Effect of platinum on the oxide-to-metal adhesion in thermal barrier coating systems
β Scribed by H. M. Tawancy; A. UI-Hamid; N. M. Abbas; M. O. Aboelfotoh
- Book ID
- 106393566
- Publisher
- Springer
- Year
- 2008
- Tongue
- English
- Weight
- 893 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0022-2461
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π SIMILAR VOLUMES
## Abstract Platinum is added to thermal barrier coatings (TBCs) as it is observed empirically to extend their lifetime, but the mechanism by which Pt acts is unknown. Since Pt has been proposed to alter diffusivities in NiAl, a key component of TBCs, we use firstβprinciples quantum mechanics calcu
First-principles density functional theory calculations are used to study Al diffusion in b-NiAl. The activation energy and diffusion constant pre-exponential factors are calculated for five previously postulated Al diffusion mechanisms: next-nearest-neighbor Al jumps, the triple defect mechanism an