采用阴极电泳沉积技术在烧结NdFeB磁体表面制备了氧化钛/环氧树脂复合涂层,分别通过光学显微镜、扫描电镜、接触角测量仪、静态全浸泡试验和电化学工作站分析了涂层的表面形貌、润湿性和耐蚀性.结果表明,复合涂层表面光滑平整,无宏观缺陷,氧化钛颗粒均匀弥散地镶嵌在环氧树脂涂层中;复合涂层提高了烧结NdFeB磁体的润湿性,使基体表面从疏水向亲水转变;复合涂层降低了烧结NdFeB磁体在硫酸中浸泡的失重,在3.5％NaCl溶液中的腐蚀电流密度较基体降低了3个数量级.因此,复合涂层能有效地提高烧结NdFeB磁体的耐蚀性.
参考文献
| [1] | Eischx O Gutfl;Willard M A;Brück E et al.Magnetic materials and devices for the 21st century:Stronger,lighter,and more energy efficient[J].Advanced Materials,2011,23:821. |
| [2] | Davies BE.;Harris IR.;Mottram RS. .Recent developments in the sintering of NdFeB[J].Materials Chemistry and Physics,2001(1/3):272-281. |
| [3] | Matsuura Y .Recent development of Nd-Fe-B sintered magnets and their applications[J].Journal of Magnetism and Magnetic Materials,2006(2):344-347. |
| [4] | W. Li;W. Pan;Y. Q. Guo;Z. H. Guo;M. G. Zhu;A. H. Li;X. M. Li;J. W. Cui .Research progress on high performance Nd-Fe-B permanent magnet[J].Physica Status Solidi. C, Conferences and critical reviews,2007(12):4611-4616. |
| [5] | Man H H;Man H C;Leung L K .Corrosion protection of NdFeB magnets by surface coatings-Part 2:Electrochemical behaviour in various solutions[J].Journal of Magnetism and Magnetic Materials,1996,152:47. |
| [6] | Jan G;McGuiness P J;Farr J P G et al.Environmental degradation of NdFeB magnets[J].Journal of Alloys and Compounds,2009,478:188. |
| [7] | Song Y W;Zhang H;Yang H X .A comparative study on the corrosion behavior of NdFeB magnets in different electrolyte solutions[J].Materials and Corrosion,2008,59:794. |
| [8] | El-Moneim A A;Gebert A;Uhlemann M et al.The influence of Co and Ga additions on the corrosion behavior of nanocrystalline NdFeB magnets[J].Corrosion Science,2002,44:1857. |
| [9] | Song LZ;Wang YN;Lin WZ;Liu Q .Primary investigation of corrosion resistance of Ni-P/TiO2 composite film on sintered NdFeB permanent magnet[J].Surface & Coatings Technology,2008(21):5146-5150. |
| [10] | Li, JL;Mao, SD;Sun, KF;Li, XM;Song, ZL .AlN/Al dual protective coatings on NdFeB by DC magnetron sputtering[J].Journal of Magnetism and Magnetic Materials,2009(22):3799-3803. |
| [11] | 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. |
| [12] | Takeuchi SMT;Azambuja DS;Costa I .Cerium conversion layer for improving the corrosion resistance of phosphated NdFeB magnets[J].Surface & Coatings Technology,2006(6):3670-3675. |
| [13] | Mao S D;Yang H X;Li J L et al.Corrosion properties of aluminium coatings deposited on sintered NdFeB by ionbeam-assisted deposition[J].Applied Surface Science,2011,257:5581. |
| [14] | Ali A;Ahmad A .Corrosion protection of sintered NdFeB magnets by CAPVD Ti2 N coating[J].Materials and Corrosion,2009,60(05):372. |
| [15] | Takeuchi SMT;Azambuja DS;Saliba-Silva AM;Costa I .Corrosion protection of NdFeB magnets by phosphating with tungstate incorporation[J].Surface & Coatings Technology,2006(24):6826-6831. |
| [16] | Li Q;Yang X K;Zhang L et al.Corrosion resistance and mechanical properties of pulse electrodeposited Ni-TiO2 composite coating for sintered NdFeB magnet[J].Journal of Alloys and Compounds,2009,482:339. |
| [17] | Mao S D;Yang H X;Huang F et al.Corrosion behaviour of sintered NdFeB coated with Al/Al2O3 multilayers by magnetron sputtering[J].Applied Surface Science,2011,257:3980. |
| [18] | 于金鑫,陈拯,宛萍芳,陈淑君.电泳漆边角覆盖缺陷研究[J].现代涂料与涂装,2010(04):55-56. |
| [19] | 杜军,张平,赵军军,蔡志海,田飞.NdFeB基体ZrN涂层的耐腐蚀性能[J].中国表面工程,2009(05):40-44,49. |
| [20] | 赵麦群;雷阿丽.金属的腐蚀与防护[M].北京:国防工业出版社,2002 |
| [21] | Dorner-Reisel A.;Schurer C.;Irmer G.;Muller E. .Electrochemical corrosion behaviour of uncoated and DLC coated medical grade Co28Cr6Mo[J].Surface & Coatings Technology,2004(0):830-837. |
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