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Thin-Film Synthesis and Cyclic Oxidation Behavior of B2-RuAl

Published online by Cambridge University Press:  01 February 2011

Karsten Woll ,
Rama Chinnam  and
Frank Mücklich
Karsten Woll
Affiliation:
[email protected], Saarland University, Materials Science and Engineering, Functional Materials, Saarbrücken, Germany
Rama Chinnam
Affiliation:
[email protected], Saarland University, Materials Science and Engineering, Functional Materials, Saarbrücken, Germany
Frank Mücklich
Affiliation:
[email protected], Saarland University, Materials Science and Engineering, Functional Materials, Saarbrücken, Germany
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Abstract

B2-RuAl as a potential intermetallic for thin-film applications at high temperatures is studied with respect to thin-film synthesis and cyclic oxidation behaviour. Using the multilayer approach, single phase RuAl thin films were fabricated. The phase sequence from the elements Ru and Al goes through RuAl6 to the final product RuAl. To understand the reaction mechanism calorimetric as well as kinetic experiments were performed. The cyclic oxidation behavior is characterized at 1200 °C up to 47 h. The morphology of the grown alumina shows no cracks or regions of spallation which indicates the good cyclic oxidation behavior. Compressive stresses in the oxidation scale of about 1.2 GPa at maximum were determined.

Keywords

thin filmnucleation & growthoxidation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U06-10
Copyright
Copyright © Materials Research Society 2009

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References

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