Thermodynamic equation for the liquidus line of a narrow homogeneity range compoundA mBn(c)

1976 ◽  
Vol 7 (10) ◽  
pp. 1609-1610 ◽  
Author(s):  
R. F. Brebrick
Keyword(s):  
Homogeneity Range ◽  
Liquidus Line ◽  
Thermodynamic Equation ◽  
Narrow Homogeneity Range

Researching nitrogen solubility in nitrogen-containing austenitic steels at melting and recrystallization by CALPHAD method

2019 ◽  
pp. 53-66 ◽  
Author(s):  
L. A. Smirnov ◽  
I. I. Gorbachev ◽  
V. V. Popov ◽  
A. Yu. Pasynkov ◽  
A. S. Oryshchenko ◽  
...  
Keyword(s):  
Global Minimum ◽  
Nitrogen Solubility ◽  
Thermodynamic Description ◽  
Solidus Temperature ◽  
Liquidus Line ◽  
Calphad Method ◽  
Austenitic Steels ◽  
Nitrogen Transfer ◽  
Fixed Nitrogen ◽  
System Phase

The CALPHAD method has been employed to compose thermodynamic description of the Fe–Cr–Mn–Ni–Si–C–N system. Using an algorithm based on finding a global minimum of Gibbs energy, the calculations of system phase composition were performed in the temperature range from 1750°C to hardening and in the range of compositions corresponding to 04Kh20N6G11M2AFB steel. Calculations showed that at temperatures above liquidus line, Cr and Mn increase nitrogen solubility in the melt, while Ni and Si reduce it. With an increase in the content of Cr, Mn, Ni, and Si in steel in the studied composition range, both liquidus and solidus temperature decrease. The degree of influence on these temperatures of Cr, Mn, Ni and Si within the steel grade is different and ranges from ~3 to ~14°C. Calculations taking into account the possibility of nitrogen transfer between steel and the atmosphere of air showed that the amount of fixed nitrogen in the alloy under study varies, depending on the composition of the steel and temperature, from ~0.3 to ~0.6 wt%. As the temperature decreases from liquidus to solidus, the amount of fixed nitrogen increases, with the exception of those steel compositions when ferrite and not austenite is released from the liquid phase.

Strukturvarianten des MgCu2-Typs: Die Verbindungen Mg2Ni3P und Mg2Ni3As / Variants of the MgCu2 Type: The Compounds Mg2Ni3P and Mg2Ni3As

1992 ◽  
Vol 47 (10) ◽  
pp. 1351-1354 ◽  
Author(s):  
Viktor Keimes ◽  
Albrecht Mewis
Keyword(s):  
Single Crystal ◽  
Homogeneity Range ◽  
Hexagonal Lattice ◽  
Structure Type ◽  
Type Structure ◽  
X Ray ◽  
Lattice Constants ◽  
Metal Atoms ◽  
Rhombohedral Symmetry

The compounds Mg2Ni3P and Mg2Ni3As were prepared by heating the elements. Their structures have been determined from single-crystal X-ray data. The structure of the phosphide is a rhombohedral ternary variant of the cubic Laves structure type MgCu2 (R 3̄ m; hexagonal lattice constants: a = 4.971(0) Å, c = 10.961(2) Å). The ordered substitution of one quarter of the metal atoms by phosphorus and the resulting shorter distances are responsible for the rhombohedral symmetry.The arsenide crystallizes in the MgCu2 type structure (Fd 3 m; a = 6.891(1)A, composition Mg2Ni3As) with a statistic distribution of the Ni and As atoms; the relevant homogeneity range extends from Mg2Ni2.9As1.1 to Mg2Ni3.5As0.5.

Three important calorimetric applications of a classic thermodynamic equation

2003 ◽  
Vol 32 (5) ◽  
pp. 264 ◽  
Author(s):  
Michael J. Blandamer ◽  
Paul M. Cullis ◽  
Peter T. Gleeson
Keyword(s):  
Thermodynamic Equation

Physical properties of SmS in its homogeneity range

1973 ◽  
Vol 18 (1) ◽  
pp. 63-69 ◽  
Author(s):  
V. P. Zhuze ◽  
E. V. Goncharova ◽  
N. F. Kartenko ◽  
T. I. Komarova ◽  
L. S. Parfeneva ◽  
...  
Keyword(s):  
Physical Properties ◽  
Homogeneity Range

The NbB2-phase revisited: Homogeneity range, defect structure, superconductivity

2005 ◽  
Vol 53 (13) ◽  
pp. 3679-3687 ◽  
Author(s):  
Carlos Angelo Nunes ◽  
Dariusz Kaczorowski ◽  
Peter Rogl ◽  
Márcia Regina Baldissera ◽  
Paulo Atsushi Suzuki ◽  
...  
Keyword(s):  
Homogeneity Range ◽  
Defect Structure
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