真空烧结时间对铝镍钴永磁材料Cu/Sn涂层组织及磁性能的影响  

Effect of Vacuum Sintering Time on Microstructure and Magnetic Properties of Cu/Sn Coating on AlNiCo Permanent Magnetic Material

作　　者：周晓燕 李冬英 邹利华[2,3] 赵乘麟 李梦奇[2,3] ZHOU Xiao-yan;LI Dong-ying;ZOU Li-hua;ZHAO Cheng-lin;LI Meng-qi(School of Information Engineering,Shaoyang University,Shaoyang 422000,China;School of Mechanical and Energy Engineering,Shaoyang University,Shaoyang 422000,China;Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing,Shaoyang University,Shaoyang 422000,China)

机构地区：[1]邵阳学院信息工程学院,湖南邵阳422000 [2]邵阳学院机械与能源工程学院,湖南邵阳422000 [3]邵阳学院高效动力系统智能制造湖南省重点实验室,湖南邵阳422000

出　　处：《材料保护》2021年第7期117-121,共5页Materials Protection

基　　金：湖南省教育厅重点项目(18A384);湖南省教育厅优秀青年项目(18B421)资助。

摘　　要：为了提高铝镍钴永磁材料表面磁控溅射Cu/Sn涂层的质量,对其进行真空烧结处理,以实现增强结合力并保持较高磁性的目的。采用扫描电镜、万能拉伸机、NIM-2000分析系统考察了真空烧结时间对Cu/Sn涂层的组织、结合力及磁性能的影响。结果表明:真空烧结时间选择1 h的涂层表面质量较优。延长真空烧结时间后,会产生竖状坑结构,并且坑的深度也会不断增加。经过不同时间真空烧结得到了厚度为10~12μm的疏松组织。随着真空烧结时间的延长,Cu/Sn涂层与基体的结合力随之提高,经过1 h真空烧结处理可以形成21.2 MPa的结合力。延长烧结时间后,形成的平滑界面更少,但凹坑数量明显增加。经过更长时间真空烧结处理后,Cu/Sn涂层与基体发生了明显扩散,使表面铁磁组织转变成了较为疏松的结构,导致其矫顽力减小。In order to improve the quality of magnetron sputtering Cu/Sn coating on the surface of AlNiCo permanent magnetic material,the coating was treated by vacuum sintering to achieve the purpose of maintaining high magnetism under the premise of strengthening the bonding force.The influence of vacuum sintering time on the microstructure,bonding strength and magnetic properties of Cu/Sn coating was investigated by SEM,universal tensile machine and NIM-2000 analysis system.Results showed that the coating surface quality was better when vacuum sintering time was 1 h.When the time of vacuum sintering was prolonged,the vertical pit structure would be formed and the pit depth would be increased continuously.After vacuum sintering for different times,loose tissue with thickness between 10~12μm was obtained.When the time of vacuum sintering was prolonged,the binding force between Cu/Sn coating and substrate was also increased.After 1h of vacuum sintering,the binding force reached 21.2 MPa.After increasing the sintering time,the formed smooth interface was less,but the number of pits increased obviously.After the treatment for a longer period of time,the obvious diffusion occurred between the Cu/Sn coating and the matrix,which made the surface ferromagnetic structure transform into a relatively loose structure,resulting in the reduction of coercivity.

关 键 词：铝镍钴 真空烧结时间 Cu/Sn涂层 结合力 微观组织 磁性能 

分 类 号：TG174[金属学及工艺—金属表面处理]