Diffusion of Scandium in Single Crystal Aluminum Oxide.
Abstract
The diffusion of scandium in single crystal aluminum oxide was studied using the Sc46 isotope as a radiotracer. An improved Gruzin method was used to determine the diffusion coefficients at various temperatures and oxygen partial pressures. The temperatures ranged between 1110C and 1465C. The oxygen partial pressures were 1 atmosphere and .0001 atmospheres. The dependence of the diffusion coefficient upon oxygen partial pressure was investigated to determine the type of mechanism controlling the diffusion of scandium in aluminum oxide. The dependence was observed to be very small. This tended to favor the Frenkl defect (formation of aluminum ion interstitials) mechanism as the primary controlling mechanism of the diffusion. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1974
- Accession Number
- AD0780626
Entities
People
- James E. Dockendorff
Organizations
- Air Force Institute of Technology