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Mauer, 2019

Titel Entwicklung von thermischen Spritzprozessen für fortschrittliche Schutz- und Funktionsschichten
Autor/Autorin Mauer, Georg
Verleger Jülich: Forschungszentrum Jülich GmbH Zentralbibliothek
Erscheinungsjahr 2019
Gesamttitel Entwicklung von thermischen Spritzprozessen für fortschrittliche Schutz- und Funktionsschichten Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment Band / Volume 455
Hochschulschrift Habilitationsschrift, Univ. Dortmund, 2018
ISBN 978-3-95806-388-4
Sprache Deutsch (ger)
Schlagwörter
Bezugsquelle Vollständig frei verfügbar über das Publikationsportal des Forschungszentrums Jülich (JuSER)


Abstract

This postdoctoral thesis draws on manuscripts published as first or co-author in peer-reviewed scientific journals and demonstrates their common theme. Based on examples of advanced protective and functional coatings, the specific, systematic development of thermal spray processes is described. This refers to the design of processes as well as to the development of new processes. Special importance is attached to the application of process diagnostics. The work was performed at Forschungszentrum Jülich, Institute of Energy and Climate Re-search, IEK-1: Materials Synthesis and Processing. First of all, the thermal spray processes avail-able at the institute which were applied in this work are briefly described. To achieve a better understanding of thermal spraying, the use of process diagnostics is indispensable. The purpose of the diagnostics described in the thesis is the characterization of the hot gas jet, the determination of particle properties, and the characterization of the compounds of coatings and substrates. The first examples of applications given in this thesis are thermal barrier coatings for modern, highly loaded gas turbines to improve their lifetime or efficiency. Further examples are ceramic gas separation membranes for advanced fossil power plants as well as for other energy-intensive processes in the steel, glass, and cement industries. Moreover, different functional coatings for solid oxide fuel cells, photo-catalytically active coatings, and coatings for wear protection then follow. The given examples feature some baselines which suggest that the systematic development of thermal spray processes should be regarded as a three-step approach comprising method → model → concept. Hence, the relations between process variables and coating properties which are found by the methods described can lead to the development of physical models describing the functional interdependencies between process parameters, on the one hand, and coating results, on the other hand. From this, concepts can be derived to realize particular coating properties. In performing this research work, the need for systematic development approaches became clear, especially in the context of materials exhibiting particular processing difficulties such as decomposition and inhomogeneous evaporation. In cases where solutions were found, the application of process diagnostics always played an important role.


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