阴极等离子电解沉积Ni-P和Ni-P-ZrO_2纳米晶涂层

Ni-P and Ni-P-ZrO_2 nano-cristallized coatings prepared by cathode plasma electrolytic deposition

采用电极移动液流式阴极等离子电解在304不锈钢基体上沉积Ni-P和Ni-P-Zr O2纳米晶涂层。结果表明,提高溶液中Zr O2纳米颗粒的浓度可以降低起弧电压,对Ni-P-Zr O2涂层的成分、结构和性能有着显著的影响。SEM形貌观察表明,阴极等离子电解沉积的Ni-P和Ni-P-Zr O2涂层具有熔融后快速凝固的特征,涂层与基体具有冶金结合。根据XRD的衍射峰宽的计算结果证明这些涂层具有纳米晶粒结构。元素分析结果证明,提高溶液中Zr O2纳米颗粒的浓度,可以提高镀层中弥散Zr O2颗粒的含量,但会降低P的含量。硬度和磨损实验结果表明,Ni-P涂层中弥散纳米Zr O2后,可显著提高涂层的显微硬度和耐磨性能。

Ni-P and Ni-P-ZrO2nano-crystallized coatings were fabricated by the cathode plasma electrolyte deposition( CPED) on 304 stainless steel. The results show that the increase of Zr O2 nanoparticles concentration in the solution can reduce the arcstarding voltage,and has a significant effect on the composition,structure and performance of the Ni-P-Zr O2 coatings. The SEM morphology observation shows that Ni-P and Ni-P-Zr O2 coatings prepared by CPED have the characteristics of rapid solidification after melting,and metallurgical combination between the coating and substrate. The grain sizes of the coatings were calculated based on the width of XRD spectra peak,demonstrating the coatings with nanometer structure. Element analysis results show that increasing the Zr O2 content in the solution can enhance the Zr O2 content dispersed in the Ni-P coating,but can reduce the P content of the coating. The hardness and abrasion experiment results show that the Zr O2 nano particles dispersed in Ni-P coating can significantly improve the microhardness and wear resistance of the coating.