ; Liaoning Revitalization Talents Program ; Research Fund of Youth Innovation Promotion Association of CAS, China
DOI	10.1016/j.jmst.2021.06.020
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2018YFF01013600] ; National Natural Science Foundations of China[U1537204] ; National Natural Science Foundations of China[U20A20242] ; National Natural Science Foundations of China[52022101] ; National Natural Science Foundations of China[51802313] ; National Natural Science Foundations of China[51902315] ; National Science and Technology Major Project[2017-VI-0 020-0 093] ; Liaoning Revitalization Talents Program ; Research Fund of Youth Innovation Promotion Association of CAS, China[Y201830] ; Research Fund of Youth Innovation Promotion Association of CAS, China[2021190]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000766632400004
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173217
专题	中国科学院金属研究所
通讯作者	Tang, Sufang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China 4.China Aerosp Sci & Ind Corp, Res Inst 31, Beijing 100074, Peoples R China
推荐引用方式 GB/T 7714	Hu, Chenglong,Zhao, Rida,Ali, Sajjad,et al. Deposition kinetics and mechanism of pyrocarbon for electromagnetic-coupling chemical vapor infiltration process[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,101:118-127.
APA	Hu, Chenglong.,Zhao, Rida.,Ali, Sajjad.,Wang, Yuanhong.,Pang, Shengyang.,...&Tang, Sufang.(2022).Deposition kinetics and mechanism of pyrocarbon for electromagnetic-coupling chemical vapor infiltration process.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,101,118-127.
MLA	Hu, Chenglong,et al."Deposition kinetics and mechanism of pyrocarbon for electromagnetic-coupling chemical vapor infiltration process".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 101(2022):118-127.