Thermodynamic assessment of Hafnium Iridium binary system

2018 ◽  
Vol 115 (5) ◽  
pp. 503 ◽  
Author(s):  
Mohamed Idbenali ◽  
Colette Servant ◽  
M’barek Feddaoui
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Thermodynamic Assessment ◽  
Phase Diagram Data ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Calphad Approach ◽  
Stoichiometric Compound ◽  
Sublattice Model ◽  
Good Agreement

The Hf–Ir system has been thermodynamically modeled by the CALPHAD approach. Hf2Ir, αHfIr, βHfIr, γHfIr (high temperature phase) and HfIr3 which have a homogeneity range, were treated as the formula (Hf,Ir)x:(Ir,Hf)1−x by a two-sublattice model with a mutual substitution of Hf and Ir in both sublattices.Hf5Ir3 has been treated as a stoichiometric compound while a solution model has been used for the description of the FCC (Ir) solid solution. Additionally, two different models describing the excess Gibbs energy for the liquid and for the solid solutions (BCC, FCC and HCP) were used and their predictions are compared. The calculations based on the thermodynamic modeling are in good agreement with the phase diagram data and experimental thermodynamic values available in the literature.

Thermodynamic Assessment of SiO2-ZrO2 Binary System

2014 ◽  
Vol 628 ◽  
pp. 73-78 ◽  
Author(s):  
Hong Mei Chen ◽  
Jian Mei Chen ◽  
Song Wang ◽  
Wu Tao Li ◽  
Fan Gui Meng ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Binary System ◽  
Thermodynamic Assessment ◽  
Phase Diagram Data ◽  
Solution Model ◽  
Calphad Approach ◽  
Experimental Phase ◽  
Experimental Phase Diagram ◽  
Substitutional Solution Model ◽  
Self Consistent

The SiO2-ZrO2binary system has been thermodynamically assessed with CALPHAD approach. The substitutional solution model is adopted for liquid. A set of self-consistent parameters capable of reproducing the corresponding experimental phase diagram data and liquidus immiscibility data has been obtained.

Thermodynamic Assessment of B2O3-SiO2 Binary System

2014 ◽  
Vol 628 ◽  
pp. 68-72
Author(s):  
Hong Mei Chen ◽  
Jian Mei Chen ◽  
Song Wang ◽  
Wu Tao Li ◽  
Fan Gui Meng ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Binary System ◽  
Thermodynamic Assessment ◽  
Phase Diagram Data ◽  
Solution Model ◽  
Calphad Approach ◽  
Experimental Phase ◽  
Experimental Phase Diagram ◽  
Substitutional Solution Model ◽  
Self Consistent

The B2O3-SiO2binary system has been thermodynamically reassessed with CALPHAD approach. The substitutional solution model is adopted for liquid. A set of self-consistent parameters capable of reproducing the corresponding experimental phase diagram data and subliquidus immiscibility data has been obtained.

Anisotropy of thermal expansion of 0.85 Na2CrO4 · 0.15 Na2CO3

1983 ◽  
Vol 164 (3-4) ◽  
Author(s):  
B. N. Mehrotra
Keyword(s):  
Phase Diagram ◽  
Sodium Carbonate ◽  
Radial Growth ◽  
High Temperature Phase ◽  
Miscibility Gap ◽  
Temperature Phase ◽  
Sodium Chromate ◽  
Thermal Methods ◽  
X Ray ◽  
Anisotropy Of Thermal Expansion

AbstractThe phase diagram of the binary system sodium chromate-sodium carbonate has been studied using X-ray and thermal methods. The system shows a large miscibility gap at low as well as at high temperatures. The sodium carbonate rich part yields zone information. Sodium chromate rich crystals show dendritic and radial growth. The hexagonal high-temperature phase of mixed crystals with composition 85 × Na

High pressure–high temperature phase diagram of InSe

2004 ◽  
Vol 24 (1) ◽  
pp. 111-116 ◽  
Author(s):  
G. Ferlat ◽  
D. Martínez-García ◽  
A. San Miguel ◽  
A. Aouizerat ◽  
V. Muñoz-Sanjosé
Keyword(s):  
Phase Diagram ◽  
High Pressure ◽  
High Temperature ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
High Pressure High Temperature ◽  
Temperature Phase Diagram

Revision of the Li–Si Phase Diagram: Discovery and Single-Crystal X-ray Structure Determination of the High-Temperature Phase Li4.11Si

2013 ◽  
Vol 25 (22) ◽  
pp. 4623-4632 ◽  
Author(s):  
Michael Zeilinger ◽  
Iryna M. Kurylyshyn ◽  
Ulrich Häussermann ◽  
Thomas F. Fässler
Keyword(s):  
Phase Diagram ◽  
High Temperature ◽  
Single Crystal ◽  
Structure Determination ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
X Ray

Magnetic Phase Diagram and Magnetization Dynamics of Frustrated Spin-Chain Compounds

2009 ◽  
Vol 152-153 ◽  
pp. 233-236 ◽  
Author(s):  
Yu. B. Kudasov
Keyword(s):  
Phase Diagram ◽  
Low Temperature ◽  
Nearest Neighbor ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Magnetization Dynamics ◽  
Ising Spin ◽  
Glauber Theory

The magnetic phase diagram of Ising spin chains packed into the frustrated triangular lattice is discussed. A structure of a low-temperature phase depends strongly on interactions between the next-to-nearest-neighbor chains because they lift the degeneracy of the triangular AFM Ising model. That is why, a variety of low-temperature phases is observed in CsCoCl3, Ca3Co2O6, and Sr5Rh4O12. On the contrary, the high-temperature phase (honeycomb AFM structure) is unique. The frustrated Ising chain systems demonstrate an unusual and very slow magnetization dynamics. A model of the magnetization dynamics similar to the Glauber theory is developed.

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