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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2010, Volume 91, Issue 3, Pages 154–157
(Mi jetpl646)
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This article is cited in 27 scientific papers (total in 27 papers)
CONDENSED MATTER
Composition of cementite in the dependence on the temperature. In situ neutron diffraction study and Ab initio calculations
V. I. Voronina, I. F. Bergerab, Yu. N. Gornostyreva, V. N. Urcevc, A. R. Kuznetsova, A. V. Shmakovc a Institute of Metal Physics, Ural Division of the Russian Academy of Sciences
b Institute of Solid State Chemistry, Urals Branch of the Russian Academy of Sciences
c Research & Technological Centre Ausferr limited liability company
Abstract:
The structure state of carbon eutectoid steel has been studied by the in situ neutron diffraction method in the temperature range from room temperature to 800°C. It has been shown that an increase in the temperature is accompanied by a decrease in the concentration of carbon in cementite, whereas its weight fraction and the parameters of the orthorhombic lattice change slightly. The ab initio calculations of the nonstoichiometric carbides Fe3C x (0 < x < 1) indicate that the structure of cementite remains stable upon the appearance of vacancies in the carbon sublattice with a relatively low formation energy. Thus, cementite should be considered as an interstitial phase Fe3C x with a wide homogeneity range.
Received: 28.12.2009
Citation:
V. I. Voronin, I. F. Berger, Yu. N. Gornostyrev, V. N. Urcev, A. R. Kuznetsov, A. V. Shmakov, “Composition of cementite in the dependence on the temperature. In situ neutron diffraction study and Ab initio calculations”, Pis'ma v Zh. Èksper. Teoret. Fiz., 91:3 (2010), 154–157; JETP Letters, 91:3 (2010), 143–146
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https://www.mathnet.ru/eng/jetpl646 https://www.mathnet.ru/eng/jetpl/v91/i3/p154
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Abstract page: | 310 | Full-text PDF : | 123 | References: | 45 |
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