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Citation: Yang Fang-Zu, Ma Zhao-Hai, Huang Ling, Xu Shu-Kai, Zhou Shao-Min. Electrodeposition, Structure and Properties of an Amorphous Ni-W-B/ZrO₂ Composite Coating[J]. Acta Physico-Chimica Sinica, ;2004, 20(12): 1411-1416. doi: 10.3866/PKU.WHXB20041203 shu

Electrodeposition, Structure and Properties of an Amorphous Ni-W-B/ZrO₂ Composite Coating

1.
Chemistry Department, State Key Laboratory of Physical Chemistry of Solid Surfaces, Institute of Physical Chemistry, Xiamen University, Xiamen　361005

Received Date: 10 May 2004
Available Online: 15 December 2004

Ni-W-B/ZrO2 composite coating was electrodeposited from the Ni-W-B electrolyte solution containing zirconia particles. The electrodeposition, heat treatment, structure, surface morphology, microhardness, and corrosion resistance of the composite coating were studied by means of differential scanning calorimeter (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical techniques. The results showed that the mass composition of the obtained Ni-W-B/ZrO2 composite coating was Ni 47.5％,W 40.9％, B 0.9％ and ZrO2 10.7％. DSC combined with XRD results illustrated that zirconia took a remarkable influence on the structure of Ni-W-B matrix, leading the composite coating to a more obvious amorphous characteristics. The composite coating presented in higher microhardness compared to Ni-W-B alloy, granular structure with grain boundaries and crack-free. Zirconia particles were dispersed in the Ni-W-B matrix. After heat treatment at 400 ℃ for 1 h, surface morphology of the coating was kept almost no changes. The structure of the matrix was transferred to a crystal of Ni-W solid solution, and W was segregated to the surface of the deposit. The microhardness and corrosion resistance were enhanced, whereas most of zirconia particles were tten rid of from the surface layer.
- Ni-based alloy;Composite coating;Electrodeposition;Amorphous alloy; Heat treatment
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Electrodeposition, Structure and Properties of an Amorphous Ni-W-B/ZrO2 Composite Coating

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通讯作者: 陈斌, bchen63@163.com

Electrodeposition, Structure and Properties of an Amorphous Ni-W-B/ZrO₂ Composite Coating