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首页> 外文会议>2003 International Thermal Spray Conference Vol.2; May 5-8, 2003; Orlando, Florida, USA >Titanium Suboxide Coatings Prepared by VPS Spraying
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Titanium Suboxide Coatings Prepared by VPS Spraying

机译：VPS喷涂制备的二氧化钛涂层

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摘要

Titanium oxide is established as an oxide material for thermally sprayed coating solutions and has received increasing interest over the last few years. Scientific and technological research focuses on electrical conductivity, solid lubrication and photocatalytic properties of titanium oxide (TiO_x) coatings of differing stoichiometry. The aim of this study was to investigate the effect of oxygen loss by reduction with hydrogen occurring in the conditions of vacuum plasma spraying (VPS) from commercial titanium oxide feedstock on coating micro-structure, hardness, phase composition, abrasion wear resistance and electrical resistivity. The X-ray diffraction pattern showed the presence of rutile, with peaks decreasing in intensity with increasing hydrogen content in the plasma-forming gas. The intensities of the peaks showed significant deviations from those of the standard. An increase in hydrogen flow rate did not influence the coating microstructure, hardness or abrasion wear resistance, but it caused the electrical resistivity to decrease. VPS coatings prepared from commercial fused and crushed powder show a resistivity in the range of 0.01-0.1 Ohm*cm, which corresponds exactly to the range published in the literature. Comparison with results for APS- and HVOF-sprayed coatings reveals that VPS coatings yield the best combination of abrasion wear resistance and electrical resistivity when commercial titanium oxide spray powder is used.
机译：氧化钛被确立为用于热喷涂涂料溶液的氧化物材料，并且在最近几年中受到越来越多的关注。科学技术研究的重点是化学计量不同的氧化钛（TiO_x）涂层的电导率，固体润滑和光催化性能。这项研究的目的是研究在商业化的二氧化钛原料进行真空等离子喷涂（VPS）的条件下，氢还原引起的氧损失对涂层微观结构，硬度，相组成，耐磨性和电阻率的影响。 。 X射线衍射图显示金红石的存在，其峰的强度随着等离子体形成气体中氢含量的增加而降低。峰强度显示出与标准品的明显偏差。氢气流速的增加不会影响涂层的微观结构，硬度或耐磨性，但会导致电阻率降低。由市售的熔融和压碎粉末制备的VPS涂层的电阻率在0.01-0.1欧姆*厘米的范围内，这恰好与文献中公布的范围相对应。与APS和HVOF喷涂涂料的结果比较表明，当使用市售的二氧化钛喷涂粉末时，VPS涂料具有耐磨性和电阻率的最佳组合。

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