Liquid Phase Vaporization TG-CVI Method Prepared C/C Composites: Microstructure and Properties

doi:10.11896/cldb.18110188

	Liquid Phase Vaporization TG-CVI Method Prepared C/C Composites: Microstructure and Properties
	Ji, Genshun 1,3; Chen, Xiaolong 1,3; Jia, Jiangang 1,3; Li, Xiaolong 1; Gong, Jingbo 1; Hao, Xiangzhong 2
刊名	Cailiao Daobao/Materials Reports
	2020-01-25
卷号	34 期号:1 页码:02029-02033
关键词	Bending strength Crystal structure Crystallites Fracture Fracture toughness Graphite Graphitization Heat treatment Liquids Morphology Phase structure Preforming Scanning electron microscopy Vaporization C/C composites Densification rate Fracture morphology High temperature heat treatment Microstructure and properties Pseudo plastic fracture Pyrolytic carbon Universal testing machines
ISSN号	1005023X
DOI	10.11896/cldb.18110188
英文摘要	For the sake of improving the densification rate of C/C composites, a reaction device combining precursor evaporation and pyrolytic carbon deposition was designed, taking cyclohexane as the carbon source precursor and carbon felt as the preform. Rapid preparation of the C/C composites was implemented by liquid phase vaporization TG-CVI and followed by heat treatment on the C/C composites at 2 000 for 2 h. Polarized light microscopy (PLM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) were employed to characterize the microstructure, fracture morphology, phase structure and crystallization degree of the C/C composites. Further, the bending strength of the C/C composites was measured by universal testing machine. According to the results, the annular preform with initial density of 0.14 g/cm3 can attain the average density of 1.65 g/cm3 after 20 h long experience under 1 000 and 20 kPa. A 0.075 5 g•cm-3•h-1 densification rate of liquid phase vaporization TG-CVI was achieved, which was nearly an order of magnitude higher than that of conventional ICVI. Rough layer carbon pyrolytic constituted the structure of the C/C composites, and the C/C composites presented a bending strength of about 63.24 MPa, and pseudo-plastic fracture. Undergoing heat treatment at 2 000 for 2 h, there were a phenomenal narrowing in the C(002) plane space, a converting of crystallites structure from chaotic graphite to ideal graphite crystal, and a considerable degree of graphitization in the C/C composites. © 2020, Materials Review Magazine. All right reserved.
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115370]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Technology Center of Gansu Haoshi Carbon Fiber Co.Ltd, Lanzhou; 730010, China 3.Baiyin Research Institute of Novel Materials, Lanzhou University of Technology, Baiyin; 730900, China;
推荐引用方式 GB/T 7714	Ji, Genshun,Chen, Xiaolong,Jia, Jiangang,et al. Liquid Phase Vaporization TG-CVI Method Prepared C/C Composites: Microstructure and Properties[J]. Cailiao Daobao/Materials Reports,2020,34(1):02029-02033.
APA	Ji, Genshun,Chen, Xiaolong,Jia, Jiangang,Li, Xiaolong,Gong, Jingbo,&Hao, Xiangzhong.(2020).Liquid Phase Vaporization TG-CVI Method Prepared C/C Composites: Microstructure and Properties.Cailiao Daobao/Materials Reports,34(1),02029-02033.
MLA	Ji, Genshun,et al."Liquid Phase Vaporization TG-CVI Method Prepared C/C Composites: Microstructure and Properties".Cailiao Daobao/Materials Reports 34.1(2020):02029-02033.