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Effects of Yttrium on Cyclic Oxidation Resistance of Co-10Cr-5Si Alloy at 700 °C

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Abstract:

The cyclic oxidation behavior of Co-10Cr-5Si alloys with and without Y in atmosphere at 700 °C was investigated. The addition of 0.3 at.% Y decreased the average parabolic rate constant from 4.39×10-10 g2cm-2s-1 to 3.42×10-10 g2cm-2s-1. The surface components with and without Y were both composed of an outer CoO and inner protective SiO2. There were more SiO2 formed when Y doped into the alloy. The addition of 0.3 at.% Y improved the cyclic oxidation resistance of the Co-10Cr-5Al alloy.

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Periodical:

Applied Mechanics and Materials (Volume 525)

Pages:

154-157

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.525.154

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Online since:

February 2014

Authors:

Jun Huai Xiang, Xian Chao Xu, Ling Yun Bai*, Yun Xiang Zheng, Huai Shu Zhang

Keywords:

Co-10Cr-5Si, Cyclic Oxidation, High-Temperature, RE Effect

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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