Production and comparative analysis of the diffusion barrier properties of Ni-W and Ni-Re coatings.
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| Title: | Production and comparative analysis of the diffusion barrier properties of Ni-W and Ni-Re coatings. |
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| Authors: | Aksenov, A. N.1 (AUTHOR) 9123975423@mail.ru, Burdina, K. P.2 (AUTHOR) burdinakp@tyuiu.ru, Andreev, O. I.1 (AUTHOR) o.andreev@tmotor.ru, Kirpichnikova, E. P.1 (AUTHOR) kirpichnikova.elizaveta@mail.ru |
| Source: | Metallurgist. Mar2026, Vol. 69 Issue 11, p1738-1745. 8p. |
| Subjects: | Diffusion barriers, Protective coatings, Heat resistant alloys, Diffusion coatings, Heat treatment, Coating processes, Annealing of metals, Electroplating |
| Abstract: | This article examines international and domestic experience in applying diffusion barriers made of refractory heavy elements (e.g., Ir, Re, and W) on heat-resistant nickel alloys to reduce diffusion fluxes at the substrate-coating interface. A procedure for producing experimental samples of Re/NiAl and W/NiAl compositions using electrochemical and powder-based coating techniques, which was implemented at the Industrial University of Tyumen, is presented. Comparative tests of the obtained diffusion barriers were conducted under high-temperature and homogenizing vacuum annealing conditions (1050 ± 10 °C and 1170 ± 10 °C). Experimental results indicate that the Ni‑W diffusion barrier is inferior in stability to the Ni-Re barrier, as evidenced by significant contamination of the surface layer of the W/NiAl coating by substrate elements. The main parameters and characteristics of W and Re that most significantly influence their diffusivity are discussed. Conclusions are drawn regarding the feasibility of using coatings with a Ni-Re diffusion barrier on hot gas path components of land-based gas turbines. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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