corrosion behaviour of sintered ndfeb deposited with an aluminium coating
corrosion behaviour of sintered ndfeb deposited with an aluminium coating
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DOI：
10.1016/j.corsci.2011.02.006
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发表时间：
2011-05
影响因子：
8.3
通讯作者：
S. Mao;Heng Yang;Zhenlun Song;Jinlong Li;H. Ying;Kefei Sun
中科院分区：
文献类型：
--
作者：
S. Mao;Heng Yang;Zhenlun Song;Jinlong Li;H. Ying;Kefei Sun
采用直流磁控溅射方法在烧结NdFeB磁体上沉积了纯Al保护层。采用电弧炉熔炼法制备了单相的NdFeB烧结材料(富Nd相、富B相和基质相)，并进行了开路电位测试。实验研究了包覆Al(Al/NdFeB)的烧结NdFeB磁体的腐蚀过程。结果表明，腐蚀过程可分为三个不同的阶段。Al涂层不能为烧结NdFeB磁体提供完全的牺牲保护。
A protective, pure Al coating was deposited by direct current (DC) magnetron sputtering onto sintered NdFeB magnets. Separated, single phases of sintered NdFeB (the Nd-rich phase, the B-rich phase and the matrix phase) were prepared by arc melting for open circuit potential (OCP) tests. The corrosion process of the sintered NdFeB magnets coated with Al (Al/NdFeB) was studied experimentally. It was found that the corrosion process can be divided into three different stages. The Al coating cannot provide complete sacrificial protection for the sintered NdFeB magnets.