THE MECHANISM OF OXIDE FORMATION IN THE INITIAL STAGES OF OXIDATION
Abstract
Research was conducted on the mechanism of oxide formation by means of a field emission microscope with a tungsten emission tip. Changes in the emission were observed as a result of adsorption of residual gases on the emission tip at room temperature. An improvement was made in the technique for producing field emission tubes by the development of a refractory masking material for pyrex. The high-vacuum technique was refined by the addition of a second getter to the system and the use of a H-purge at elevated temperatures to decontaminate the isolation trap. As adsorption increased the following changes were observed in emission pattern: (1) a gradual decrease followed by an increase in total integrated emission intensity; (2) a gradual decrease followed by an increase in local emission intensity of the area around (111) regions bounded by (211) regions; (3) an initial increase followed by a decrease in the size of the lowintensity regions around (110) and (211); and (4) an initial decrease followed by an increase in the size of the low intensity regions around (100).
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 14, 1961
- Accession Number
- AD0257035
Entities
People
- D.w. Rausch
- K.l. Moazed
- M.g. Fontana
Organizations
- Ohio State University