This title appears in the Scientific Report :
2004
Effect of combined Yttrium and Zirconium Additions on Protective Alumina Scale Formation on High Purity FeCrAl Alloys during Oxidation in the Temperature range of 1200 to 1300°C
Effect of combined Yttrium and Zirconium Additions on Protective Alumina Scale Formation on High Purity FeCrAl Alloys during Oxidation in the Temperature range of 1200 to 1300°C
The oxidation behaviour of high purity FeCrAl alloys containing minor additions (in the 100 ppm range) of Y and a combination of Y+Zr has been studied at temperatures between 1200 and 1300degreesC in Ar/O-2. Higher oxidation rates of the Y+Zr-doped alloy compared to those of the Y-doped alloy were f...
Saved in:
Personal Name(s): | Naumenko, D. |
---|---|
Kochubey, V. / Le-Coze, J. / Wessel, E. / Singheiser, L. / Quadakkers, W. J. | |
Contributing Institute: |
Werkstoffstruktur und Eigenschaften; IWV-2 |
Published in: | Materials science forum, 461-464 (2004) S. 489 - 496 |
Imprint: |
Uetikon
Trans Tech Publ.
2004
|
Physical Description: |
489 - 496 |
Document Type: |
Journal Article |
Research Program: |
Werkstoffsysteme für Kraftwerke |
Series Title: |
Materials Science Forum
461-464 |
Subject (ZB): | |
Publikationsportal JuSER |
The oxidation behaviour of high purity FeCrAl alloys containing minor additions (in the 100 ppm range) of Y and a combination of Y+Zr has been studied at temperatures between 1200 and 1300degreesC in Ar/O-2. Higher oxidation rates of the Y+Zr-doped alloy compared to those of the Y-doped alloy were found. Yttrium incorporation into the alumina scale followed by formation of Y/Al-mixed oxide compounds was observed in case of the Y-doped alloy. The Y incorporation into the scale tended to be suppressed in the Y+Zr-doped alloy. Instead, substantial Zr incorporation occurred which resulted in numerous zirconia inclusions and a rather high degree of microporosity. This leads to an enhanced contribution of molecular oxygen transport to the overall scale growth process resulting in an enhanced oxidation rate. |