Abstract
A multi-stage hierarchical sieving approach based on a combination of semiempirical and ab initio calculations along with selected experimental studies was used to down-select potential alloy Systems for ultra-high-temperature applications. This approach indicates that the Mo-Ni-Al system has potential for applications at the target temperatures of 1,200–1,300°C. The Mo was selected for its high melting temperature, room temperature toughness, and creep resistance while the NiAl is a reservoir for the Al 2 O 3 passivating scale. Microstructures based on casting and powder processing of the Mo-Ni-Al alloys were studied. Oxidation behavior of the Mo-Ni-Al alloys at 1,100 and 1,200°C in dry air was determined and those alloys with ≤20 at. % Mo were shown to be superior to the T2 (Mo 5 SiB 2 ). Furthermore, the calculations predicted that small amounts of platinum group metals Pd, Ir, and Rh additions would increase the melting temperature without forming detrimental intermetallic phases, which results in improved oxidation stability of the NiAl phase.
Similar content being viewed by others
References
R.C. Reed, The Superalloys: Fundamentals and Applications (Cambridge, U.K.: Cambridge University Press, 2006).
M. Meyer, M. Kramer, and M. Akinc, Adv. Mater., 8 (1996), pp. 85–88.
M.K. Meyer, M.J. Kramer, and M. Akinc, Intermetallics, 4 (1996), pp. 273–281.
M.K. Meyer and M. Akinc, J. Amer. Cer. Soc., 79 (1996), pp. 938–944.
J.R. Nicholls, MRS Bulletin, 28 (2003), pp. 659–670.
A.J. Thom, E. Summers, and M. Akinc, Intermetallics, 10 (2002), pp. 555–570.
J.H. Rose, J. Ferrante, and J.R. Smith, Phys. Rev. Lett., 47 (1981), p.675.
C. Li and R Wu, Chem. of Mater, 14 (2002), pp. 4833–4836.
C. Li, J. Lim Hoe, and P. Wu, J. Phys. and Chem. of Solids, 64 (2003), pp. 201–212.
P.K. Ray, M. Akinc, and M.J. Kramer, J. Alloys and Comp., 489 (2010), pp. 357–361.
J.E. Croll and G.R. Wallwork, Oxidation of Metals, 4 (1972), pp. 121–140.
G. Kresse and J. Furthmüller, Phys. Rev. B, 54 (1996), p. 11169.
G. Kresse and J. Furthmüller, Computational Mater. Sci., 6 (1996), pp. 15–50.
G. Kresse and J. Hafner, Phys. Rev. B, 47 (1993), p.558.
H.J. Monkhorst and J.D. Pack, Phys. Rev. B, 13 (1976), p. 5188.
X. Lu, Y. Cui, and Z. Jin, Metal. and Mater. Trans. A, 30 (1999), pp. 1785–1795.
B.H. Toby, J. Appl. Cryst., 34 (2001), pp. 210–213.
G.R. Wallwork, Reports on Progress in Physics, 39 (1976), pp. 401–485.
X. Zhao, I.P. Shapiro, and P. Xiao, Surface and Coatings Technology, 202 (2008), pp. 2905–2916.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Ray, P.K., Brammer, T., Ye, Y.Y. et al. A multi-stage hierarchical approach to alloy design. JOM 62, 25–29 (2010). https://doi.org/10.1007/s11837-010-0151-2
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11837-010-0151-2