Development of oxygen activity sensor for scale surface on high temperature oxidation of alloys

在合金高温氧化过程中，氧化膜的生长依赖于大气供气、表面反应以及氧化膜中离子的扩散。因此，表面反应和供气降低了结垢表面的氧势。本文研究了由带电极的稳定的氧化锆氧传感器产生的电动势引起的铁高温氧化过程中氧势的分布。在Ar-1%O2气氛中，氧势随接近氧化膜而降低，表面反应的氧势差约为-300kJmol^&lt；-1&gt；

In high-temperature oxidation of alloy, a growth of the oxide scale is depends on the gas supply from the atmosphere, surface reaction, and ionic diffusion in the oxide scale. Therefore, the oxygen potential of the scale surface is reduced by surface reaction and gas supply. Present study revealed that the distribution of oxygen potentials on high temperature oxidation of iron from the atmosphere to the scale surface by electromotive forces caused by a stabilized ZrO2 oxygen sensor with electrodes. In Ar-1% O2 atmosphere, the oxygen potential decreases with approaching the oxide film, the difference between the oxygen potential in the surface reaction was about-300kJmol^<-1>.