Synthesis and thermal stability of novel high-entropy metal boron carbonitride ceramic powders

被引：18

作者：

Guan, Jingyi ^{[1
,2
]}

Li, Daxin ^{[1
,2
]}

Yang, Zhihua ^{[1
,2
,3
]}

Wang, Bingzhu ^{[1
,2
]}

Cai, Delong ^{[1
,2
]}

Duan, Xiaoming ^{[1
,2
,3
]}

He, Peigang ^{[1
,2
]}

Jia, Dechang ^{[1
,2
,3
]}

Zhou, Yu ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Inst Adv Ceram, Sch Mat Sci & Engn, Harbin 15000, Peoples R China

[2] Harbin Inst Technol, Key Lab Adv Struct Funct Integrat Mat & Green Mfg, Harbin 150001, Peoples R China

[3] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 17期

基金：

中国博士后科学基金;

关键词：

High-entropy ceramics; Solid solutions; Mechanical alloying; Thermal stability; HIGH TEMPERATURE CERAMICS; MECHANICAL-PROPERTIES; CARBIDE;

D O I：

10.1016/j.ceramint.2020.07.126

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：

High-entropy metal boron carbonitride ceramic powders including (Ta0.2Nb0.2Zr0.2Hf0.2W0.2)BCN, (Ta0.2Nb0.2Zr0.2Hf0.2Ti0.2)BCN, and (Ta0.2Nb0.2Zr0.2Ti0.2W0.2)BCN, were successfully synthesized via mechanical alloying at room temperature. Results show that for the first step of 10 h milling, the amorphous BCN phases are observed. After 24 h of second step milling, the as-synthesized high-entropy ceramics exhibit a single face-centered cubic solid solution structure with high compositional uniformity from nano-scale to micron-scale. When heated to 1500 degrees C for 30min in flowing Ar, the as-prepared high-entropy ceramic powders still show relatively high thermal stability; however, some metals oxides like HfO2 and ZrO2 are detected due to the pre-existing oxides on sample surfaces. After heat treatment, some amorphous phases are still retained. This work suggests a new processing route on the synthesis of high-entropy metal boron carbonitride ceramics.

引用

页码：26581 / 26589

页数：9

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