Molten salt synthesis of orthorhombic CrB and Cr2AlB2 ceramics

被引：11

作者：

Wang, Ying ^{[1
,2
]}

Yang, Ling Xu ^{[3
]}

Liu, Rui Jia ^{[1
,2
]}

Bu, Huan Peng ^{[3
]}

Mu, Yong Biao ^{[3
]}

Liu, Hui Jun ^{[3
]}

Zeng, Chao Liu ^{[3
]}

Zhu, Sheng Long ^{[1
]}

Fu, Chao ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

[3] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 22期

关键词：

MAB phase; Cr2AlB2; CrB; Molten salt; Electrochemistry; DISPROPORTIONATION REACTION; CHROMIUM BORIDES; REDUCTION; CR3ALB4; MOLYBDENUM; TUNGSTEN; POWDERS; ROUTE;

D O I：

10.1016/j.ceramint.2021.08.059

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-purity and fine CrB powders are firstly synthesized from Cr and B powders in (Na, K)Cl molten salt at 850 degrees C for 2 h. Then the as-achieved CrB powders are used as precursors to synthesize homogeneous and size-controlled Cr2AlB2 powders in (Na, K)Cl molten salt at 900 degrees C for 2 h. Additionally, the formation mechanisms of CrB and Cr2AlB2 in (Na, K)Cl molten salt are also investigated. Results show that the Cr atom, formed by disproportionation of Cr2+ ions in molten salt, reacts in-situ with B powders to form CrB. For the formation of Cr2AlB2, Al and CrB migrate mutually and assemble firstly in the molten salt, and then Al intercalates into CrB to generate Cr2AlB2.

引用

页码：31772 / 31779

页数：8

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