Preparation and Corrosion Behavior of Sintered NdFeB Magnets Coated with Densified- Ni Coatings

被引：0

作者：

Zhang Pengjie ^{[1
,2
,3
,4
]}

Liu Qing ^{[4
]}

Sun Wei ^{[1
,2
,3
]}

Li Bingshan ^{[2
,3
]}

Cao Yujie ^{[1
,2
,3
]}

Tang Dawei ^{[1
,2
,3
]}

Xu Guangqing ^{[4
]}

Wei Hanzhong ^{[1
,2
,3
]}

Xie Guanghuan ^{[1
,2
,3
]}

Wang Jiquan ^{[1
,2
,3
]}

Liu Hui ^{[2
,3
]}

Wang Yongqi ^{[2
,3
]}

Li Yafeng ^{[2
,3
]}

Wang Qian ^{[2
,3
]}

机构：

[1] BGRIMM Magnet Mat & Technol Fuyang Co Ltd, Fuyang 236000, Peoples R China

[2] Natl Engn Res Ctr Magnet Mat, Beijing 102600, Peoples R China

[3] Gen Res Inst Min & Met, Beijing 102600, Peoples R China

[4] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2022年 / 51卷 / 08期

关键词：

sintered NdFeB; densified-Ni coatings; Vickers hardness; corrosion behavior; FE-B MAGNETS; ELECTRODEPOSITION; ELECTROCATALYSTS; MICROSTRUCTURE; EVOLUTION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The densified-Ni coating on sintered NdFeB magnets was prepared by high-energy ball milling method. The film/substrate bonding strength and Vickers hardness of densified-Ni coating were tested. The corrosion resistance of the specimens was studied by neutral salt spray test and high temperature PCT test. The corrosion process of the magnets was further analyzed by static full immersion test. The results show that the Ni coating on the magnet surface could be densified by ball milling process. The microhardness of Ni-D24/NdFeB magnet increases from 4193.9 MPa to 4926.2 MPa and the binding strength increases from 16.30 MPa to 23.85 MPa after 400 r/min and 24 h ball milling, which indicates better mechanical damage resistance. The self-corrosion current density of the coating reduces by one order of magnitude compared with that of Ni/NdFeB magnet, and the resistance time to neutral salt spray increases from 312 h to 480 h, showing better corrosion resistance.

引用

页码：2863 / 2869

页数：7

共 21 条

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