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Reaction of beta-phase Ni–Al alloys with CrB2

Published online by Cambridge University Press:  31 January 2011

Ajay K. Misra
Ajay K. Misra
Affiliation:
Sverdrup Technology, Inc., NASA Lewis Research Center Group, Cleveland, Ohio 44135
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Abstract

Reaction of Ni–Al alloys within the β-NiAl phase with CrB2 was studied at 1473 K as a function of Al concentration in the alloy. Reaction of 49–50 at. % Al alloys with CrB2 occurred by interdiffusion of Ni into CrB2 and Cr into the alloy without forming a new product phase. On the other hand, a new product phase, rich in Ni and B, formed by the reaction of alloys having Al concentrations 48 at. % or lower with CrB2. The reaction product was observed both at the CrB2/alloy interface and along the alloy grain boundaries.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 8 , August 1991 , pp. 1664 - 1672
Copyright
Copyright © Materials Research Society 1991

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