電極消耗に及ぼす焼結温度の影響

酸化性雰囲気用プラズマアーク電極の開発研究(第2報)

抄録

This study has been carried out to explain the effect of sintering temperature on life time of cathode for air plasma cutting.
Zr-Y₂O₃, Hf-Y₂O₃ and Ru-Y₂O₃ systems were studied and compared. It was concluded that; in the cases of Zr-Y₂O₃ and Hf-Y₂O₃ electrodes, the sintering temperature was a little effect on the electrode consumption. Also, the erosion resistance during discharge was not improved by adding Y₂O₃.
On the other hand, in Ru-Y₂O₃ electrode, the erosion resistance during discharge was remarkably improved by adding Y₂O₃. Its different property is related to the high density of sintered body which is sintered at comparatively high temperature, 2373 K.