Gallium–Germanium–Indium System: Excess Functions of Formaion of Liquid Alloys and Liquidus surface of Phase Diagram

1982 ◽  
Vol 21 (3) ◽  
pp. 273-279 ◽  
Author(s):  
J. de Franceschi ◽  
M. Fornaris ◽  
M. Gambino ◽  
J. P. Bros
Keyword(s):  
Phase Diagram ◽  
Liquidus Surface ◽  
Excess Functions ◽  
Liquid Alloys

Enthalpy of Formation of Gallium-Germanium-Tin Liquid Alloys: Evaluation of the Liquidus Surface of the Phase Diagram from Excess Functions of Mixing

1980 ◽  
Vol 35 (11) ◽  
pp. 1256-1264 ◽  
Author(s):  
M. Fornaris ◽  
Y. M. Muggianu ◽  
M. Gambino ◽  
J. P. Bros
Keyword(s):  
Phase Diagram ◽  
High Temperature ◽  
Enthalpy Of Formation ◽  
Binary Systems ◽  
Liquidus Surface ◽  
Enthalpies Of Formation ◽  
Excess Functions ◽  
Liquid Alloys ◽  
Calvet Calorimeter ◽  
Excess Functions Of Mixing

Abstract With a differential high temperature Calvet calorimeter, the enthalpies of formation of Ga-Ge-Sn liquid alloys have been measured at 703, 798, 895, 1000 and 1230 K in the whole concentration area. The experimental results are compared with those obtained by using an interpolation relation on the basis of the excess functions of mixing of the bordering binary systems. The interpolation relation is used to calculate the partial excess functions and to determine the position of the liquidus surface of the Ga-Ge-Sn phase diagram: the experimental and calculated values agree fairly.

Modification of Al-Si Microstructure - The Al-Si-Sr Phase Diagram from 0–20 WT. % Si and 0–5.0 WT. % Sr

1982 ◽  
Vol 19 ◽  
Author(s):  
M. D. Hanna ◽  
A. Hellawell
Keyword(s):  
Thermal Analysis ◽  
Phase Diagram ◽  
Liquid Metal ◽  
Alkali Metal ◽  
Alkaline Earth ◽  
Liquidus Surface ◽  
Eutectic Silicon ◽  
Alkaline Earth Metals ◽  
Current Interest

ABSTRACTIt is well known that the morphology of primary and eutectic silicon resulting from solidification is sensitive to minor impurity additions: “modification” by alkali and alkaline earth metals is common foundry practice and the use of strontium is of recent and current interest because its effect is retained in liquid metal for relatively long times. The mechanism for modification remains obscure and is not necessarily the same from one elemental addition to the next, but it is essential to separate the equilibrium and kinetic influences if the phenomenon is to be better understood. Accordingly, the liquidus surface and eutectic reactions have been located in the relevant part of the Al-Si-Sr system by careful thermal analysis and the results correlated with the microstructure. Comparison is made with the parallel behavior of alkali metal additions.

The Al–Cr–Fe phase diagram. II. Liquidus surface and phase equilibria for crystallization of 58–100 at.% Al alloys

2011 ◽  
Vol 50 (3-4) ◽  
pp. 217-229 ◽  
Author(s):  
V. G. Khoruzha ◽  
K. E. Kornienko ◽  
D. V. Pavlyuchkov ◽  
B. Grushko ◽  
T. Ya. Velikanova
Keyword(s):  
Phase Diagram ◽  
Phase Equilibria ◽  
Liquidus Surface ◽  
Al Alloys

Determination of the Dynamic Viscosity of Liquid Alloys from the Phase Diagram

2018 ◽  
Vol 48 (9) ◽  
pp. 578-584
Author(s):  
V. P. Malyshev ◽  
A. M. Makasheva
Keyword(s):  
Phase Diagram ◽  
Dynamic Viscosity ◽  
Liquid Alloys

Convective instabilities during the solidification of an ideal ternary alloy in a mushy layer

2010 ◽  
Vol 647 ◽  
pp. 309-333 ◽  
Author(s):  
DANIEL M. ANDERSON ◽  
GEOFFREY B. McFADDEN ◽  
SAM R. CORIELL ◽  
BRUCE T. MURRAY
Keyword(s):  
Phase Diagram ◽  
Ternary Alloy ◽  
Liquidus Surface ◽  
Point Of View ◽  
Mushy Layer ◽  
Convective Instabilities ◽  
Diffusive Modes ◽  
Diffusion Convection ◽  
Static Point ◽  
Double Diffusive

We consider a model for the solidification of an ideal ternary alloy in a mushy layer that incorporates the effects of thermal and solutal diffusion, convection and solidification. Our results reveal that although the temperature and solute fields are constrained to the liquidus surface of the phase diagram, the system still admits double-diffusive modes of instability. Additionally, modes of instability exist even in situations in which the thermal and solute fields are each individually stable from a static point of view. We identify these instabilities for a general model in which the base-state solution and its linear stability are computed numerically. We then highlight these instabilities in a much simpler model that admits an analytical solution.

