烧结NdFeB磁体表面Zn-Al/T8超疏水复合涂层的显微组织及耐蚀性  

Microstructure and corrosion resistance of Zn−Al/T8 superhydrophobic composite coating on sintered NdFeB magnet

作　　者：张晓虎 罗军明[1] 徐吉林[1] 陈金 黄俊[1] 马永存 薛名山[1] 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)

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第5期1606-1617,共12页中国有色金属学报（英文版）

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)。

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.

关 键 词：显微组织 耐蚀性 烧结NDFEB磁体 Zn-Al涂层 超疏水表面 旋涂法 等离子体增强化学气相沉积 

分 类 号：TG178[金属学及工艺—金属表面处理]