| Autor: |
Volkhonskii, A. O., Blinkov, I. V., Levinskii, Yu. V., Belov, D. S. |
| Zdroj: |
Russian Metallurgy (Metally); Nov2018, Vol. 2018 Issue 11, p1088-1093, 6p |
| Abstrakt: |
Abstract: The thermal stability and the heat resistance of TiAlN-Cu and TiAlN-Ni coatings are studied. The phase compositions of the coatings are found to be unchanged upon annealing at temperatures up to 700°C in a vacuum of 10-5 Pa. As the annealing temperature increases to 800°C, the lattice parameter of the nitride phase increases to near-stoichiometric TiNx, the microstrains decrease, and the coherent domain sizes increase. The calculated diffusion coefficients of oxygen in the coatings upon heating in the temperature range 600-800°C demonstrate higher protective properties (high-temperature oxidation resistance) of the TiAlN-Ni coatings as compared to the TiAlN-Cu coatings, which is caused by the formation of a barrier layer based on NiO, TiO2, and TiNiO3 oxides. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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