電解放電現象がファインセラミックスに及ぼす影響

概要

論文の詳細を見る
Many trials of fine ceramics machining are being conducted because of their increased impotence in industry. One of them is the machining utilizing electrochemical discharge phenomena, which is tested as wire EDM, combined energy machining (combining chemical reaction, electrodischarge phenomena and mechanical action) and so on. However,the effect of the electrochemical discharge phenomena on fine ceramics has not been known yet. In this paper,the influence of electrochemical discharge phenomena on the surface of fine ceramics was studied. Through this investigation,it was found that the NaOH electrolyte caused alkaline erosion significantly under the condition of existing electrochemical discharge. The affected layer of ceramics decreased its surface hardness,and the thickness of the layer was from 1 to 5μm in the condition of this experiment. In the case of more severe electrochemical discharge conditions,the ceramic material was removed by its energy,and the removal rate increased with increasing alkaline concentration. Ceramics with low thermal conductivity such as ZrO_2, Al_2O_3 or Pyrex glass caused cracks due to thermal stress by severe electrochemical discharge.
社団法人日本材料学会の論文
1986-12-15