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Phase equilibrium between bcc solid solution matrix and B2 aluminides in Nb-based alloy

Published online by Cambridge University Press:  13 February 2015

Takuya Yamanouchi  and
Seiji Miura
Takuya Yamanouchi*
Affiliation:
Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University; Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Hokkaido, Japan
Seiji Miura
Affiliation:
Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University; Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Hokkaido, Japan
*
*Graduate student, Graduate School of Engineering, Hokkaido University
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Abstract

B2 aluminides have a role of Al reservoir for Al2O3 surface and it is expected to increase oxidation resistance of (Nb,Mo)-bccss substrate. For the accumulation of the basic information to design the alloy composed of B2 coating on bccss matrix, bccss - B2 two-phase field was investigated in the Nb-Mo-Ni-Pd-Al system at 1273 K. It is found that Pd-rich B2-(Ni,Pd)Al phase is in equilibrium with Nb-rich bccss phase, while without Pd, the composition range of bccss coexisting with B2-NiAl phase is limited to be low Nb.

Keywords

coatingNbphase equilibria

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Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1760: Symposium YY – Advanced Structural and Functional Intermetallic-Based Alloys , 2015 , mrsf14-1760-yy05-38
Copyright
Copyright © Materials Research Society 2015 

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References

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