4397-C INITIAL STAGES OF OXIDATION OF METALS.
Final rept. for 1 Jul 63-31 Jul 64,
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
Pagination or Media Count:
The results of study of the initial stages of oxidation of molybdenum at temperatures less than 1000K are quite similar to those obtained for tungsten and tantalum in earlier studies. A high-voltage D C pulsing unit has enabled uninterrupted elevated temperature observation of the reaction of oxygen with molybdenum. The temperature range studied is 300 - 1000K. Although the utilization of this technique is in the preliminary stages, it is certain to enhance the versatility of field emission microscopy in the study of gas-metal reactions. This technique will be utilized in this laboratory as a major approach in the study of initial stages of oxidation of metals at temperatures less than 1000K. The effect of nonoxidizing gases, present as impurities in the oxidizing atmosphere, in altering the reaction kinetics has been studied further. In order to determine the extent of the effect fully, a mass spectrometer will be used to determine the concentration of gases present in the oxidizing chamber.