期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 36, 期 7, 页码 1581-1587出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.01.032
关键词
Hafnium carbide coating; UHTC protective layer; Protection of carbon composite; Vacuum plasma spray coating
资金
- National Research Foundation of Korea grant - Ministry of Science, ICT and Future Planning of the Republic of Korea [NRF-2013M1A7A1A01043736, NRF-2014M1A3A3A03066611]
- R&D Program from Dai-Yang Industry Co.
- National Research Foundation of Korea [2014M1A3A3A03066611, 2013M1A7A1A01043736] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A pure hafnium-carbide (HfC) coating layer was deposited onto carbon/carbon (CC) composites using a vacuum plasma spray system (VPS). By introducing a SiC buffer layer, we successfully integrated C.C composites with a 110-mu m-thick protective coating layer of HfC. Compared to the conventional chemical vapor deposition process, the HfC coating process by VPS showed increments in the growth rate, thickness, and hardness. The growth behavior and morphology of HfC coatings were investigated by FE-SEM, EDX, and XRD. In addition, the thermal ablation test results showed that the HfC coating layer perfectly protected the C.C layer from thermal ablation and oxidation. Consequently, we expect that this ultra-high temperature ceramic coating method, and the subsequent microstructure that it creates, can be widely applied to improve the thermal shock and oxidation resistance of materials under ultra-high temperature environments. (C) 2016 Elsevier Ltd. All rights reserved.
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