Phase Diagram Relationships in the Ternary System Ti-Ai-V

1990 ◽  
Vol 213 ◽  
Author(s):  
Mohan Paruchuri ◽  
T.B. Massalski
Keyword(s):  
Phase Diagram ◽  
Isothermal Section ◽  
Solid State ◽  
Ternary System ◽  
Phase Equilibria ◽  
Liquidus Surface ◽  
Experimental Techniques

ABSTRACTLiquid-solid and solid state phase equilibria in the ternary system Ti-Al-V have been studied using a combination of several experimental techniques. A likely surface of primary seperation (i.e., the liquidus surface) is proposed in the form of the usual projection on the triangular base and the directions of the monovariant lines are defined. Four ternary invariant reactions have been identified in this system. Solid state equilibria have been determined at 900°C and are presented in the form of an isothermal section through the phase diagram. These are very similar to the relationships reported at 800°C by Hashimoto et al. [1].

scholarly journals Self-Associated Atomic Groups in Ga–Sn Liquid Alloys

2021 ◽  
Vol 66 (4) ◽  
pp. 327
Author(s):  
R. Bilyk ◽  
S. Mudry
Keyword(s):  
Phase Diagram ◽  
Surface Tension ◽  
Structure Data ◽  
Pair Correlation ◽  
Liquid Alloys ◽  
Structure Parameters ◽  
Main Structure ◽  
Structure Factors ◽  
Temperature Dependences ◽  
Different Temperatures

The structures of a liquid eutectic alloy and one corresponding to the near-equatomic concentration in the phase diagram are investigated at different temperatures. The structure factors and pair correlation functions have been analyzed and interpreted. The temperature dependences of main structure parameters determined from these functions allowed us to suppose that the atomic distribution in both alloys is characterized by a tendency to the interaction of like-kind atoms. In addition, the structure data and the results on the density and surface tension are analyzed as well.

scholarly journals Thermodynamic modeling of liquidus surface of the phase diagram of Cu2O–Al2O3–ZrO2 system

2015 ◽  
Vol 15 (4) ◽  
pp. 15-21 ◽  
Author(s):  
O.V. Samoylova ◽  
◽  
G.G. Mikhailov ◽  
L.A. Makrovets ◽  
E.A. Trofimov ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Modeling ◽  
Liquidus Surface ◽  
Zro2 System

scholarly journals DETERMINATION AND MODELING OF THE LIQUIDUS SURFACE, VAPOR PRESSURE AND IMMISCIBILITY BOUNDARIES IN THE Cu–Pb–S SYSTEM

2021 ◽  
Vol 0 (4) ◽  
pp. 35-42
Author(s):  
N.B. Babanly ◽  
◽  
M.V. Bulanova ◽  
A.N. Mustafaeva ◽  
A.N. Mammadov ◽  
...  
Keyword(s):  
Vapor Pressure ◽  
Lead Sulfide ◽  
Liquidus Surface ◽  
Electronic Conductivity ◽  
Liquid Alloys ◽  
Critical Temperatures ◽  
Crystallization Surface ◽  
Rich Liquid ◽  
P Type ◽  
First Time

For the first time using a membrane zero-manometer, the vapor pressure S2 over the surface of the PbS liquidus in the ternary system Cu–Pb–S were determined in the range 1100÷1400 K and 0÷760 mm Hg. Based on the thermodynamic calculation, the boundaries of the immiscibility of liquid alloys of the Cu–S, Pb–S, and Cu–Pb–S systems were determined and analytically described. Critical temperatures and pressures for immiscibility regions of sulfur-rich liquid alloys are characterized by high values: Tcr= 1520÷1880 K; Pcr=170÷510 atm. The crystallization surfaces of lead sulfide with electronic conductivity (p-type PbS) and with hole conductivity (n-type PbS) are calculated and analytically de-scribed, as well as the corresponding values of sulfur vapor pressure over the crystallization surface of lead sulfide. All analytical dependencies for 3D modeling were obtained and visualized using the OriginLab computer program

The Al2O3–HfO2–Y2O3 phase diagram. II. Liquidus surface

2009 ◽  
Vol 48 (11-12) ◽  
pp. 693-699 ◽  
Author(s):  
S. M. Lakiza ◽  
Ya. S. Tishchenko ◽  
A. O. Sus ◽  
Z. O. Zaitseva ◽  
L. M. Lopato
Keyword(s):  
Phase Diagram ◽  
Liquidus Surface
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