Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8023868 | Surface and Coatings Technology | 2018 | 51 Pages |
Abstract
The impedance responses of SSA top coat, TGO, and TGO-bond coat interface were reduced drastically after oxidation at 1100â¯Â°C for 10â¯h pre-oxidized specimen as compared to 20 and 30â¯h due to the compositional change of pure α-Al2O3 based TGO into more conductive NiCr2O4. The lowest diffusion coefficient, DCr3+ in the NiO lattice which reduced the formation of metal ion vacancies at the TGO-top coat interface caused to exhibit higher TGO resistance for 20â¯h pre-oxidized specimens over 10 and 30â¯h after oxidation at 1100â¯Â°C.
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Authors
T. Baskaran, Shashi Bhushan Arya,