Metal deficient AlB2-type(Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)1-6B2 high-entropy diborides with high hardness

被引：1

作者：

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

Zhu, Qinqing ^{[1
,2
,3
]}

Xiao, Guorui ^{[2
,3
,4
]}

Ren, Zhi ^{[2
,3
]}

机构：

[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[2] Westlake Univ, Sch Sci, Dept Phys, 18 Shilongshan Rd, Hangzhou 310024, Peoples R China

[3] Westlake Inst Adv Study, Inst Nat Sci, 18 Shilongshan Rd, Hangzhou 310024, Peoples R China

[4] Zhejiang Univ, Sch Phys, Hangzhou 310058, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 03期

关键词：

High entropy diborides; AlB2-type; Metal deficiency; Vickers hardness; ZR;

D O I：

10.1016/j.ceramint.2022.11.100

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：

We report the synthesis and characterization of metal deficient (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)1-6B2 high-entropy diborides (HEBs). A single homogeneous AlB2-type phase is successfully obtained over the 6 range of 0.03 <= 6 <= 0.18. With increasing 6, the unit-cell volume exhibits a nonmonotonic variation with a maximum at 6 = 0.07. These metal-deficient HEBs possess high Vickers hardness of 16.6-18.9 GPa at a load of 9.8 N and their phase stability is attributed to the increased mixing entropy. Our results not only present the first series of metal-deficient AlB2-type HEBs, but also suggest the existence of similar multicomponent diborides.

引用

页码：5522 / 5526

页数：5

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