Effects of group-VB transition metals diborides substitution on HfB2-based ceramics

被引：6
|
作者：
Zhou, Yu-Zhang [1 ]
Zhu, Qi-Qi [1 ]
Xu, Liang [1 ]
Guo, Wei-Ming [1 ]
Sun, Shi-Kuan [2 ]
You, Yang [3 ]
Lin, Hua-Tay [1 ]
机构：
[1] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Peoples R China
[2] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China
[3] Changsha Univ, Hunan Key Lab Appl Enviromental Photocatalysis, Changsha 410022, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2023年 / 43卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Hafnium diboride; Solid solution; Mechanical properties; Microstructure; MECHANICAL-PROPERTIES; BOROTHERMAL REDUCTION; HFB2; POWDER; MICROSTRUCTURE; DENSIFICATION; ZRB2; COMPOSITES; NANOCOMPOSITE; REFINEMENT; BEHAVIOR;
D O I：
10.1016/j.jeurceramsoc.2022.10.079
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：
In order to study the effects of solid solution of group-VB (VB=V, Nb and Ta) transition metal diborides on HfB2 ceramics, the particle size, sinterability, microstructure, and mechanical properties of Nb substituted HfB2-based ceramics were investigated, and compared with the reported (Hf,V)B2 and (Hf,Ta)B2 ceramics. The results showed that the solid solution of group-VB transition metal diborides could refine the particle size of powder and improve the densification by spark plasma sintering. This might be related to the solubility of diboride phase in B2O3 liquid phase. With the addition of SiC, no obvious difference of densification could be observed between (Hf,VB)B2-SiC ceramics. Instead, after the substitution of V, Nb and Ta, the hardness of the (Hf,VB)B2-SiC ce-ramics was much improved, alongside the decreasing fracture toughness. The influence on mechanical properties of V, Nb and Ta substitution was discussed in combination of the microstructure analysis.
引用
收藏
页码：739 / 747
页数：9
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