Effects of yttrium on the oxidation behaviour of Iron-Chromium-Aluminium Alloys

✍ Scribed by Dr. Ing. J. Klöwer; Dr.-Ing. J.-G. Li

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: German
• Weight: 869 KB
• Volume: 47
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.19960471003

✦ Synopsis

Abstract

The effects of yttrium additions on the oxidation behaviour of Fe‐20Cr‐5Al(wt%) alloys have been investigated in oxidation tests and cyclic heating‐element tests at temperatures ranging from 1100 to 1400°C in air. Experimental results showed that the oxidation resistance of the alloys depends sensitively on the yttrium concentration. It was found that yttrium additions of about 0.045 wt% are sufficient to prevent the oxide scale from spalling. When the yttrium content is increased to more than 0.08 wt%, on the other hand, substantial internal oxidation of the alloys takes place, resulting in rapid wastage of the materials.