Ablation behavior of (Hf–Ta–Zr–Nb–Ti)C high‐entropy carbide and (Hf–Ta–Zr–Nb–Ti)C–xSiC composites. Issue 10 (23rd June 2022)

• Record Type: Journal Article
• Authors: Wang, Yichen; Yu, Duo; Yin, Jie; Zhang, Buhao; Zhang, Hangfeng; Liu, Xuejian; An, Yulong; Reece, Michael J.; Huang, Zhengren
• Is Part Of: Journal of the American Ceramic Society. Volume 105:Issue 10(2022)
• Page Start: 6395
• Page End: 6406
• Publication Date: 2022-06-23
• Subjects: ablation resistance -- high‐entropy carbides -- transition metal carbides -- ultrahigh‐temperature ceramics; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.18620
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: The ablation behavior of (Hf–Ta–Zr–Nb–Ti)C high‐entropy carbide (HEC‐0) was investigated using a plasma flame in air for different times (60, 90, and 120 s) at about 2100°C. The effect of SiC content on the ablation resistance of HEC– x SiC composites ( x = 10 and 20 vol%) was also studied. The linear ablation rate of HEC‐0 decreases with increasing ablation time, showing the positive role of the oxide layer with a complex composition. The linear ablation rate of HEC–10 vol% SiC (0.3 µm s −1 ) is only a 10th of that of HEC‐0, showing a significant improvement in ablation resistance, probably due to the formation of a protective oxide layer containing melted SiO2 and refractory Hf–Zr–Si–O oxides.