Hafnium carbide protective layer coatings on carbon/carbon composites deposited with a vacuum plasma spray coating method. Issue 7 (June 2016)

• Record Type: Journal Article
• Authors: Yoo, Hee-Il; Kim, Ho Seok; Hong, Bong Guen; Sihn, Ihn-Cheol; Lim, Kwang-Hyeon; Lim, Byung-Joo; Moon, Se Youn
• Is Part Of: Journal of the European Ceramic Society. Volume 36:Issue 7(2016:)
• Page Start: 1581
• Page End: 1587
• Publication Date: 2016-06
• Subjects: Hafnium carbide coating -- UHTC protective layer -- Protection of carbon composite -- Vacuum plasma spray coating; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2016.01.032
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: A pure hafnium-carbide (HfC) coating layer was deposited onto carbon/carbon (C.C) composites using a vacuum plasma spray system (VPS). By introducing a SiC buffer layer, we successfully integrated C.C composites with a 110-μm-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.