烧结NdFeB永磁体表面TiO2/聚氨酯基复合涂层的制备及耐蚀性研究

材料导报, 2016, 30(10): 57-60. doi: 10.11896/j.issn.1005-023X.2016.10.013

烧结NdFeB永磁体表面TiO2/聚氨酯基复合涂层的制备及耐蚀性研究

徐吉林 ^1, , 张鹏 ^2, , 罗军明 ^3, , 陆磊 ^4, , 钟震晨 ^5,

1.江西省科学院江西省钨铜新材料重点实验室,南昌 330029;南昌航空大学材料学院,南昌 330063

2.南昌航空大学材料学院,南昌,330063

3.南昌航空大学材料学院,南昌,330063

4.江西省科学院江西省钨铜新材料重点实验室,南昌,330029

5.江西理工大学稀土磁性材料及器件研究所,赣州,341000

基金项目: 江西省铜钨新材料重点实验室开放基金(2013-KLP-01) 国家科技支撑计划项目(2012BAE02B01)

关键词：烧结NdFeB永磁体 , 电泳沉积 , 纳米二氧化钛 , 聚氨酯涂层

Preparation and Corrosion Resistance of TiO2/Polyurethane Coatings on Sintered NdFeB Permanent Magnets

Keywords： sintered NdFeB permanent magnet , electrophoretic deposition , TiO2 nanoparticle , polyurethane coating

采用阴极电泳沉积在烧结NdFeB永磁体表面制备了TiO2纳米颗粒增强的聚氨酯涂层,研究了电泳沉积过程中电流密度的变化趋势和电泳液中二氧化钛颗粒浓度对复合涂层的表面形貌、粗糙度、接触角、显微硬度和耐蚀性的影响.结果表明,电泳沉积过程中电流密度随着时间的延长而降低,大致可分为3个阶段;二氧化钛颗粒可均匀弥散地分布在聚氨酯基体中,随着电泳液中二氧化钛浓度的增加,复合涂层中镶嵌的颗粒越多,导致表面粗糙度和硬度增大,而接触角降低;复合涂层可大幅度降低NdFeB试样在H2SO4溶液中浸泡的质量损失,且二氧化钛浓度越大,质量损失越小,即纳米二氧化钛颗粒的掺入进一步提高了NdFeB永磁体的耐蚀性.

参考文献

[1]	Oliver Gutfleisch;Matthew A. Willard;Ekkes Bruck;Christina H. Chen;S. C. Sankar;J. Ping Liu.Magnetic Materials and Devices for the 21st Century: Stronger, Lighter, and More Energy Efficient[J].Advanced Materials,20117(7):821-842.
[2]	Davies BE.;Harris IR.;Mottram RS..Recent developments in the sintering of NdFeB[J].Materials Chemistry and Physics,20011/3(1/3):272-281.
[3]	X. K. Yang;Q. Li;S. Y. Zhang;X. K. Zhong;Y. Dai;F. Luo.Electrochemical corrosion behaviors and protective properties of Ni-Co-TiO_2 composite coating prepared on sintered NdFeB magnet[J].Materials and Corrosion,20107(7):618-625.
[4]	Shoudong Mao;Hengxiu Yang;Zhenlun Song;Jinlong Li;Huagen Ying;Kefei Sun.Corrosion behaviour of sintered NdFeB deposited with an aluminium coating[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,20115(5):1887-1894.
[5]	Tao, Lei;Li, Heqin;Shen, Jiong;Qiao, Kai;Wang, Wei;Zhou, Chu;Zhang, Jing;Tang, Qiong.Corrosion resistance of the NdFeB coated with AlN/SiC bilayer thin films by magnetron sputtering under different environments[J].Journal of Magnetism and Magnetic Materials,2015:124-128.
[6]	Jing Chen;Bajin Xu;Guoping Ling.Amorphous Al-Mn coating on NdFeB magnets: Electrodeposition from AlCl_3-EMIC-MnCl_2 ionic liquid and its corrosion behavior[J].Materials Chemistry and Physics,20122/3(2/3):1067-1071.
[7]	Wongsarat, W.;Sarapirom, S.;Aukkaravittayapun, S.;Jotikasthira, D.;Boonyawan, D.;Yu, L.D..Plasma immersion ion implantation and deposition of DLC coating for modification of orthodontic magnets[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,2012:346-350.

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