Geodesic
Ab-initio study of Re and Ru effect on stability of TCP nanoparticles in Ni-based superalloys
Nanosistemy: fizika, himiâ, matematika, Tome 5 (2014) no. 4, pp. 486-493.

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Modern nickel-based superalloys contain high concentrations of rhenium that allows the improvement of their creep strength. The high levels of rhenium, however, results in the formation of topologically close-packed phases (TCP) which have a negative influence on its properties. The addition of ruthenium was found to reduce the precipitation of nano-sized TCP phases, but the reasons have not been established. In this paper, by using an ab-initio approach, we studied the effect of rhenium and ruthenium on the structural properties of Ni matrix as well as the TCP phases. We demonstrate that Cr, Mo and W are the most effective additions to provoke the formation of TCP phases, whereas ruthenium has a destabilizing effect.
Keywords: rhenium effect, superalloys.
Mots-clés : ab initio calculations 
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     title = {Ab-initio study of {Re} and {Ru} effect on stability of {TCP} nanoparticles in {Ni-based} superalloys},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
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     publisher = {mathdoc},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2014_5_4_a3/}
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N. I. Medvedeva; A. L. Ivanovskii. Ab-initio study of Re and Ru effect on stability of TCP nanoparticles in Ni-based superalloys. Nanosistemy: fizika, himiâ, matematika, Tome 5 (2014) no. 4, pp. 486-493. http://geodesic.mathdoc.fr/item/NANO_2014_5_4_a3/