Publication details

Phase Equilibria in the Ni-Al-W System

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Year of publication 2004
Type Article in Proceedings
Conference TOFA 2004, Book of Abstracts, Program
MU Faculty or unit

Faculty of Science

Field Physical chemistry and theoretical chemistry
Keywords ni-based superalloys; thermodynamics; phase diagram
Description Multicomponent Ni-base alloys exhibit good mechanical properties even at elevated temperatures and they are widely used for industrial production of exertion-resistive parts of engines. These properties are mainly determined by the coexistence of a disordered gamma matrix with a face centred cubic lattice and cuboidal domains of its ordered gamma' structure. Therefore it is useful to study phase equilibria in Ni-base systems, namely in the regions involving both mentioned phases. One from the conclusions of our recent work on Ni-Al-Cr-W system was a necessity of modification of selected thermodynamic parameters for the ternary Ni-Al-W subsystem in order to achieve a better agreement of our experimental observations with theoretical modelling. This work involves, therefore, new measurements of microstructure on selected samples of the Ni-Al-W system at various temperatures and the comparison of the results with existing literature data confirming our conclusions on higher order system investigated before.
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