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首页> 外文期刊>Journal of Materials Engineering and Performance >The Effects of Sodium Tungstate on the Characteristics of Microarc Oxidation Coating on Ti6Al4V
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The Effects of Sodium Tungstate on the Characteristics of Microarc Oxidation Coating on Ti6Al4V

机译：钨酸钠对Ti6Al4V微内氧化涂层特性的影响

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摘要

Microarc oxidized coatings on Ti6Al4V alloy are produced in a basic Na~(2)SiO~(3)-(NaPO~(3))~(6)-NaAlO~(2)electrolyte with different concentrations of sodium tungstate. The effects of sodium tungstate on the characteristics of the coating are investigated through current–time response, microstructure, composition, hardness, bonding strength and antifriction measurements. The coating is mainly composed of Al~(2)TiO~(5), TiO~(2), Al~(2)O~(3)and amorphous substances regardless of the concentration of sodium tungstate. The sodium tungstate is transformed into trace amounts of WO~(3), which significantly promotes the growth of the coatings. The bonding strength and antifriction performance of the coatings are enhanced with the concentration of sodium tungstate less than 4?g/L, whereas excessive sodium tungstate results in a coarse outer layer with more microdefects, which deteriorates the wear resistance of the coating. Based on the results of scratch and wear test with energy-dispersive x-ray spectroscopy of the worn surface and debris, the optimal concentration of sodium tungstate doped into the electrolyte is identified, and this concentration yields superior tribological property. Excellent wear resistance is achieved by combining a high bonding strength and hardness with a less defective outer layer.
机译：Ti6Al4V合金上的微arc氧化涂层在碱性Na〜（2）SiO〜（3） - （Napo〜（3））〜（6）-（6）-1Naalo〜（2）电解质中，具有不同浓度的钨酸钠。通过当前时间响应，微观结构，组成，硬度，粘合强度和耐抗度测量来研究钨酸钠对涂层特性的影响。涂层主要由Al〜（2）TiO〜（5），TiO〜（2），Al〜（2）O〜（3）和无定形物质，无论钨酸钠浓度如何。将钨酸钠转化为痕量的WO〜（3），这显着促进了涂层的生长。涂层的粘合强度和抗抗性性能随钨酸钠浓度的浓度增强，而过量钨酸钠导致具有更多微量微碎片的粗糙外层，其劣化涂层的耐磨性。根据磨损表面和碎屑的能量分散X射线光谱的划痕和磨损试验结果，鉴定了掺杂到电解质中的钨酸钠的最佳浓度，并且该浓度产生优异的摩擦学性质。通过将高粘合强度和硬度与较差的外层相结合来实现优异的耐磨性。

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  • 作者

    Tong Zhou; Yuandi Ding; Qin Luo; Zhenbo Qin; Qi Zhang; Bin Shen; Wenbin Hu; Lei Liu;

  • 作者单位

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

    School of Material Science and Engineering Tianjin University;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 金属学与金属工艺;工程材料学;
  • 关键词

    bonding strength; microarc oxidation; sodium tungstate; titanium alloy; wear resistance;

    机译：粘合强度;Microarc氧化;钨酸钠;钛合金;耐磨性;

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