Kinetics and Mechanism of the Oxidation of Molybdenum

摘要: The rates of formation the different oxides on molybdenum in pure oxygen at 1 atm pressure have been determined temperature range 500° to 770°C. rate vaporization MoOs is linear with time, and energy activation for its 53,000 cal per mol below 650°C 89,600 temperatures above 650°C. ratio Mo03(vaporizing)/Mo03(surface) increases a complicated manner time temperature. There maximum total oxidation 600°C. At 600°C, an 48,900 Mo08 has evaluated. suboxide Mo02 does not increase beyond very small critical thickness. 725°C, catastrophic autocatalytic nature was encountered. Pronounced pitting metal found occur 550° Marker movement experiments indicate that grow almost entirely by diffusion anions.