摘要
为提升烧结NdFeB磁体的耐蚀性,采用旋涂法和等离子体增强化学气相沉积技术在其表面制备Zn-Al/T8(2-全氟辛基乙基丙烯酸酯)超疏水复合涂层。结果表明,Zn-Al涂层主要由片层状的Zn和Al相组成,厚度大约为28μm。Zn-Al/T8复合涂层的接触角达到151.78°,而滚动角仅为5.13°,说明Zn-Al/T8复合涂层可提供一个超疏水表面。Zn-Al涂层和Zn-Al/T8复合涂层对烧结NdFeB的磁性能均无显著影响。Zn-Al涂层通过牺牲阳极来提高NdFeB磁体的耐蚀性,而Zn-Al/T8复合涂层通过超疏水表面进一步提升耐蚀性。Zn-Al/T8复合涂层较Zn-Al涂层具有更好的耐盐雾性能。Zn-Al/T8超疏水复合涂层是一种非常有前途的烧结NdFeB磁体保护涂层。
In order to improve the corrosion resistance,the Zn-Al/T8(2-perfluorooctane ethyl acrylate)super-hydrophobic composite coating was prepared on the sintered NdFeB magnet by spin coating method coupled with plasma-enhanced chemical vapor deposition.The results show that the Zn-Al coating is mainly composed of lamellar Zn and Al phases with the thickness of approximately 28μm.The contact angle of the Zn-Al/T8 coating reaches 151.78°with the rolling angle of 5.13°,indicating that the Zn-Al/T8 coating can provide a superhydrophobic surface.The Zn-Al and Zn-Al/T8 coatings have no significant effect on the magnetic properties of the NdFeB magnets.The Zn-Al coating improves the corrosion resistance of the NdFeB by sacrificing the anode,while the Zn-Al/T8 coating further enhances the corrosion resistance through the superhydrophobic surface.The Zn-Al/T8 composite coating has better salt spray resistance than Zn-Al coating.The Zn-Al/T8 superhydrophobic composite coating is a promising candidate for protecting the sintered NdFeB magnets.
作者
张晓虎
罗军明
徐吉林
陈金
黄俊
马永存
薛名山
Xiao-hu ZHANG;Jun-ming LUO;Ji-in XU;Jin CHEN;Jun HUANG;Yong-cun MA;Ming-shan XUE(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)
基金
National Natural Science Foundation of China(No.52161040)
Major Science and Technology Research and Development Project of Jiangxi Province(No.20203ABC28W006)
Natural Science Foundation of Jiangxi Province,China,(No.20202ACBL214011)
Key Project of"Science and Technology to Promote Mongolian Development",China(No.XM2021BT03)。
