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Miscibility gap. Region 1: homogenous α is stable. Region 2: homogenous α i...
Available to PurchasePublished: 01 December 2004
Fig. 4 Miscibility gap. Region 1: homogenous α is stable. Region 2: homogenous α is metastable, only incoherent phases can nucleate. Region 3: homogeneous α metastable, coherent phases can nucleate. Region 4: homogeneous α unstable, spinodal decomposition occurs. Source: Ref 4
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Image
Binary phase diagram with a minimum in the liquidus and a miscibility gap i...
Available to PurchasePublished: 01 December 1998
Fig. 5 Binary phase diagram with a minimum in the liquidus and a miscibility gap in the solid state
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Binary phase diagram with a minimum in the liquidus and a miscibility gap i...
Available to PurchasePublished: 27 April 2016
Fig. 5 Binary phase diagram with a minimum in the liquidus and a miscibility gap in the solid state
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Image
Miscibility gap. Region 1: Homogenous α is stable. Region 2: Homogenous α i...
Available to PurchasePublished: 27 April 2016
Fig. 16 Miscibility gap. Region 1: Homogenous α is stable. Region 2: Homogenous α is metastable; only incoherent phases can nucleate. Region 3: Homogeneous α is metastable; coherent phases can nucleate. Region 4: Homogeneous α is unstable; spinodal decomposition occurs. Source: Ref 10
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Book Chapter
Au (Gold) Ternary Alloy Phase Diagrams
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006234
EISBN: 978-1-62708-163-4
... miscibility gap; Au-Cu-Ni liquidus projection; Au-Cu-Ni miscibility gap at 400 degrees centigrade; Au-Cu-Ni miscibility gap at 700 degrees centigrade; and Au-Sn-Te liquidus projection. ternary alloy phase diagrams miscibility gap liquidus projection gold alloys THIS ARTICLE includes systems...
Abstract
This article is a compilation of ternary alloy phase diagrams for which gold (Au) is the first-named element in the ternary system. The diagrams are presented with element compositions in weight percent. The article includes five phase diagrams: Au-Cu-Ni boundaries of solid-state miscibility gap; Au-Cu-Ni liquidus projection; Au-Cu-Ni miscibility gap at 400 degrees centigrade; Au-Cu-Ni miscibility gap at 700 degrees centigrade; and Au-Sn-Te liquidus projection.
Image
Schematic binary phase diagram with a minimum in the liquidus and a miscibi...
Available to PurchasePublished: 27 April 2016
Fig. 1 Schematic binary phase diagram with a minimum in the liquidus and a miscibility gap in the solid state. Source: Ref 1
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Image
Regions of spinodal decomposition and classical nucleation and growth of pr...
Available to PurchasePublished: 01 December 2004
Fig. 2 Regions of spinodal decomposition and classical nucleation and growth of precipitates. (a) Phase diagram with a miscibility gap. (b) Variation in free energy with composition for the system shown in (a) at temperature T ′. Source: Ref 2
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Image
Regions of spinodal decomposition and classical nucleation and growth of pr...
Available to PurchasePublished: 27 April 2016
Fig. 14 Regions of spinodal decomposition and classical nucleation and growth of precipitates. (a) Phase diagram with a miscibility gap. (b) Variation in free energy with composition for the system shown in (a) at temperature T ′. Source: Ref 8 as published in Ref 9
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Gibbs free-energy curves of α and β phases in titanium-molybdenum at 873 K ...
Available to Purchase
in Modeling and Simulation of Microstructure Evolution during Heat Treatment of Titanium Alloys
> Heat Treating of Nonferrous Alloys
Published: 01 June 2016
Fig. 33 Gibbs free-energy curves of α and β phases in titanium-molybdenum at 873 K (600 °C) based on the newest Pandat database ( c 0 = 4.66 wt%). There is a miscibility gap within the β phase, and the spinodal region is between c Mo = 28 to 71 wt%. The intersection between the free
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Image
Schematic binary phase diagrams with invariant points. (a) Hypothetical dia...
