Interdiffusion and Association Phenomena in the System, NiO-Al2O3.
Abstract
The rate of formation of NiAl2O4 by reaction between single crystals of NiO and Al2O3 is described. In NiO the behavior of D as a function of concentration supports the Lidiard theory of diffusion by impurity-vacancy pairs. A good fit of the theory to the experimental results was obtained by assuming that aluminum ions diffuse as (AlNiVNi) pairs. The free energy of association for pairs was calculated. The interdiffusion coefficients in the spinel showed a constant small increase with the increase of the aluminum ions dissolved in the spinel. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1973
- Accession Number
- AD0774732
Entities
People
- V. S. Stubican
- W. J. Minford
Organizations
- Pennsylvania State University