Effect of Yttrium Addition on High Temperature Oxidation Resistance of Co-10Cr-5Al Alloys

Abstract:

The oxidation behavior of Co-10Cr-5Al-0.3Y alloy in 1 atm of pure O₂ at 700°C was investigated. The addition of 0.3 at.%Y significantly increased the oxidation rate of the alloy and changed the oxidation behavior from the approximate parabolic rate law to linear rate law. The scale grown on the surface at 700°C was porous with many small voids and cracks, and was composed of an outer CoO layer and an inner complex layer rich in Al₂O₃ and Cr₂O₃ which were intermingled with yttric oxide and spinel Co(Cr, Al)₂O₄.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 606-610
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.606
• Online since: December 2011
• Authors: Huai Shu Zhang, Hong Hua Zhang, Jun Huai Xiang, Shan Wang, Di Wu
• Keywords: Co-10Cr-5Al, High-Temperature, Oxidation, Reactive-Element Effect

References

[1] G.W. Goward: Surf. Coat. Technol Vol. 108-109 (1998), p.73.

[2] J.W. Lee, Y.C. Kuo: Surf. Coat. Technol Vol. 200 (2005), p.1225.

[3] K. Zhang, Q.M. Wang, C. Sun and F.H. Wang: Corros. Sci. Vol. 50 (2008), p.1707.

[4] J.H. Xiang, Y. Niu and F. Gesmundo: Corros. Sci. Vol. 47 (2005), p.1493.

[5] R. Cueff, H. Buscail, E. Caudron, C. Issartel and F. Riffard: Corros. Sci. Vol. 45 (2003), p.1815.

[6] P. Castello, F.H. Stott and F. Gesmundo: Corros. Sci. Vol. 41 (1999), p.901.

[7] S.K. Samanta, S.K. Mitra and T.K. Pal: Mater. Sci. Eng. A Vol. 430 (2006), p.242.

[8] R. Thanneeru, S. Patil, S. Deshpande and S. Seal: Acta Materialia Vol. 55 (2007), p.3457.

[9] J. Stringer: Mater. Sci. Eng. A Vol. 120 (1989), p.129.

[10] B.A. Pint: Oxid. Met. Vol. 45 (1996), p.1.

[11] G.R. Wallwork, A. Z. Hed: Oxid. Met. Vol. 3 (1971), p.213.

[12] W. Wang, P. Yu, F.H. Wang and S.L. Zhu: Surf. Coat. Technol. Vol. 201 (2007), p.7425.