Weak Bonding of Alumina Coatings on Ni(111)
CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY AND BIOCHEMISTRY
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We examine the structure and stability of an ultrathin ceramic film coating a metal substrate, specifically an alpha-alumina, Al2O3, film grown on fcc nickel. This metal-ceramic interface may play a role in materials failure of current combustion engine thermal barrier coatings TBCs. We characterize the 0 0 0 1 surface of alpha-Al2O3 and study the effect of increasing alumina film thickness on the aluminanickel interface using periodic slab density functional theory within the generalized gradient approximation.
- Ceramics, Refractories and Glass
- Coatings, Colorants and Finishes
- Properties of Metals and Alloys