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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
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.
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- Copyright © Materials Research Society 1995