刘家琴,曹玉杰,张鹏杰,张浩,衣晓飞,陈静武,吴玉程

• 1:合肥工业大学工业与装备技术研究院
• 2:合肥工业大学材料科学与工程学院
• 3:稀土永磁材料国家重点实验室

摘要(Abstract)：

为了提高烧结NdFeB磁体的耐腐蚀性能,采用真空蒸镀的方法在烧结NdFeB磁体表面沉积Al薄膜,并对工艺过程中的工艺参数进行优化。结果表明:真空室温度对Al薄膜的结构及耐腐蚀性能基本没有影响,但温度过高会导致Al薄膜表面岛状结构的增大,造成Al薄膜的厚度一致性难以控制;随着蒸发源温度的增加,Al薄膜的沉积速率逐渐增加,但是随着蒸镀时间的延长,Al薄膜的沉积效率逐渐降低,这是由于Al蒸发原子在基片上冷凝沉积的物理驱动力下降导致的。采用最佳工艺参数制备的厚度为8μm的Al薄膜,耐中性盐雾试验时间可达60 h,且Al镀层的涂覆对NdFeB磁体的磁性能基本没有影响。

关键词(KeyWords)： 烧结钕铁硼;永磁材料;真空蒸镀;Al薄膜;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划项目(2012BAE02B01);; 安徽省自然科学基金(1408085MKL72,1408085MKL73)

作者(Author): 刘家琴,曹玉杰,张鹏杰,张浩,衣晓飞,陈静武,吴玉程

DOI: 10.13289/j.issn.1009-6264.2017.03.025

参考文献(References)：

• [1]Sagawa M,Fujimura S,Togawa N,et al.New material for permanent magnets on a base of Nd and Fe[J].Journal of Applied Physics,1984,55(6):2083-2087.
• [2]Davies B E,Mottram R S,Harris I R.Recent developments in the sintering of Nd Fe B[J].Materials Chemistry and Physics,2001,67(1):272-281.
• [3]Wang S C,Li Y.In situ TEM study of Nd-rich phase in Nd Fe B magnet[J].Journal of Magnetism and Magnetic Materials,2005,285(1/2):177-182.
• [4]Fidler J.On the role of the ND-rich phases in sintered Nd-Fe-B magnets[J].IEEE Transactions on Magnetics,1987,23(5):2106-2108.
• [5]Filip O,El-Aziz A M,Hermann R,et al.Effect of Al additives and annealing time on microstructure and corrosion resistance of Nd-Fe-B alloys[J].Materials Letters,2001,51(3):213-218.
• [6]Harland C L,Davies H A.Magnetic properties of melt-spun Nd-rich Nd Fe B alloys with Dy and Ga substitutions[J].Journal of Alloys and Compounds,1998,281(1):37-40.
• [7]Skulj I,Evans H E,Harris I R.Oxidation of Nd Fe B-type magnets modified with additions of Co,Dy,Zr and V[J].Journal of Materials Science,2008,43(4):1324-1333.
• [8]Rampin I,Bisaglia F,DabalàM.Corrosion properties of Nd Fe B magnets coated by a Ni/Cu/Ni layer in chloride and sulfide environments[J].Journal of Materials Engineering and Performance,2010,19(7):970-975.
• [9]Ma C B,Cao F H,Zhang Z,et al.Electrodeposition of amorphous Ni-P coatings onto Nd-Fe-B permanent magnet substrates[J].Applied Surface Science,2006,253(4):2251-2256.
• [10]Mao S D,Yang H X,Li J L,et al.corrosion properties of aluminium coatings deposited on sintered Nd Fe B by ion-beam-assisted deposition[J].Applied Surface Science,2011,257(13):5581-5585.
• [11]Ali A,Ahmad A.Corrosion protection of sintered Nd Fe B magnets by CAPVD Ti2N coating[J].Materials and Corrosion,2009,60(5):372-375.
• [12]Ali A,Ahmad A,Deen K M.Impeding corrosion of sintered Nd Fe B magnets with titanium nitride coating[J].Materials and Corrosion,2009,61(2):130-135.
• [13]Yang X,Li Q,Zhang S,et al.Electrochemical corrosion behaviors and corrosion protection properties of Ni-Co alloy coating prepared on sintered Nd Fe B permanent magnet[J].Journal of Solid State Electrochemistry,2010,61(7):618-625.
• [14]Chen Z,Ng A,Yi J,et al.Multi-layered electroless Ni-P coatings on powder-sintered Nd-Fe-B permanent magnet[J].Journal of Magnetism and Magnetic Materials,2006,302(1):216-222.
• [15]Mao S,Yang H,Song Z,et al.Corrosion behaviour of sintered Nd Fe B deposited with an aluminium coating[J].Corrosion Science,2011,53(5):1887-1894.
• [16]Xie T,Mao S,Yu C,et al.Structure,corrosion,and hardness properties of Ti/Al multilayers coated on Nd Fe B by magnetron sputtering[J].Vacuum,2012,86(10):1583-1588.
• [17]Mao S,Xie T,Zheng B,et al.Structures and properties of sintered Nd Fe B coated with IBAD-Al/A2O3,multilayers[J].Surface and Coatings Technology,2012,207(9):149-154.

文章评论(Comment)：