Cyclic Oxidation Behaviour of a Ni-Based Alloy at 900°C

Xu Dong Lu; Ce An Guo; Jie Wang; Shu Wu Ma

doi:10.4028/www.scientific.net/AMM.80-81.51

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 80-81Cyclic Oxidation Behaviour of a Ni-Based Alloy at...

Cyclic Oxidation Behaviour of a Ni-Based Alloy at 900°C

Abstract:

The cyclic oxidation behaviour of Ni 5.5Al 2.6Ti 4.8Co 3.9Mo 5.0W 11.0Cr superalloy at 900 °C in air has been investigated by means of measuring the kinetics curves of the oxidation and analysis method of XRD and SEM/EDAX. The results show that the mass gain rapidly increases in the initial stage, and the weight loss and mass gain occurs alternately during the cyclic oxidation. An obvious oxidation and internal oxidation occurs during cyclic oxidation. Ti in the alloy oxidized, diffusing through the Al2O3 and Cr2O3 scales to form faceted TiO2 particle on the surface of the alloy. Al2O3 formed discontinuousness inner oxides in the alloy.

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Periodical:

Applied Mechanics and Materials (Volumes 80-81)

Pages:

51-54

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.80-81.51

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Online since:

July 2011

Authors:

Xu Dong Lu, Ce An Guo, Jie Wang, Shu Wu Ma

Keywords:

High Temperature Oxidation, Internal Oxidation, Ni Based Superalloy, Oxidizing Kinetics

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