An inverse Hall-Petch behavior and improving toughness in translucent nanocrystalline high-entropy zirconate ceramic

被引：14

作者：

Deng, Mao ^{[1
,2
]}

Huang, Zhangyi ^{[2
]}

Guo, Wanying ^{[1
,2
]}

Shi, Yang ^{[1
,2
]}

Duan, Junjing ^{[3
,4
]}

Qi, Jianqi ^{[3
,4
]}

Wang, Haomin ^{[2
]}

机构：

[1] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China

[2] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China

[3] Sichuan Univ, Coll Phys, Chengdu 610064, Peoples R China

[4] Sichuan Univ, Key Lab Radiat Phys & Technol, Minist Educ, Chengdu 610064, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2023年 / 43卷 / 04期

基金：

中国国家自然科学基金;

关键词：

High -entropy ceramic; Zirconate; Nano; -crystalline; Inverse Hall-Petch; Hardness; HIGH-PRESSURE; GRAIN-SIZE; DENSIFICATION;

D O I：

10.1016/j.jeurceramsoc.2022.11.052

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 nano -crystalline 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.

引用

页码：1746 / 1750

页数：5

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