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Effect of Pre-Oxidation on The Oxidation Behavior of Ti-2Al-2.5Zr Alloy at 300°C in An Alkaline Steam

Published online by Cambridge University Press:  17 March 2011

X. T. Zu ,
Y. L. Li ,
G.T. Zeng ,
X. Q. Huang ,
Z.G. Wang ,
L. B. Lin  and
X. D. Feng
X. T. Zu
Affiliation:
Key Laboratory for Radiation Physics and Technology of Ministry o f Education, Department of Physics/Metal Materials, Sichuan University, Chengdu, 610064, P.R. China Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
Y. L. Li
Affiliation:
National Key Laboratory for Nuclear Fuel and Material, Nuclear Power Institute of China, Chengdu, 610041, P. R. China
G.T. Zeng
Affiliation:
Key Laboratory for Radiation Physics and Technology of Ministry o f Education, Department of Physics/Metal Materials, Sichuan University, Chengdu, 610064, P.R. China
X. Q. Huang
Affiliation:
National Key Laboratory for Nuclear Fuel and Material, Nuclear Power Institute of China, Chengdu, 610041, P. R. China
Z.G. Wang
Affiliation:
Key Laboratory for Radiation Physics and Technology of Ministry o f Education, Department of Physics/Metal Materials, Sichuan University, Chengdu, 610064, P.R. China
L. B. Lin
Affiliation:
Key Laboratory for Radiation Physics and Technology of Ministry o f Education, Department of Physics/Metal Materials, Sichuan University, Chengdu, 610064, P.R. China
X. D. Feng
Affiliation:
Key Laboratory for Radiation Physics and Technology of Ministry o f Education, Department of Physics/Metal Materials, Sichuan University, Chengdu, 610064, P.R. China
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Abstract

The long-term oxidation behavior on a Ti-2Al-2.5Zr alloy with and without pre-oxidation oxidized at 300 in an alkaline steam for about 13000h were studied. Some of the samples were subjected to 400°C deionized water steam at a pressure of 10MPa for 72 hours for pre-oxidation. A comparison study has been carried out between the pre-oxidized and without pre-oxidized Ti-2Al-2.5Zr to determine the influence of pre-oxidation upon the properties of oxidation resistance. The result analysis showed that the oxide scales on the Ti-2Al-2.5Zr alloy consisted of Al2TiO5, TiO2, Ti3O5, Ti2O3, Al2O3 and TiO. The oxidation kinetics showed that the weight gains of the pre-oxidized samples were much less than that of the without pre-oxidized samples. The AES results showed that the whole thickness of the pre-oxidized sample thinner than that of the without pre-oxidized one, in contrast the pattern for the stable oxide scale was reversed, i.e. the pre-oxidized sample was much thicker. It is thought that pre-oxidation is an effective method to enhance the oxidation resistance of Ti-2Al-2.5Zr.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P8.9
Copyright
Copyright © Materials Research Society 2002

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