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Наносистемы: физика, химия, математика, 2014, том 5, выпуск 4, страницы 486–493
(Mi nano879)
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Ab-initio study of Re and Ru effect on stability of TCP nanoparticles in Ni-based superalloys
N. I. Medvedeva, A. L. Ivanovskii Institute of Solid State Chemistry UB RAS, Ekaterinburg, Russia
Аннотация:
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.
Ключевые слова:
ab initio calculations, rhenium effect, superalloys.
Поступила в редакцию: 16.06.2014 Исправленный вариант: 30.06.2014
Образец цитирования:
N. I. Medvedeva, A. L. Ivanovskii, “Ab-initio study of Re and Ru effect on stability of TCP nanoparticles in Ni-based superalloys”, Наносистемы: физика, химия, математика, 5:4 (2014), 486–493
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/nano879 https://www.mathnet.ru/rus/nano/v5/i4/p486
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