This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1002/maco.201005851 in citations.
Effect of Atmosphere Composition on the Oxidation Behaviour of MCrAlY Coatings
Effect of Atmosphere Composition on the Oxidation Behaviour of MCrAlY Coatings
In the present work the effect of atmosphere composition on the growth rate and adherence of the alumina scales was studied using free-standing MCrAlY-coatings and TBC-specimens with MCrAlY-bondcoats. The exposures comprised isothermal and cyclic exposures in laboratory air and Ar-H-2-H2O at 1100 de...
Saved in:
Personal Name(s): | Song, P. |
---|---|
Subanovic, M. / Toscano, J. / Naumenko, D. / Quadakkers, W.J. | |
Contributing Institute: |
Werkstoffstruktur und -eigenschaften; IEK-2 |
Published in: | Materials and corrosion, 62 (2011) S. 699 - 705 |
Imprint: |
Weinheim [u.a.]
Wiley-VCH
2011
|
Physical Description: |
699 - 705 |
DOI: |
10.1002/maco.201005851 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Materials and Corrosion
62 |
Subject (ZB): | |
Publikationsportal JuSER |
In the present work the effect of atmosphere composition on the growth rate and adherence of the alumina scales was studied using free-standing MCrAlY-coatings and TBC-specimens with MCrAlY-bondcoats. The exposures comprised isothermal and cyclic exposures in laboratory air and Ar-H-2-H2O at 1100 degrees C. It is shown that minor Zr-addition to the bondcoat results in enhanced scale growth and internal oxidation. This effect is independent of the atmosphere composition. As a consequence of the rapid oxide formation the times to TBC failure on the Zr-containing bondcoat in both atmospheres were much shorter compared to those with Zr-free bondcoat. In the latter case the formation of a thin compact alumina TGO was slower in H-2/H2O than in air resulting in significantly longer TBC-lifetime in the former atmosphere. |