Ambipolar diffusion and its application to diffusion creep
Conference
·
OSTI ID:4233361
A diffusional creep theory which takes into account the simultaneous occurrence of lattice and grain boundary diffusion for both anions and cations was developed for a polycrystalline ionic compound. The effects of grain size, soluble cation impurities of variable valence, and oxygen partial pressure on the relative contributions of lattice and grain boundary diffusion of the different ionic species were analyzed. Diffusional creep data for pure and doped, polycrystalline MgO, Al2O3 and BeO were analyzed in terms of various limiting conditions of the general creep theory.
- Research Organization:
- Utah Univ., Salt Lake City (United States). Div. of Materials Science and Engineering
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- NSA Number:
- NSA-31-023154
- OSTI ID:
- 4233361
- Report Number(s):
- COO--1591-25; CONF-740672--2; UTEC-MSE--74-067
- Country of Publication:
- United States
- Language:
- English
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