高温酸化における光電子放出のその場測定

抄録

We have developed a device for in-situ measurement of the amount of photo-electron emission (PEE) at high temperature. The relation between the amount of PEE and the initial oxidation behavior of pure iron, pure nickel and SUS04 stainless steel was studied. The amount of PEE increased rapidly and then decreased gradually with the increase of temperature on the environment where oxidation occurred. The visible oxidation occurred after the peak of PEE. The amount of PEE decreased with oxidation time at high temperature, while it increased with time at low temperature and became more than 4 times that at high temperature in the case of iron. The amount of PEE was independent of the temperature, because the amount of PEE did not change in such a metal as gold that is not oxidized. The difference in the amount of PEE with temperature is considered to be assigned to the difference in adsorption behavior of oxygen and water molecule.