Available to PurchasePublished: 27 April 2016
Fig. 2 Schematic binary phase diagrams with invariant points. (a) Hypothetical diagram with miscibility gap in the solid that touches the solidus curve at invariant point P ; an actual diagram of this type probably does not exist. (b) and (c) Typical eutectic diagrams for (b) components
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Image
Binary phase diagrams with invariant points. (a) Hypothetical diagram of th...
Available to PurchasePublished: 01 December 1998
Fig. 6 Binary phase diagrams with invariant points. (a) Hypothetical diagram of the type of shown in Fig. 5 , except that the miscibility gap in the solid touches the solidus curve at invariant point P ; an actual diagram of this type probably does not exist. (b) and (c) Typical eutectic
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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003732
EISBN: 978-1-62708-177-1
... above the critical temperature ( T c ), the binary system is in the region of full solid solubility with a single-phase field (α 0 ) at temperature T 0 . When the temperature goes below the critical temperature, a miscibility gap exists where a single-phase homogenous microstructure is no longer...
Abstract
Spinodal transformation is a phase-separation reaction that occurs from kinetic behavior. This article discusses the theory of spinodal decomposition, and outlines the methods used in the characterization of spinodal structures in metal matrices.
Book Chapter
Isomorphous Alloy Systems
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006224
EISBN: 978-1-62708-163-4
... 2 Bivariant Miscibility Gaps If the solidus and liquidus meet tangentially at some point, a maximum or minimum is produced in the two-phase field, splitting it into two portions as shown in Fig. 4 . It also is possible to have a miscibility gap in a single-phase field; this is shown...
Abstract
The term isomorphous refers to metals that are completely miscible in each other in both the liquid and solid states. This article discusses the construction of simple phase diagrams by using the appropriate points obtained from time-temperature cooling curves. It describes the two methods to determine a phase diagram with equilibrated alloys: the static method and the dynamic method. The article illustrates the construction of phase boundaries according to the Gibbs' phase rule and describes the calculation methods that allow the prediction of the phases present, the chemical compositions of the phases present, and the amounts of phases present. Phase diagrams provide useful information for understanding alloy solidification. The article provides two simple models that can describe the limiting cases of solidification behavior.
Book Chapter
Intermediate Phases
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006229
EISBN: 978-1-62708-163-4
... with a single-phase field, α 0 , at temperature T 0 . When the temperature goes below the critical temperature, a miscibility gap exists where a single-phase homogenous microstructure is no longer stable and a two-phase, α 1 + α 2 , structure forms. The phase boundary on the phase diagram at temperature T...
Abstract
In some phase diagrams, the appearance of several reactions is the result of the presence of intermediate phases. These are phases whose chemical compositions are intermediate between two pure metals, and whose crystalline structures are different from those of the pure metals. This article describes the order-disorder transformation that typically occurs on cooling from a disordered solid solution to an ordered phase. It provides a table that lists selected superlattice structures and alloy phases that order according to each superlattice. The article informs that spinodal decomposition has been particularly useful in the production of permanent magnet materials, because the morphologies favor high magnetic coercivities. It also describes the theory of spinodal decomposition with a simple binary phase diagram.
Book Chapter
Cu (Copper) Ternary Alloy Phase Diagrams
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006240
EISBN: 978-1-62708-163-4
... includes 42 phase diagrams (liquidus projection, solidus projection, isopleths, isothermal section and vertical section). copper ternary system isopleths liquidus projection miscibility gap solidus projection ternary alloy phase diagrams THIS ARTICLE includes systems where copper...
Abstract
This article is a compilation of ternary alloy phase diagrams for which copper (Cu) is the first-named element in the ternary system. The other elements are Fe, Mn, Ni, Pb, S, Sb, Si, Sn, Ti and Zn. The diagrams are presented with element compositions in weight percent. The article includes 42 phase diagrams (liquidus projection, solidus projection, isopleths, isothermal section and vertical section).
