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Citation: WANG Sen-Lin, HONH Liang-Liang, TU Man-Yu. Influence of Electroplating Conditions on the Structure and Magnetic Performance of Co-Mn Alloy[J]. Chinese Journal of Applied Chemistry, ;2009, 26(9): 1060-1064. shu

Influence of Electroplating Conditions on the Structure and Magnetic Performance of Co-Mn Alloy

1.
Department of Applied Chemistry, College of Materials Science and Engineering, Huaqiao University, The Key Laboratory for Functional Materials of Fujian Higher Education, Quanzhou 362021

Corresponding author: WANG Sen-Lin,
Received Date: 5 September 2008
Available Online: 20 January 2009
Fund Project: 福建省自然科学基金(E0640004)资助项目 (E0640004)

Co-Mn alloys were electro-plated from an acidic sulfate plating solution containing sodium citrate as a complexing agent and boric acid as a buffer agent.The cyclic voltammetric experiments show that the initial co-deposition potential of the alloy was about-1.282 V(vs.Hg-Hg₂SO₄,sat.K₂SO₄).The effects of the plating conditions on the structure and the magnetic performance of the Co-Mn coatings were studied by means of scanning electron microscopy(SEM),energy dispersive X-ray(EDS),X-ray diffraction(XRD) and vibrating sample magnetometer(VSM),respectively.It was found that the influence of the plating conditions on the coating composition was relatively remarkable.With the increase of the cathodic current density from 10×10^-3 to 40×10^-3 A/cm² at pH=4.0,the manganese molar content in the coating increased from 0.3% to 6.6%,and the coating structure changed from hcp Co-Mn solid solution to fcc Co-Mn solid solution.With the increase of the manganese molar content in the film,the saturation magnetization increased and then decreased.The maximal saturation magnetization reached 1 926.0 kA/m.The value of the film coercive force ranged from 31.6 kA/m to 33.9 kA/m.
- electro-deposition,
- Co-Mn alloy,
- magnetic performance,
- coating
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