Abstract
A direct electroless copper (Cu) coating on tungsten powders method requiring no surface treatment or stabilizing agent and using glyoxylic acid (C2H2O3) as a reducing agent was reported. The effects of copper sulfate concentration and the pH of the plating solution on the properties of the prepared W@Cu composite powders were assessed. The content of Cu in the composite powders was controlled by adjusting the concentration of copper sulfate in the electroless plating solution. A uniform, dense, and consistent Cu coating was obtained under the established optimum conditions (flow rate of C2H2O3 = 5.01 mL/min, solution pH = 12.25 and reaction temperature 45.35 °C) by using central composite design method. In addition, the crystalline Cu coating was evenly dispersed within the W@Cu composite powders and Cu element in the coating existed as Cu0. The formation mechanism for the W@Cu composite powders by electroless plating in the absence of surface treatment and stabilizing agent was also proposed.
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Funded by the National Natural Science Foundation of China (Nos. 51202175 and 11072228) and the National 111 Project ( No. B13035)
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Liu, S., Yu, K., Shen, Q. et al. Fabrication of W@Cu composite powders by direct electroless plating using a dripping method. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 829–833 (2013). https://doi.org/10.1007/s11595-013-0777-3
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DOI: https://doi.org/10.1007/s11595-013-0777-3