摘要
采用喷涂工艺在烧结钕铁硼磁体表面制备了不同纳米CeO2掺杂量的CeO2/Zn-Al复合涂层。利用扫描电子显微镜、显微硬度仪、盐雾试验箱和电化学工作站对CeO2/Zn-Al复合涂层的微观结构、力学性能及耐腐蚀性能进行表征分析。结果表明:CeO2纳米颗粒较均匀弥散分布于Zn-Al涂层中,不仅能够增加Zn-Al涂层的硬度,而且可以提高Zn-Al涂层的屏蔽性能,CeO2/Zn-Al复合涂层耐中性盐雾试验能力高达720 h。添加的CeO2颗粒能够隔绝Zn-Al涂层中的锌铝薄片之间的直接接触,起到绝缘作用,延长了腐蚀介质渗入钕铁硼基体的腐蚀通道。
CeO2/Zn-Al composite coatings with different contents of CeO2 nanoparticles contents were prepared on the surface of sintered Nd Fe B magnets using spraying technique.The microstructures,mechanical properties,and corrosion resistance of CeO2/Zn-Al coating layers were analyzed by means of scanning electron microscopy(SEM),microhardness tester,neutral salt spray test chamber,and electrochemical workstation.Results show that the introduction of dispersive CeO2 nanoparticles disperse into Zn-Al layer,not only enhances the hardness of Zn-Al coating layer,but also improves the shielding performance of Zn-Al coating layer,and thus the resistance to neutral salt spray test of the CeO2/Zn-Al composite coatings can reach up to 720 h.The addition of CeO2 nanoparticles can act as an insulator to avoid the direct contact between Zn-Al flakes in Zn-Al coating,and prolong the corrosion channel of corrosion medium penetrating into Nd Fe B substrate.
作者
曹玉杰
刘友好
张鹏杰
徐光青
刘家琴
衣晓飞
吴玉程
CAO Yujie;LIU Youhao;ZHANG Pengjie;XU Guangqing;LIU Jiaqin;YI Xiaofei;WU Yucheng(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei University of Technology,Hefei 230009,China;Institute of Industry and Equipment Technology,Hefei University of Technology,Hefei 230009,China;State Key Laboratory of Rare Earth Permanent Magnet Materials,Hefei 231500,China;BGRIMM Magnetic Materials and Technology(Fuyang)Co Ltd,Fuyang 236000,China)
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2020年第6期100-107,共8页
China Surface Engineering
基金
安徽省科技重大专项(18030901098)
安徽省重点研究和开发计划项目(1804a09020068)
北京矿冶科技集团有限公司重点基金项目(20190898000002)
