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Oxidation Behavior of Ni3Al-8Cr-0.1B Alloy Containing Zr Addition*

Published online by Cambridge University Press:  26 February 2011

Guo Jiangting ,
Sun Chao ,
Li Hui  and
Guan Hengrong
Guo Jiangting
Affiliation:
Institute of Metal Research, Academia Sinica, 2–6 Wenhua Road, Shenyang, P. R. China
Sun Chao
Affiliation:
Institute of Metal Research, Academia Sinica, 2–6 Wenhua Road, Shenyang, P. R. China
Li Hui
Affiliation:
Institute of Metal Research, Academia Sinica, 2–6 Wenhua Road, Shenyang, P. R. China
Guan Hengrong
Affiliation:
Institute of Metal Research, Academia Sinica, 2–6 Wenhua Road, Shenyang, P. R. China
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Abstract

The isothermal oxidation behavior of Ni3A1 + 8Cr + 0.1B alloy containing zirconium addition was studied over a temperature range 850 to 1150°C and for periods up to 100 h. The results show that isothermal oxidation kinetics of the alloys at various temperatures obey a parabolic law. The addition of zirconium to Ni3A1-8Cr-0.1B alloy improves oxidation resistance at 850 to 950°C. However, the additive results in a considerable weight gain at 1050 to 1150°C. The structure of scale and phase transformation of the surface zone beneath the scale have been investigated. The addition of zirconium leads to the formation of adherent scale at all temperatures, since the internal oxides, like “tree roots” between the oxide scale and the substrate, are developed during oxidation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 591
Copyright
Copyright © Materials Research Society 1989

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Footnotes

*

This work was partially supported by Corrosion Science Laboratory, Shenyang, China.

References

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