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Metastable Hexagonal Modifications of the NbCr2 Laves Phase as Function of Cooling Rate

Published online by Cambridge University Press:  01 February 2011

Jochen Aufrecht ,
Andreas Leineweber  and
Eric Jan Mittemeijer
Jochen Aufrecht
Affiliation:
j.aufrecht@mf.mpg.de, Max Planck Institute for Metals Research, Stuttgart, Germany
Andreas Leineweber
Affiliation:
a.leineweber@mf.mpg.de, Max Planck Institute for Metals Research, Stuttgart, Germany
Eric Jan Mittemeijer
Affiliation:
e.j.mittemeijer@mf.mpg.de, Max Planck Institute for Metals Research, Stuttgart, Germany
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Abstract

In as-cast ingots produced by arc-melting, several metastable polytypic modifications of NbCr2 were found additional to the cubic C15 phase stable at room temperature: C14, C36 and 6H-type structures, often highly faulted and/or intergrown. Strikingly, these phases had formed at locations of the specimen which had experienced a relatively low cooling rate, whereas the C15 phase was formed preferentially in regions which had experienced the highest cooling rates.

Keywords

NbCrphase transformation
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-U08-07
Copyright
Copyright © Materials Research Society 2009

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References

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