310 扁平溶滴のフラクタル評価(生産技術その1)

概要

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Plasma-sprayed coatings are deposited onto a substrate by the flattened splats of the molten metal and ceramic droplets. The quality of the formed deposit greatly depends on the individual flattened splats. This paper presents free-falling and splat-formation experiments in which molten droplets of Sn were impinged on the cold substrate and solidified after the flattening process. To evalute the contour of the flattened splats, the unevennes ratio was introduced and defined by the contour length of the flattened splats to the circumferential length of an equivalent regular circle having the same area as the flattened splat. This report presents that the fractal dimension is introduced to a new evaluating measure for the contour of flattened splats. The unevnness ratio and fractal dimension with respect to impinging velocity, Re and We change in a bi-liner relation for the molten droplets approximately in the same size.
一般社団法人日本機械学会の論文
2001-09-07