N₂, Ar, Krガス中のダイヤモンドと水晶のすべり摩擦における気体放電

抄録

Luminescent phenomena during sliding friction between a diamond micro sphere and a flat quartz single-crystal disk under controlled ambient gas pressure of N₂, Ar, and Kr were investigated. Spectra of the luminescence clearly indicated the gas discharge of each gas around the frictional contact. Spatial distributions of the gas-discharge luminescence were measured. The distributions at different sliding speeds were almost identical. The distributions depend strongly on the gas species and the pressure; the area of the discharge becomes larger with decrease of the gas pressure.