Skip to main content
    • Aa
    • Aa

Effect of rare earth element on the oxidation behavior of novel γ/γ′-strengthened Co–9Al–10W alloys

  • Qiong Wang (a1), Qiang Yao (a1), Jin-Zhu Song (a1), Yan Wang (a1), Yu-Hong Zhu (a1), Tong Lu (a1) and Bao-Jun Han (a2)...

A series of oxidation experiments were carried out on these novel γ/γ′-strengthened cobalt-based alloys of the systems Co–9Al–10W and Co–9Al–10W–0.02X (X = La, Ce, Dy, Y) at 900 °C. The appropriate amounts’ addition of rare earth elements leads to improved oxidation properties at 900 °C, especially La elements show the best oxidation resistance (129.008 mg/cm2). However, the base Co–9Al–10W alloy shows the worst oxidation performance (151.544 mg/cm2). Multilayer oxide layers formed during the oxidation process, the outer were mainly CoO and Co3O4 oxides, and the middle layer contained complex oxides (containing Co, Al, and W). The inner layer consists of little discontinuous oxides, included few Al2O3 oxides. There existed a different crack width and the base alloy had the widest crack. Moreover, there exists a phase transformation (γ/γ′ to γ/Co3W) at the interface between oxide film and substrate.

Corresponding author
a) Address all correspondence to this author. e-mail:
Hide All

Contributing Editor: Mathias Göken

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

T.M. Pollock and S. Tin : Nickel-based superalloys for advanced turbine engines: Chemistry, microstructure and properties. J. Propul. Power 22, 361 (2012).

R.C. Reed : The Superalloys: Fundamentals and Applications (Cambridge University Press, Cambridge, 2006).

J.J. Ruan , C.P. Wang , C.C. Zhao , S.Y. Yang , T. Yang , and X.J. Liu : Experimental investigation of phase equilibria and microstructure in the Co–Ti–V ternary system. Intermetallics 49, 121 (2014).

J. Sato , T. Omori , K. Oikawa , I. Ohnuma , R. Kainuma , and K. Ishida : Cobalt-base high temperature alloys. Science 312, 90 (2006).

L. Huang , X.F. Sun , H.R. Guan , and Z.Q. Hu : Oxidation behavior of single crystal Ni-based superalloy in air. Oxid. Met. 65, 207 (2006).

L. Huang , X.F. Sun , H.R. Guan , and Z.Q. Hu : Oxidation behavior of the single-crystal Ni-base superalloy DD32 in air at 900, 1000, and 1100 °C. Oxid. Met. 65, 391 (2006).

C.T. Liu , J. Ma , and X.F. Sun : Oxidation behavior of a single-crystal Ni-base superalloy between 900 and 1000 °C in air. J. Alloys Compd. 491, 522 (2010).

L. Klein , A. Bauer , S. Neumeier , M. Göken , and S. Virtanen : High temperature oxidation of γ/γ′-strengthened Co-base superalloys. Corros. Sci. 53, 2027 (2011).

L. Klein , M.S. Killian , and S. Virtanen : The effect of nickel and silicon addition on some oxidation properties of novel Co-based high temperature alloys. Corros. Sci. 69, 43 (2013).

L. Klein , Y. Shen , M.S. Killian , and S. Virtanen : Effect of B and Cr on the high temperature oxidation behavior of novel γ/γ′-strengthened Co-base superalloys. Corros. Sci. 53, 2713 (2011).

L. Klein , and S. Virtanen : Electrochemical characterisation of novel γ/γ′-strengthened Co-base superalloys. Electrochim. Acta 76, 275 (2012).

L. Klein and S. Virtanen : Corrosion properties of novel γ′–strengthened Co-base superalloys. Corros. Sci. 66, 233 (2013).

D. Coutsouradis , A. Davin , and M. Lamberigts : Cobalt-based superalloys for applications in gas turbines. Mater. Sci. Eng. 88, 11 (1987).

M.G. Hebsur and R.V. Miner : High temperature isothermal and cyclic oxidation behavior of a single crystal Ni base superalloy. J. Mater. Energy Syst. 8, 363 (1987).

B. Wang , J. Gong , A.Y. Wang , C. Sun , R.F. Huang , and L.S. Wen : Oxidation behavior of NiCrAlY coatings on Ni-based superalloy. Surf. Coat. Technol. 149, 70 (2002).

F.A. Khalid , N. Hussain , and K.A. Shahid : Microstructure and morphology of high temperature oxidation in superalloys. Mater. Sci. Eng., A 265, 87 (1999).

R. Kannan and M.S. Seehra : Percolation effects and magnetic properties of the randomly diluted fcc system CopMgp1-pO. Phys. Rev. B: Condens. Matter Mater. Phys. 35, 6847 (1987).

X. Liu and C.T. Prewitt : High-temperature X-ray diffraction study of Co3O4: Transition from normal to disordered spinel. Phys. Chem. Miner. 17, 168 (1990).

S.C. Petitto , E.M. Marsh , G.A. Carson , and M.A. Langell : Cobalt oxide surface chemistry: The interaction of CoO(1 0 0), Co3O4(1 1 0) and Co3O4(1 1 1) with oxygen and water. J. Mol. Catal. A: Chem. 281, 49 (2008).

J.L. Smialek : A deterministic interfacial cyclic oxidation spalling model. Acta Mater. 51, 469 (2003).

D.J. Young : High Temperature Oxidation and Corrosion of Metals, 1st ed. (Elsevier Science, Oxford, 2008).

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 4
Total number of PDF views: 31 *
Loading metrics...

Abstract views

Total abstract views: 150 *
Loading metrics...

* Views captured on Cambridge Core between 2nd February 2017 - 24th September 2017. This data will be updated every 24 hours.