期刊
SURFACE & COATINGS TECHNOLOGY
卷 307, 期 -, 页码 91-98出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2016.08.072
关键词
SiC nanowires; C/C composited; Fracture toughness; Oxidation
资金
- Natural Science Foundation of Jiangsu Province [BK20150727]
- Opening Project of Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology [ASMA201419]
- Scientific Foundation of Nanjing Institute of Technology [YKJ201405]
To improve oxidation resistance of SiC coating, a SiC nanowires-reinforced SiC (SiCNWs-SiC) coating was successfully prepared in-situ by a simple CVD process on carbon/carbon (C/C) composites. The coating could be divided into four layers with different density, but the whole is dense. The fracture toughness and oxidation protection effectiveness of the SiC coating were improved effectively by the nanowires. The test results showed that the fracture toughness of the SiC coating increased from 9.1 MPa m(1/2) to 19.7 MPa m(1/2) after introducing the SiC nanowires (SiCNWs), and the mass loss of the coated C/C composites was only 0.48% after oxidizing at 1637 K for 420 h, whereas the mass loss of pure SiC coated samples was up to 1.48% after oxidizing at 1637 K for 16 h. (C) 2016 Elsevier B.V. All rights reserved.
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