An inverse Hall-Petch behavior and improving toughness in translucent nanocrystalline high-entropy zirconate ceramic. Issue 4 (April 2023)

• Record Type: Journal Article
• Authors: Deng, Mao; Huang, Zhangyi; Guo, Wanying; Shi, Yang; Duan, Junjing; Qi, Jianqi; Wang, Haomin
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 4(2023)
• Page Start: 1746
• Page End: 1750
• Publication Date: 2023-04
• Subjects: High-entropy ceramic -- Zirconate -- Nano-crystalline -- Inverse Hall-Petch -- Hardness; 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.2022.11.052
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Short-range order is a new strengthening effect that can significantly affect the mechanical properties of high-entropy materials. Furthermore, simulation results show that this strengthening effect at a quasi-atomic scale can suppress the grain size softening, leading to the disappearance of inverse Hall-Petch behavior in nanocrystalline high-entropy materials. In this work, the evident inverse Hall-Petch behavior is confirmed in the translucent nanocrystalline high-entropy ceramic (HEC) with an average grain size below 10 nm, fabricated by a high-pressure low-temperature sintering technique. Besides, the as-obtained nanocrystalline HEC also shows an improving fracture toughness compared with the corresponding coarse-crystalline HEC.