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A Study of the Processing and Compositional Variables on the Microstructural Development and Oxidation Characteristics of Rapidly Solidified NiAlCo Alloys

Published online by Cambridge University Press:  01 January 1992

M.L. Stewart  and
P.B. Aswath
M.L. Stewart
Affiliation:
University of Texas at Arlington, Department of Mechanical and Aerospace Engineering, Materials Science and Engineering Program, Arlington, Tx.
P.B. Aswath
Affiliation:
University of Texas at Arlington, Department of Mechanical and Aerospace Engineering, Materials Science and Engineering Program, Arlington, Tx.
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Abstract

Oxidation tests were performed isothermally at 1000° C on chill block melt spun metallic ribbons with alloy compositions consisting of Ni(46-50 at%), Al(31-33 at%), Co( 17-20 at%) and Hf(0-1 at%). The oxidation rates were calculated and the microstructure was examined. Results indicated the difference in microstructural and oxidation characteristics could largely be attributed to the differences in the superheat of the melt. There was no indication that hafnium retarded grain growth. The oxidation behavior of two of the ribbons exhibited a logarithmic rate law.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1007
Copyright
Copyright © Materials Research Society 1995

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References

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