The Co–Ni–Zr Phase Diagram in the Zr–ZrCo–ZrNi Region II. Liquidus Surface of the Phase Diagram. Interaction of Alloys with Hydrogen

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.

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

Canadian Metallurgical Quarterly ◽

10.1179/cmq.1982.21.3.273 ◽

1982 ◽

Vol 21 (3) ◽

pp. 273-279 ◽

Cited By ~ 10

Author(s):

J. de Franceschi ◽

M. Fornaris ◽

M. Gambino ◽

J. P. Bros

Keyword(s):

Phase Diagram ◽

Liquidus Surface ◽

Excess Functions ◽

Liquid Alloys

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

Powder Metallurgy and Metal Ceramics ◽

10.1007/s11106-011-9321-1 ◽

2011 ◽

Vol 50 (3-4) ◽

pp. 217-229 ◽

Cited By ~ 7

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

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

Journal of Fluid Mechanics ◽

10.1017/s0022112009993740 ◽

2010 ◽

Vol 647 ◽

pp. 309-333 ◽

Cited By ~ 10

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.

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

MRS Proceedings ◽

10.1557/proc-213-143 ◽

1990 ◽

Vol 213 ◽

Cited By ~ 6

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].

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