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| Effect of the Heat Treatment on the Structure and the Properties of the Electrodeposition Fe–Ni–S Amorphous Alloy |
| SONG Yunjian, WANG Senlin, LI Caicai, ZHANG Yi |
| College of Materials Science and Engineering, Huaqiao University, Xiamen 361021 |
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Cite this article:
SONG Yunjian WANG Senlin? LI Caicai ZHANG Yi. Effect of the Heat Treatment on the Structure and the Properties of the Electrodeposition Fe–Ni–S Amorphous Alloy. Chin J Mater Res, 2010, 24(6): 655-660.
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Abstract The Fe-Ni-S amorphous alloy film was electro-desposited from an acidic bath containing boric acid as a buffer agent, sodium citrate as a complexing agent and saccharin and 2-butyne-1,4-diol as the additives. The crystallization behavior and surface micromorphlogy of the alloy were studied by differential scanning calorimetry (DSC), X-ray diffractometry (XRD) and scanning electron microscope (SEM). The structure of the as-plated coating is amorphous. The amorphous alloy coating was converted into Fe7Ni3 (Im3m) microcrystalline at 250℃.The alloy was initially crystalled to NiS (R3m) and FeNi3 (Pm3m) at 320.4℃, and was mainly crystalled at 417.9℃, then, was completely crystalled to large number of diameter 100～200 nm grains at 500℃. The effect of heat treatment temperature on the magnetic properties, the micro-hardness and the corrosion resistance of the coating were investigated. As a result, the magnetic properties, micro-hardness and corrosion resistance of the coating rose with the increase of the heat treatment temperature bellow 250℃, then, they all decreased with the increase of the heat treatment temperature above 250℃. The maximum of the saturation magnetization, micro-hardness and electrochemical impedance (MS≈1201.1 kA/m, HV≈425.4 kg/mm2, Z′≈400 Ω) and the minimum of the coercivity (HC ≈2.1 kA/m) appeared at 250℃. Thus, the alloy coating heated at 250℃ possesses best soft magnetic performance and corrosion resistance.
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Received: 09 August 2010
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