A novel strategy for rapid fabrication of continuous carbon fiber reinforced (TiZrHfNbTa)C high-entropy ceramic composites: High-entropy alloy in-situ reactive melt infiltration. Issue 6 (June 2023)

• Record Type: Journal Article
• Authors: Guo, Wenjian; Hu, Jian; Fang, Wu; Ye, Yicong; Zhang, Shifeng; Bai, Shuxin
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 6(2023)
• Page Start: 2295
• Page End: 2305
• Publication Date: 2023-06
• Subjects: High-entropy ceramic -- Composite -- Reactive melt infiltration -- Microstructure -- Ablative resistance; 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.2023.01.019
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: For the first time, dense continuous carbon fiber (Cf ) reinforced (TiZrHfNbTa)C high-entropy ceramic (Cf /HEC) composites were rapidly prepared via in-situ reactive melt infiltration (RMI). A TiZrHfNbTa high-entropy alloy served as the cation source and carbon in Cf reinforced carbon matrix (Cf /C) preforms served as the anion source, and a (TiZrHfNbTa)C high-entropy ceramic phase with a near equimolar ratio was successfully formed. The results revealed that most of the TiZrHfNbTa high-entropy alloy reacted with the carbon matrix, and the harvested Cf /HEC composites exhibited an excellent bending strength (612.6 MPa) and low ablation rates. High reaction rates caused by ultra-high temperature and homogeneous distribution of elements in the high-entropy TiZrHfNbTa alloy significantly reduced the difference in reactivity with C among Ti, Zr, Hf, Nb, and Ta are considered to be the reasons for successful formation of (TiZrHfNbTa)C high-entropy ceramic with a near equimolar ratio in Cf /HEC composites.