The Authors

Johannes Preußner is a scientific researcher and Ph.D. student at the Chair of Metals and Alloys at the University of Bayreuth, Germany. His main interests include modelling and simulation in materials science and new high-temperature materials.

Sara Prins is a research metrologist at the National Metrology Institute of South Africa. She is undertaking Ph.D. research at the Pennsylvania State University, U.S.A., where she is working on phase diagram and first-principles calculations.

In his Ph.D. thesis at the University of Bayreuth, Markus Wenderoth developed new precipitation-hardened platinum base alloys for application at high temperatures and experimentally analysed their microstructure, high-temperature strength and oxidation behaviour. He is now working as a production engineer with Siemens Medical Solutions, Vacuum Technology Division.

Dr.-Ing. Rainer Völkl is an academic councillor and senior researcher at the Chair of Metals and Alloys, University of Bayreuth. His main fields of research include alloys of platinum group metals as well as nickel base alloys, testing of mechanical properties at high temperatures and electron microscopy.

Professor Dr.-Ing. Uwe Glatzel is head of the Chair of Metals and Alloys at the University of Bayreuth. His work had a big impact on the development of modern high-temperature alloys, mainly nickel base superalloys. He advises several research groups, including those working on platinum-based superalloys and other alloys for high-temperature applications, laser metallurgy, material analysis and artificial knee joints.

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Building a Thermodynamic Database for Platinum-Based Superalloys: Part III

J. Preußner

Metals and Alloys, Universität Bayreuth, Ludwig-Thoma-Straße 36b, D-95447 Bayreuth, Germany;

S. N. Prins

National Metrology Institute of South Africa, Private Bag X34, Lynwood Ridge 0040, South Africa
and Phases Research Lab, Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, U.S.A.

M. Wenderoth

Siemens AG, Medical Solutions, Vacuum Technology Division, Röntgenstraße 2, D-07407 Rudolstadt, Germany

R. Völkl

Metals and Alloys, Universität Bayreuth, Ludwig-Thoma-Straße 36b, D-95447 Bayreuth, Germany

U. Glatzel

Metals and Alloys, Universität Bayreuth, Ludwig-Thoma-Straße 36b, D-95447 Bayreuth, Germany;

Platinum Metals Review

Article Synopsis

Work is being done at Mintek, the University of Leeds and the University of Bayreuth to build up a platinum-aluminium-chromium-ruthenium (Pt-Al-Cr-Ru) database for the prediction of phase diagrams for further alloy development by obtaining good thermodynamic descriptions of all of the possible phases in the system. Binary descriptions were combined, allowing extrapolation into the ternary systems, and experimental phase equilibrium data were compared with calculated results. Part I of this series of papers (1) addressed the Pt-Al-Ru system, and Part II (2) the Pt-Cr-Ru system. This final paper (Part III) deals with progress towards a platinum-aluminium-chromium-nickel (Pt-Al-Cr-Ni) database at the University of Bayreuth, using thermodynamic calculations from first principles to deal with the problem of sparse data. The Pt-Al-Cr-Ru and Pt-Al-Cr-Ni databases will eventually be merged to give a Pt-Al-Cr-Ni-Ru database.

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