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Phonon densities of states of face-centered-cubic Ni-Fe alloys

Lucas, M. S. and Mauger, L. and Muñoz, J. A. and Halevy, I. and Horwath, J. and Semiatin, S. L. and Leontsev, S. O. and Stone, M. B. and Abernathy, D. L. and Xiao, Yuming and Chow, Paul and Fultz, B. (2013) Phonon densities of states of face-centered-cubic Ni-Fe alloys. Journal of Applied Physics, 113 (17). Art. No. 17A308. ISSN 0021-8979.

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Inelastic neutron scattering and nuclear resonant inelastic x-ray scattering were used to determine the phonon densities of states of face-centered-cubic Ni-Fe alloys. Increasing Fe concentration results in an average softening of the phonon modes. Chemical ordering of the Ni_(0.72)Fe_(0.28) alloy results in a reduction of the partial vibrational entropy of the Fe atoms but does not significantly change the partial vibrational entropy of the Ni atoms. Changes in the phonon densities of states with composition and chemical ordering are discussed and analyzed with a cluster expansion method.

Item Type:Article
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URLURL TypeDescription
Stone, M. B.0000-0001-7884-9715
Abernathy, D. L.0000-0002-3533-003X
Fultz, B.0000-0002-6364-8782
Additional Information:© 2013 American Institute of Physics. Received 24 October 2012; accepted 3 December 2012; published online 8 March 2013. A portion of this research at ORNL’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. This work was supported by the Department of Energy through the Basic Energy Sciences Grant No. DE-FG02- 03ER46055 and BES-MS, W-31-109-ENG-38. Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. Use of the HPCAT facility was supported by DOE-BES, DOE-NNSA (CDAC), NSF, DOD TACOM, and the W.M. Keck Foundation. Use of the APS was supported by DOE-BES, under Contract No. DE-AC02-06CH11357. This work benefitted from DANSE software developed under NSF Grant No. DMR-0520547.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-03ER46055
Department of Energy (DOE)W-31-109-ENG-38
Department of Energy (DOE)DE-AC02-06CH11357
Subject Keywords:entropy; iron alloys; neutron diffraction; nickel alloys; phonons; softening; X-ray scattering
Issue or Number:17
Classification Code:PACS: 63.20.dd;; 78.70.Ck
Record Number:CaltechAUTHORS:20130627-095811994
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Official Citation:M. S. Lucas, L. Mauger, J. A. Munoz, I. Halevy, J. Horwath, S. L. Semiatin, S. O. Leontsev, M. B. Stone, D. L. Abernathy, Yuming Xiao, Paul Chow, and B. Fultz, J. Appl. Phys. 113, 17A308 (2013), DOI:10.1063/1.4794354
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39120
Deposited By: Jason Perez
Deposited On:01 Jul 2013 20:50
Last Modified:03 Oct 2019 05:04

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