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Characterization of Yttria-Stabilized Zirconia Coatings Deposited by Low-Pressure Plasma Spraying
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  • 作者:Peng-jiang He ; Shuo Yin ; Chen Song…
  • 关键词:low ; pressure plasma spraying ; optical emission spectroscopy ; vickers microhardness ; yttria ; stabilized zirconia
  • 刊名:Journal of Thermal Spray Technology
  • 出版年:2016
  • 出版时间:February 2016
  • 年:2016
  • 卷:25
  • 期:3
  • 页码:558-566
  • 全文大小:2,176 KB
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  • 作者单位:Peng-jiang He (1)
    Shuo Yin (1)
    Chen Song (1)
    Frédéric Lapostolle (1)
    Han-lin Liao (1)

    1. IRTES-LERMPS (Institut de Recherche sur les Transports, l’Energie et la Société-Laboratoire d’Etude et de Recherches sur les Matériaux, les Procédés et les Surfaces), Université de Technologie de Belfort-Montbéliard, 90010, Belfort Cedex, France
  • 刊物类别:Chemistry and Materials Science
  • 刊物主题:Chemistry
    Surfaces and Interfaces and Thin Films
    Tribology, Corrosion and Coatings
    Materials Science
    Characterization and Evaluation Materials
    Operating Procedures and Materials Treatment
    Analytical Chemistry
  • 出版者:Springer Boston
  • ISSN:1544-1016
文摘
The research presented here aimed to apply plasma spraying at a low pressure of 100 Pa for fabricating the columnar structure or dense coatings. These coatings with different structures were elaborated from the vapor condensation and molten droplets, respectively, using the agglomerated YSZ powders and a relatively low power commercial F4-VB torch. It was shown that the crystallite size of coating deposited from the vapor condensation at a spraying distance of 200 mm was reduced to 17.1 nm from 43.7 nm of the feedstock. Observations indicated that a thin columnar structured coating was produced out of the line of sight of projection. In the line of sight of projection, the hybrid structured coating was obtained. The relatively dense coating was fabricated using a specifically designed extended nozzle. Investigations by means of optical emission spectroscopy were performed to analyze the nature of the plasma jet with YSZ powders. The Vickers microhardness was also conducted. It was found that the relatively dense coating showed a higher value in comparison to the hybrid structure coating, up to 1273 ± 56 Hv100g. Keywords low-pressure plasma spraying optical emission spectroscopy vickers microhardness yttria-stabilized zirconia

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