Abstract Titanium has been added in the Al coatings on sintered NdFeB magnets by ion-beam-assisted magnetron sputtering to improve the mechanical properties of coatings without corrosion resistance deterioration. The effect of Ti addition on structure, mechanical and electrochemical properties of Al coatings has been investigated, complemented by x-ray diffraction and transmission electron microscopy. The results show that the ion-beam-assisted magnetron co-sputtering of Al and Ti obtains a single-phase polycrystalline structure of Al–Ti solid solution. With the increasing Ti content, the coating structure becomes denser and the grain size is reduced. Both the mechanical and wear properties of the coatings are improved with the addition of Ti where the hardness of the Al–Ti coating increases with the increasing amount of Ti. Polarization and EIS testing results show that the titanium-doped coatings have an enhanced corrosion resistance by comparison with pure Al coatings when Ti content is lower than 4.3 at.%.

中文翻译：

---

添加钛对离子束辅助磁控溅射钕铁硼铝涂层结构、耐蚀性和力学性能的影响

摘要 通过离子束辅助磁控溅射在烧结钕铁硼磁体的Al涂层中添加钛，以提高涂层的力学性能，同时不降低其耐腐蚀性能。已经研究了 Ti 添加对 Al 涂层的结构、机械和电化学性能的影响，并辅以 X 射线衍射和透射电子显微镜。结果表明，Al和Ti的离子束辅助磁控共溅射获得了Al-Ti固溶体的单相多晶结构。随着Ti含量的增加，涂层组织变得更致密，晶粒尺寸减小。涂层的机械性能和磨损性能都随着 Ti 的加入而得到改善，其中 Al-Ti 涂层的硬度随着 Ti 含量的增加而增加。