Corrosion properties of aluminium coatings deposited on sintered NdFeB by ion-beam-assisted deposition

被引：44
|
作者：
Mao, Shoudong [1 ]
Yang, Hengxiu [1 ]
Li, Jinlong [1 ]
Huang, Feng [1 ]
Song, Zhenlun [1 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 13期
关键词：
NdFeB; Aluminium coatings; Magnetron sputtering; IBAD; Corrosion resistance; FE-B MAGNET; PERMANENT-MAGNETS; STAINLESS-STEEL; THIN-FILMS; ND; PROTECTION; RESISTANCE; BEHAVIOR; ALLOYS; AL;
D O I：
10.1016/j.apsusc.2011.01.049
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pure Al coatings were deposited by direct current (DC) magnetron sputtering to protect sintered NdFeB magnets. The effects of Ar+ ion-beam-assisted deposition (IBAD) on the structure and the corrosion behaviour of Al coatings were investigated. The Al coating prepared by DC magnetron sputtering with IBAD (IBAD-Al-coating) had fewer voids than the coating without IBAD (Al-coating). The corrosion behaviour of the Al-coated NdFeB specimens was investigated by potentiodynamic polarisation, a neutral salt spray (NSS) test, and electrochemical impedance spectroscopy (EIS). The pitting corrosion of the Al coatings always began at the voids of the grain boundaries. Bombardment by the Ar+ ion-beams effectively improved the corrosion resistance of the IBAD-Al-coating. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：5581 / 5585
页数：5
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