1239 コールドスプレーによる銅皮膜特性と単粒子の扁平挙動に及ぼすノズル入口先細部延長の効果(J11-1 粒子付着・成膜プロセスと膜の機械的特性(1) コールドスプレー皮膜の諸特性,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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In order to improve the coating properties, nozzle geometry influences gas dynamics making sprayed particle behavior is important parameters. Gas flow at the entrance of the convergent section of the nozzle takes place at relatively high temperature and at subsonic speeds. Thus, this region is a very suitable environment for heating the spray particles. As already reported, it has shown that the improvement of the adhesion strength and deposition efficiency of copper coating by extension of the convergent length of nozzle. In this study, experiment was conducted to investigate the effect of convergent section length of nozzle on adhesion morphology and deposition ratio of individual copper particles. Used nozzles have variety length of convergent section. The result shows that deposition ratio and flattening ratio of individual copper particles on steel substrate gradually increase along with extension of the convergent section length of nozzle.
社団法人日本機械学会の論文
2008-08-02