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首页> 外文期刊>Journal of coatings technology and research >Microstructure analyses and thermophysical properties of nanostructured thermal barrier coatings
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Microstructure analyses and thermophysical properties of nanostructured thermal barrier coatings

机译：纳米结构热障涂层的微观结构分析和热物理性质

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摘要

Nanostructured 8 wt% yttria partially stabilized zirconia coatings were deposited by air plasma spraying. Transmission electron microscopy, scanning electron microscopy, and X-ray diffraction were carried out to analyze the as-sprayed coatings and powders. Mercury intrusion porosimetry was applied to analyze the pore size distribution. Laser flash technique and differential scanning calorimetry were used to examine the thermophysical properties of the nanostructured coatings. The results demonstrate that the as-sprayed nanostructured zirconia coatings consist of the nonequilibrium tetragonal phase. The micro-structure of the nanostructured coatings includes the initial nanostructure of powder and columnar grains. Moreover, micron-sized equiaxed grains were also exhibited in the nanostructured coatings. Their evolution mechanisms are discussed. The as-sprayed nanostructured zirconia coating shows a bimodal pore size distribution, and has a lower value of thermal conductivity than the conventional coating.
机译：通过空气等离子喷涂沉积了纳米结构的8 wt％的氧化钇部分稳定的氧化锆涂层。进行透射电子显微镜，扫描电子显微镜和X射线衍射以分析喷涂的涂层和粉末。采用水银压入孔隙率法分析孔径分布。激光闪光技术和差示扫描量热法用于检查纳米结构涂层的热物理性质。结果表明，喷涂后的纳米结构氧化锆涂层由非平衡四方相组成。纳米结构涂层的微观结构包括粉末和柱状晶粒的初始纳米结构。此外，在纳米结构涂层中还表现出微米尺寸的等轴晶粒。讨论了它们的进化机制。喷涂后的纳米结构氧化锆涂层显示出双峰孔径分布，并且具有比常规涂层更低的热导率值。

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  • 来源
    《Journal of coatings technology and research》 |2009年第3期|383-390|共8页
  • 作者

    Hong Zhou; Fei Li; Jun Wang; Bao-de Sun;

  • 作者单位

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    air plasma spray; thermal barrier coatings; microstructure; thermal conductivity;

    机译：空气等离子喷涂;隔热涂层;微观结构导热系数;

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