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首页> 外文期刊>Applied Surface Science >Microscopic observation of laser glazed yttria-stabilized zirconia coatings
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Microscopic observation of laser glazed yttria-stabilized zirconia coatings

机译：激光玻璃氧化钇稳定的氧化锆涂层的显微观察

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摘要

Thermal barrier coatings (TBCs) are frequently used as insulation system for hot components in gas-turbine, combustors and power plant industries. The corrosive gases which come from combustion of low grade fuels can penetrate into the TBCs and reach the metallic components and bond coat and cause hot corrosion and erosion damage. Glazing the top coat by laser beam is advanced approach to seal TBCs surface. The laser beam has the advantage of forming a dense thin layer composed of micrograins. Plasma-sprayed yttria-stabilized zirconia (YSZ) coating was glazed with Nd-YAG laser at different operating conditions. The surface morphologies, before and after laser treatment, were investigated by scanning electron microscopy. Laser beam assisted the densification of the surface by remelting a thin layer of the exposed surface. The laser glazing converted the rough surface of TBCs into smooth micron-size grains with size of 2-9 μm and narrow grain boundaries. The glazed surfaces showed higher Vickers hardness compared to as-sprayed coatings. The results revealed that the hardness increases as the grain size decreases.
机译：隔热涂层（TBC）经常用作燃气轮机，燃烧室和电厂行业中热部件的绝缘系统。低级燃料燃烧产生的腐蚀性气体会渗透到TBC中，并到达金属部件和粘结层，并引起热腐蚀和侵蚀破坏。激光束给面漆上光是封闭TBC表面的先进方法。激光束具有形成由微颗粒组成的致密薄层的优点。在不同的操作条件下，用Nd-YAG激光给等离子喷涂的氧化钇稳定的氧化锆（YSZ）涂层上光。通过扫描电子显微镜研究激光处理之前和之后的表面形态。激光束通过重熔暴露表面的薄层来辅助表面致密化。激光上光将TBC的粗糙表面转化为具有2-9μm尺寸和狭窄晶界的光滑微米级晶粒。与喷涂的涂层相比，玻璃表面显示出更高的维氏硬度。结果表明，硬度随着晶粒尺寸的减小而增加。

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  • 来源
    《Applied Surface Science》 |2010年第21期|P.6213-6218|共6页
  • 作者

    M.F. Morks; C.C.Berndt; Y.Durandet; M.Brandt; J. Wang;

  • 作者单位

    Faculty of Engineering and Industrial Sciences, Industrial Research Institute Swinburne, 543-545 Burwood Rd, Hawthorn, Melbourne, Victoria 3122, Australia;

    rnIRIS, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia;

    rnIRIS, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia;

    School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Bundoora, Victoria 3083, Australia;

    rnIRIS, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    thermal barrier coating; YSZ; plasma spraying; laser glazing; microstructure; vickers hardness;

    机译：隔热涂层;YSZ;等离子喷涂;激光玻璃微观结构维氏硬度;

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