Gap Miscibility
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation
The phase field model based on the nonlinear Cahn-Hilliard equation was applied to analyze the spinodal decomposition process in Al-Zn and Al-Zn-Cu alloys. Partial differential equations were solved using the explicit finite difference method for the Al- 20, and 35 at. % Zn alloys aged at temperatures between 25 and 100 °C for times from 10 s to 2000 s and
Mat. Res.. Publicado em: 20/03/2017
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2. Numerical analysis of phase decomposition in A-B binary alloys using Cahn-Hilliard equations
The analysis of phase decomposition was carried out using the nonlinear and linear Cahn-Hilliard equations in a hypothetical A-B alloy system with a miscibility gap. These equations were solved by the explicit finite difference method assuming a regular solution model. The supersaturated solid solution and decomposed phases were considered to have an fcc str
Mat. Res.. Publicado em: 28/05/2013
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3. Calculos de estabilidade e divisão de fases por meio de redes neurais artificiais / Phase splitting and stability calculations by means of artificial neural networks
Process simulation is a basic component of different Process Engineering activities such as On-line Optimization, Model Predictive Control, Identification, etc. The calculation of Phase Equilibrium appears as a fundamental task in any simulation of a separation process. However, the high computational time due to the iterative nature of this calculation make
Publicado em: 2006
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4. Propriedades estruturais, eletrônicas e termodinâmicas dos nitretos do grupo-III e de suas ligas / Structural, electronic and thermodynamic properties of group-III nitrides and their alloys.
Neste trabalho foram efetuados estudos importantes e pioneiros sobre as propriedades estruturais, eletrônicas e termodinâmicas dos nitretos e de suas ligas, através de dois métodos de primeiros princípios distintos, o FLAPW (\"Full-potential Linear Augmented Plane Wave\") e o pseudopotencial combinado com a aproximação quasequímica generalizada. Na p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/05/2001
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5. Caracterização termodinamica de sistemas ternarios para escolha de processos de separação
The objective of this work is to develop a methodology for studing the vapor-(liquid)-liquid phase behaviour of ternary systems and for rapidly determining the partial miscibility presence by using the commercial simulator PROII. The methodology uses flash simulation to do liquid-(liquid)-vapor equilibrium calculations simulation results are used to generate
Publicado em: 1995
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6. Estudo de oxidação em ligas do sistema Fe-ND
The oxidation study of Fe-Nd system was developed from Fe-Nd binary alloys, and Fe-Nd-O ternary alloys. Optical Metallography, AC Termomagnetic Analysis, Eletronic Microprobe and Coercivity Measurements were used for alloys characterization. The binary alloys were first stabilized and then submitted to a heat treatment under oxygen atmosphere. Those alloys p
Publicado em: 1992
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7. Lateral phase separation in interfacial films of pulmonary surfactant.
To determine if lateral phase separation occurs in films of pulmonary surfactant, we used epifluorescence microscopy and Brewster angle microscopy (BAM) to study spread films of calf lung surfactant extract (CLSE). Both microscopic methods demonstrated that compression produced domains of liquid-condensed lipids surrounded by a liquid-expanded film. The temp