Effects of Al2O3 coating induced structural and mechanical changes of C/C composites

doi:10.1016/j.jallcom.2019.152847

	Effects of Al2O3 coating induced structural and mechanical changes of C/C composites
	Jia, Jiangang1,2 ; Zhang, Bo 1; Liu, Diqiang 1; Liu, Shunwei 1; Ji, Genshun 2; Ji, Ruifang 1
	2020-03-25
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	818
摘要	Different C/C composites, identified as C-f/C, C-Al2O3/C, C-1600/C and C1600-Al2O3/C, were fabricated by condensation of different treated 3D needle-punched carbon fiber preforms through a thermal gradient chemical vapor infiltration (TG-CVI) method. Effects of high temperature treatment and Al2O3 coating of the carbon fiber preforms on matrix texture and mechanical properties of C/C composites were investigated. SL PyC is obtained for C-f/C and C-1600/C, which preforms are without Al2O3 coating. Whereas the texture of carbon matrix for C-Al2O3/C, and C1600-Al2O3/C changes to RL under the same deposition conditions, indicating that Al2O3 coating layer significantly affects the texture of carbon matrix. Heat treatment of the carbon fiber preforms at 1600 degrees C for 4 h obviously increase the toughness of the C/C composites. The fracture toughness increased by 226% from 0.938 MPa/m(2) for C-f/C to 3.061 MPa/m(2) for C1600-Al2O3/C. The significant toughness increasing is attributed to the unique fracture mode for C1600-Al2O3/C, where a hollow "cylindrical" PyC matrix is pulled out and a corresponding big hole is left with a central fiber in it. The flexural strength, however, is mainly affected by the final density of the C/C composites. (C) 2019 Elsevier B.V. All rights reserved.
关键词	C/C composites Interface coating layer Al2O3 Matrix texture Fracture toughness
DOI	10.1016/j.jallcom.2019.152847
收录类别	SCI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China[51461029] ; Gansu Province science and technology major projects[1602GKDD012]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000506166900046
出版者	ELSEVIER SCIENCE SA
EI入藏号	20194807738940
EI主题词	Fracture toughness
EI分类号	415.4 Structural Materials Other Than Metal, Plastics or Wood - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 813.2 Coating Materials
来源库	WOS
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64142
专题	材料科学与工程学院
通讯作者	Jia, Jiangang
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 2.State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
第一作者单位	材料科学与工程学院
通讯作者单位	材料科学与工程学院
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Jia, Jiangang,Zhang, Bo,Liu, Diqiang,et al. Effects of Al2O3 coating induced structural and mechanical changes of C/C composites[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,818.
APA	Jia, Jiangang,Zhang, Bo,Liu, Diqiang,Liu, Shunwei,Ji, Genshun,&Ji, Ruifang.(2020).Effects of Al2O3 coating induced structural and mechanical changes of C/C composites.JOURNAL OF ALLOYS AND COMPOUNDS,818.
MLA	Jia, Jiangang,et al."Effects of Al2O3 coating induced structural and mechanical changes of C/C composites".JOURNAL OF ALLOYS AND COMPOUNDS 818(2020).