In this study, NiWP ternary shell layer on diamond powder was synthesized by electroless deposition method. The characteristics of thin films with different deposition parameters such as bath compositions, temperature, and pH were studied. The composition of tungsten in NiWP thin films could be varied by the concentration of sodium tungstate, and it was saturated as ~24 wt%. With the decrease of phosphorous content, crystal structure was changed from amorphous to polycrystalline by the addition of sodium tungstate in the electrolyte. The incorporation of tungsten into NiP films could improve the hardness and the corrosion resistivity, which is critical for utilizing the diamond powders as a sawing applications. From systematic investigations, the optimal electroless deposition of NiWP on the diamond powders was obtained at 70 °C with pH 9.

本研究采用化学沉积法合成了金刚石粉末上的 NiWP 三元壳层。研究了具有不同沉积参数（如浴液成分、温度和 pH 值）的薄膜的特性。NiWP 薄膜中钨的成分可以随钨酸钠的浓度而变化，饱和度约为 24 wt%。随着磷含量的降低，通过在电解液中加入钨酸钠，晶体结构由无定形变为多晶。将钨掺入 NiP 薄膜可以提高硬度和耐腐蚀性，这对于将金刚石粉末用作锯切应用至关重要。通过系统研究，在 70 °C 和 pH 9 下获得了 NiWP 在金刚石粉末上的最佳化学沉积。