Phase Equilibria in the Ni-Al-W System

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Authors

BURŠÍK Jiří BROŽ Pavel PICHA Radim

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

Faculty of Science

Citation
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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