熱処理温度別砥粒からの電子放射

砥粒の破砕と電子放射(続報)

抄録

This paper describes first, the exo-electron emission phenomena from the heat-treated abrasive grains. And then the effects of the exo-electron emission from the grains were examined on the affinity between the reginoid bond and the grain-surface. Second, the exoelectron emission phenomena from the diamonds and the CBN grains were compared. The main results are as follows:
(1) Al₂O₃ series grains which were heat-treated at temperature of under 600°C gave a strong emission intensity, but SiC series grains gave no emission without regard to the heat-treatment.
(2) The grade of the reginoid wheels baked with the Al₂O₃ grains which were heat-treated at temperature of under 600°C was weaker than that at temperature of over 600°C, but the grade values of the reginoid wheels with the SiC grains which were heat-treated at 200°C and 1300°C were same. Because the exo-electron emission from the grains when the wheel is baked will interrupt the affinity between the bond and the grain-surface.
(3) The man-made diamonds gave a weak emission intensity and the nature diamonds gave no emission. But the CBN grains gave more stronger intensity than that from WA grains. And a spontaneous emission occured even at normal temperature from the fractured CBN grains.
(4) It was suggested that in grinding process the exo-electron emission influenced on facilitating of bite of cutting edge on metal surface, and on adsorption of grinding fluid to the metal surface.