Theoretical Prediction of Ternary Site Occupancies in ZrCr2 and NbCr2 Laves Phases

Abstract:

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Site occupancies of ternary additions (Ti, V, and W) in the C15 ZrCr2 and NbCr2 Laves phases were predicted theoretically by first-principles calculations based on density functional theory. The results suggest that Ti preferentially occupies the Zr and Nb sites in ZrCr2 and NbCr2, respectively. V and W substitute the Cr sites in both ZrCr2 and NbCr2. The calculations of heats of formation also show that the occupancy of W on the Cr sites and of Ti on the Zr sites stabilize ZrCr2. For NbCr2, the occupancy of V on the Cr sites and of Ti on the Nb sites increases the phase stability.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

1451-1454

DOI:

10.4028/www.scientific.net/MSF.546-549.1451

Citation:

Q. Yao et al., "Theoretical Prediction of Ternary Site Occupancies in ZrCr2 and NbCr2 Laves Phases", Materials Science Forum, Vols. 546-549, pp. 1451-1454, 2007

Online since:

May 2007

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Price:

$35.00

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