Book Chapter
Monotectic Alloy Systems
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006227
EISBN: 978-1-62708-163-4
..., alloys containing between 36 and 87 wt% Pb separate into two liquids on further cooling. The two liquids coexist in the miscibility gap, or dome, that is typical of all alloys that undergo a monotectic reaction. During solidification of a copper-lead alloy containing 20 wt% Pb, the copper-rich α phase...
Abstract
Monotectic alloys can be classified based on the difference between the critical temperature and the monotectic temperature. This article begins with a schematic illustration of monotectic reaction in copper-lead system. It discusses the solidification structures of monotectics and illustrates the monotectic solidification for low-dome alloys. The forming mechanism of the banded structure of copper-lead alloy in upward directional solidification is also described.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005206
EISBN: 978-1-62708-187-0
... of a liquid and a solid phase, Ω L and Ω S , lens-shaped isomorphous ( Fig. 2 ), eutectic ( Fig. 2 ), or pertitectic ( Fig. 2 ) phase diagrams can be obtained. A positive value of Ω φ results in the formation of a miscibility gap (a region of phase separation) at lower temperature. However, since...
Abstract
This article discusses the application of thermodynamic in the form of phase diagrams for visually representing the state of a material and for understanding the solidification of alloys. It presents the derivation of the relationship between the Gibbs energy functions and phase diagrams, which forms the basis for the calculation of phase diagrams (CALPHAD) method. The article also discusses the calculation of phase diagrams and solidification by using the Scheil-Gulliver equation.
Book Chapter
Eutectic Alloy Systems
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006225
EISBN: 978-1-62708-163-4
... phase diagram with a minimum in the liquidus and a miscibility gap in the solid state. Source: Ref 1 Fig. 2 Schematic binary phase diagrams with invariant points. (a) Hypothetical diagram with miscibility gap in the solid that touches the solidus curve at invariant point P ; an actual...
Abstract
This article begins with a schematic illustration of a eutectic system in which the two components of the system have the same crystal structure. Eutectic systems form when alloying additions cause a lowering of the liquidus lines from both melting points of the pure elements. The article describes the aluminum-silicon eutectic system and the lead-tin eutectic system. It discusses eutectic morphologies in terms of lamellar and fibrous eutectics, regular and irregular eutectics, and the interpretation of eutectic microstructures. The article examines the solidification of a binary alloy of exactly eutectic composition. It concludes with a discussion on terminal solid solutions.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003085
EISBN: 978-1-62708-199-3
... the liquid and solid states If the solidus and liquidus meet tangentially at some point, a maximum or minimum is produced in the two-phase field, splitting it into two portions as shown in Fig. 4 . It also is possible to have a gap in miscibility in a single-phase field; this is shown in Fig. 5...
Abstract
Alloy phase diagrams are useful for the development, fabrication, design and control of heat treatment procedures that will produce the required mechanical, physical, and chemical properties of new alloys. They are also useful in solving problems that arise in their performance in commercial applications, thus improving product predictability. This article describes different equilibrium phase diagrams (unary, binary, and ternary) and microstructures, description terms, and general principles of reading alloy phase diagrams. Further, the article discusses plotting schemes; areas in a phase diagram; and the position and shapes of the points, lines, surfaces, and intersections, which are controlled by thermodynamic principles and properties of all phases that comprise the system. It also illustrates the application of the stated principles with suitable phase diagrams.
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001763
EISBN: 978-1-62708-178-8
... at the Curie temperature over a broad range of composition. For those exhibiting spin-glass behavior, there is an increase in intensity below the T c ( Ref 9 , 10 , 18 ). Small-angle x-ray scattering has been used to determine the miscibility gap in binary metallic alloys, such as aluminum-silver...
Abstract
This article presents the experimental and theoretical aspects of small-angle scattering, and discusses specific applications used in the characterization of metals, glasses, polymers, and ceramics. The basic methods of collimating x-rays, the cause of smearing from a line source, desmearing parameters, and the types of scattering curves are illustrated.
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