溶射プロセス制御のためのスプラット問題 Splat Problem for Control of Thermal Spray Process

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Some kinds of metallic powder particles were thermally sprayed onto the mirror polished metallic substrate surface and the effect of both substrate temperature and ambient pressure on the flattening behavior of the particle was systematically investigated. In the flattening behavior of the sprayed particle onto the substrate surface, critical conditions were recognized both in the substrate temperature increasing and ambient pressure decreasing. That is, the flattening behavior changed transitionally from splash shape to disk one on that critical temperature and pressure range, respectively. A transition temperature, T<SUB>t</SUB>, and transition pressure, P<SUB>t</SUB>, were defined and introduced, respectively for those critical conditions. Correspondingly, the coating adhesion property changed transitionally on that critical temperature and pressure range, respectively. Three dimensional transition curvature by combining both transition temperature and transition pressure dependence was proposed as a practical and effective controlling principle of the thermal spray process. The fact that the dependence of both transition temperature and transition pressure on the sprayed particle material had similar tendency indicated that the dynamic wetting of the substrate by the molten particles seemed to be a domination in the flattening.

Some kinds of metallic powder particles were thermally sprayed onto the mirror polished metallic substrate surface and the effect of both substrate temperature and ambient pressure on the flattening behavior of the particle was systematically investigated. In the flattening behavior of the sprayed particle onto the substrate surface, critical conditions were recognized both in the substrate temperature increasing and ambient pressure decreasing. That is, the flattening behavior changed transitionally from splash shape to disk one on that critical temperature and pressure range, respectively. A transition temperature, T<SUB>t</SUB>, and transition pressure, P<SUB>t</SUB>, were defined and introduced, respectively for those critical conditions. Correspondingly, the coating adhesion property changed transitionally on that critical temperature and pressure range, respectively. Three dimensional transition curvature by combining both transition temperature and transition pressure dependence was proposed as a practical and effective controlling principle of the thermal spray process. The fact that the dependence of both transition temperature and transition pressure on the sprayed particle material had similar tendency indicated that the dynamic wetting of the substrate by the molten particles seemed to be a domination in the flattening.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 59(2), 67-71, 2012-02-15

    一般社団法人 粉体粉末冶金協会

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各種コード

  • NII論文ID(NAID)
    10030479824
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    05328799
  • NDL 記事登録ID
    023549534
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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