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http://dx.doi.org/10.7234/composres.2020.33.4.205

A Study on Improvement of the Ablation Resistance of Two Types of the Carbon/Carbon Composites by HfC Coating  

Kang, Bo-Ram (High-enthalpy Plasma Research Center, Jeonbuk National University)
Kim, Ho-Seok (High-enthalpy Plasma Research Center, Jeonbuk National University)
Oh, Phil-Yong (High-enthalpy Plasma Research Center, Jeonbuk National University)
Choi, Seong-Man (High-enthalpy Plasma Research Center, Jeonbuk National University)
Publication Information
Composites Research / v.33, no.4, 2020 , pp. 205-212 More about this Journal
Abstract
In this study, HfC was coated on two types of carbon/carbon composites coated with SiC by vacuum plasma spraying(VPS). The experiment was performed using a plasma wind tunnel with heat flux of 5.06 MW/㎡ for 120 s heat flux before and after the coating. The mass ablation rate was calculated through the mass change before and after the test, and the length change was measured by using calipers and high speed camera. The oxidation/ablation behavior were observed by FE-SEM with EDS analysis of the specimens cross section. The plasma wind tunnel test results showed that the coated specimens had low weight loss and length change, and high oxidation/ablation resistance. However, two types of the specimens tested under the same conditions were different in the ablation behavior and ablation rate, and it was evaluated that the cylindrical type had higher oxidation/ablation resistance.
Keywords
Vacuum plasma spraying; Plasma wind tunnel testing; Oxidation; Ablation;
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Times Cited By KSCI : 4  (Citation Analysis)
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