(上海大學(xué) 上海市現(xiàn)代冶金與材料制備重點(diǎn)實(shí)驗(yàn)室， 上海 200072)
摘 要: 在電沉積鎳鐵合金膜過(guò)程中施加了不同強(qiáng)度的縱向強(qiáng)磁場(chǎng)， 研究了磁場(chǎng)強(qiáng)度對(duì)電沉積鎳鐵合金膜的微觀形貌、 晶粒取向和成分的影響。結(jié)果表明： 隨著磁感應(yīng)強(qiáng)度增加， 鍍層表面晶粒先粗化， 然后細(xì)化為數(shù)百納米的顆粒層； 同時(shí)樣品截面組織經(jīng)歷了由層狀生長(zhǎng)轉(zhuǎn)為樹(shù)枝晶、 脊?fàn)罹Ш蜅l狀晶的一系列變化；在12T強(qiáng)磁場(chǎng)下條狀晶沿外磁場(chǎng)方向破碎為球狀微晶組織； 強(qiáng)磁場(chǎng)使樣品（111）晶面擇優(yōu)取向， 并進(jìn)一步促進(jìn)了Fe2+的優(yōu)先沉積，使樣品中鐵含量隨外加磁場(chǎng)強(qiáng)度的增大而增加， 而膜的飽和磁化強(qiáng)度也線性提高。
關(guān)鍵字: 鎳鐵合金膜; 強(qiáng)磁場(chǎng); 電沉積; 微觀結(jié)構(gòu)
HUANG Qi-sheng, DENG Kang, XU Kuang-di
（ 1. Shanghai Enhanced Laboratory of Modern Metallurgy and Material Processing, Shanghai University, Shanghai 200072, China）
Abstract: NiFe alloy films were electrodeposited in the high static magnetic fields with magnetic flux perpendicular to the electric current, and the effects of the magnetic flux density (MFD) on the micromorphology, preferential orientation, composition and saturation magnetization of the samples were studied. The results show that, with the increase of MFD, the crystal grains on the surface of the samples are coarsened firstly, then refined, and finally formed spherical crystal grains with several hundreds of nanometers in size, distributing uniformly. At the same time, the microstructure of across-section experiences a series of changes from lamellar crystal to fir-tree crystal to carinate crystal and finally to strip structure, and when MFD reaches 12 T, the strip crystals are broken along the magnetic field direction and form spherical microcrystallites. With increase of MFD, the crystal plane（111） is oriented distinctly, and Fe2+ ion is preferential deposited with the increasing static magnetic field, which results in the increases of iron concentration and saturation magnetization of the samples.
Key words: NiFe alloy film; high static magnetic field; electrodeposition; microstructure
