Journal ArticleDOI
Thermodynamics and phase diagram of the Fe-C system
TLDR
A critical review of published data provides a fairly accurate knowledge of the thermodynamic properties of all of the phases of the system Fe-C that are stable or metastable at atmospheric pressure as discussed by the authors.Abstract:
A critical review of published data provides a fairly accurate knowledge of the thermodynamic properties of all of the phases of the system Fe-C that are stable or metastable at atmospheric pressure. Selected data are shown as tables and equations. A proposed phase diagram differs only slightly from others recently published but has the following features. Peritectic compositions and the α-γ equilibrium are shown to agree with measured values of the activity of iron in the solid and liquid solutions and the thermodynamic properties of pure iron. Of all the reported carbides of iron only two may be studied under equilibrium conditions. The solubilities of cementite and of χ-carbide in α-Fe are deduced from measured equilibria. Both are metastable at all temperatures with respect to graphite and its saturated solution in iron. The χ-carbide becomes more stable than cementite below about 230° Certain published data on e-carbide permit an estimate of its free energy as a precipitate during the aging process.read more
Citations
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On the heat of formation of solid alloys. II
TL;DR: In this article, it has been shown that a relatively simple atomic model does account for the sign of the heat of formation, ΔH, in a wide variety of alloy systems.
Journal ArticleDOI
Invited review: Carbides and nitrides in steel
D.H. Jack,K.H. Jack +1 more
TL;DR: In this paper, the crystal chemistry and the occurrence of carbides and nitrides in steels are reviewed and the characteristics of nitrogen are emphasised and are related to the behaviour of carbon.
Journal ArticleDOI
Universal Segregation Growth Approach to Wafer-Size Graphene from Non-Noble Metals
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Journal ArticleDOI
Melting in the Fe–C system to 70 GPa
Oliver T. Lord,Michael J. Walter,Rajdeep Dasgupta,Rajdeep Dasgupta,David Walker,Simon M. Clark +5 more
TL;DR: In this article, the authors determined high-pressure melting curves for Fe3C, Fe7C3 and the Fe-Fe3C eutectic using laser-heated diamond anvil cell techniques.
References
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Journal ArticleDOI
Thermodynamics of liquid Fe-C solutions
TL;DR: The activity of carbon in liquid iron has been determined at low concentrations by means of the CO-CO2 equilibrium and at high concentrations by the solubility of graphite as mentioned in this paper.
Journal ArticleDOI
Equilibria in the Systems Fe2C—Fe—CH4—H2 and Fe3C—Fe—CH4—H21
Journal ArticleDOI
Die spezifische Wärme von Eisen, Kobalt und Nickel im Bereich hoher Temperaturen
M. Braun,R. Kohlhaas +1 more
TL;DR: In this article, a quasiadiabatic operating calorimeter was used to measure the specific heat of three metals, namely, iron, cobalt, and nickel, in the range from room temperature to a temperature near the melting point of each metal.
Journal ArticleDOI
Thermodynamische Untersuchungen zum System Eisen–Kohlenstoff–Sauerstoff
H. Dünwald,Carl Wagner +1 more