化学冶金的にみたスパッタリング現象 : Fe-N 系

概要

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The spattering phenomenon of molten Iron-Nitrogen system under the condition of arc melting has been observed using a high speed camera. It was found that the spattering phenomenon was much related to the nitrogen content of molten iron under the arc. The nitrogen content of arc melted iron (260ppm ○) increases with increasing the nitrogen partial pressure up to P_<N_2>=0.004 atm, while above 0.004 atm, the nitrogen content becomes nearly constant around 650ppm N, and the spattering phenomenon begins to occur from above 0.004 atm nitrogen partial pressures which correspond to the solubility of nitrogen in the molten pure iron above 1 atm nitrogen partial pressure of non-arc melting. From the photographic analysis for spattering particles, the internal pressure of a bubble in the molten iron during the arc melting was calculated from the initial velocity of a spattering particle, which was also a function of supersaturation of nitrogen.
社団法人溶接学会の論文
1975-10-05