Tecnologia em Metalurgia, Materiais e Mineração
Tecnologia em Metalurgia, Materiais e Mineração
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Kattner, Ursula R.

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Successful design of materials and manufacturing processes requires the availability of reliable materials data. Commercial alloys usually contain a large number of elements, and the needed data for the design of new materials and processes are rarely available. The CALPHAD (CALculation of PHAse Diagrams) method enables the development of thermodynamic and property databases, that in conjunction with extrapolation methods of the descriptions of binary and ternary systems to higher-order systems, allow the calculation of data for higher-order systems. The results obtained from CALPHAD calculations have been shown to be invaluable in the design of new materials. This review presents an overview of the CALPHAD method, software tools and databases and gives examples of its application.


CALPHAD, Databases, Diffusion, Phase equilibria, Phase-based properties, Thermodynamics.


O projeto bem sucedido de materiais e processos de fabricação exige a disponibilidade de dados confiáveis sobre os materiais. Ligas comerciais geralmente contêm um grande número de elementos, e os dados necessários para a concepção de novos materiais e processos raramente estão disponíveis. O método CALPHAD (CALculation of PHAse Diagrams) permite o desenvolvimento de bases de dados termodinâmicos e de propriedades que, em conjunto com métodos de extrapolação das descrições de sistemas binários e ternários para os sistemas de ordem superior, permite o cálculo de dados para sistemas de mais alta ordem. Os resultados obtidos a partir de cálculos CALPHAD tem se mostrado extremamente valiosos para a concepção de novos materiais. Esta revisão apresenta uma visão geral do método CALPHAD, ferramentas de software e bancos de dados e dá exemplos de sua aplicação.


CALPHAD, Bases de dados, Difusão, Equilíbrio de fases, Propriedades baseadas em fase, Termodinâmica.


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