1. 上海应用技术学院化学与环境工程学院，上海 201418 2. 赣南师范学院, 江西 赣州 341000 3. Regenia AB, Stockholm 10691, Sweden
Preparation of Electrodeposited Mo-Ni Coating and Its Spectral Properties
LIU Xiao-zhen1, XIONG Li-ping1, LIU Xiao-zhou2, CHEN Jie3, LUO Yi-fan1, SUN Ying1
1. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China 2. Gannan Normal University, Ganzhou 341000, China 3. Regenia AB, Stockholm 10691, Sweden
Abstract：Mo-Ni coatings were prepared on Ni alloy by electrodeposition method. The properties of microhardness, wear weight loss and friction coefficients, and thermal expansion of the coatings were investigated, respectively. Mo-Ni coatings were characterized with inductively coupled plasma-atomic emission spectroscopy (ICP-AES), energy-dispersive analyses of X-ray (EDAX), scanning electron microcopy (SEM), and X-ray diffraction (XRD) techniques, respectively. Mo-Ni coating shows higher microhardness, lower wear weight loss and friction coefficient compared with those of Ni alloy. The microhardness of Mo-Ni coating is as high as 518 HV, which is 72.67% higher than that of the Ni alloy (300 HV). The wear weight losses of Mo-Ni coating is 1.94 times lower than that of Ni alloy. The friction coefficient of Ni alloy and Mo-Ni coating are 0.640 and 0.559 respectively. The physical thermal expansion curve of Ni alloy has two the peaks in the ranges of 100～120 and 570～640 ℃ respectively; and that of Ni alloy+Mo-Ni coating has one the peaks in the ranges of 570～640 ℃. The peak of the physical thermal expansion curve of Ni alloy+Mo-Ni coating in the ranges of 570～640 ℃ is much smaller than that of the Ni alloy. Because the part of nickel was replaced by molybdenum in the Ni lattice, molybdenum decreases the lattices transformation of nickel (bcc→fcc). The reason for the formation of the small peak of the physical thermal expansion curve of Ni alloy+Mo-Ni coating in the ranges of 595～625 ℃ is the changes of MoNi4 and MoNi from the semi-crystalline structure to the crystalline structure respectively.
刘小珍1，熊莉萍1，刘小舟2，陈 捷3，罗一凡1，孙 颖1 . 钼镍镀层的制备及其光谱性能 [J]. 光谱学与光谱分析, 2014, 34(04): 1109-1113.
LIU Xiao-zhen1, XIONG Li-ping1, LIU Xiao-zhou2, CHEN Jie3, LUO Yi-fan1, SUN Ying1 . Preparation of Electrodeposited Mo-Ni Coating and Its Spectral Properties . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(04): 1109-1113.
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