Effect of solid oxidation products on the ablation mechanisms of ZrC and HfC based coatings above 2000°C

Yixiang Xu; Xiaohui Pan; Shansong Huang; XueTing Xu; Yaran Niu; Xin Zhong; Xuebin Zheng

Journal of Materials Research and Technology (Jan 2023)

Effect of solid oxidation products on the ablation mechanisms of ZrC and HfC based coatings above 2000°C

Yixiang Xu,
Xiaohui Pan,
Shansong Huang,
XueTing Xu,
Yaran Niu,
Xin Zhong,
Xuebin Zheng

Affiliations

Yixiang Xu: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Xiaohui Pan: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Shansong Huang: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
XueTing Xu: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Yaran Niu: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Xin Zhong: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; Corresponding author.
Xuebin Zheng: Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; Corresponding author.

Journal volume & issue: Vol. 22
pp. 1900 – 1910

Abstract

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Solid and liquid oxidation products have been considered to be the key issues to influence the ablation resistance of UHTCs coatings. However, the effect of solid oxidation products on the ablation performance is not clear. In the present work, four kinds of UHTCs coatings (ZrC, ZrC-30vol.%SiC, HfC, HfC-30vol.%SiC) were selected to study the effect of different solid oxides on the ablation behaviors of UHTCs coatings. The results showed that the HfC-based coatings had thinner oxide scale and SiC-depleted layer, which shown better ablation resistance than the ZrC-based coatings. Based on the characterization of oxygen vacancy and density functional theory (DFT) calculation, it is thought that the solid oxidation products of HfO2 possesses higher defect formation energy compared with ZrO2, which can help to restrain the diffusion of oxygen and contribute to the better ablation resistance.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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