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Bonding and Microstructural Stability in Ni55Ti45 Studied by Experimental and Theoretical MethodsSpiral orbit tribometry friction tests performed on Ni-rich Ni55Ti45 titanium ball bearings indicate that this alloy is a promising candidate for future aerospace bearing applications. Microstructural characterization of the bearing specimens was performed using transmission electron microscopy and energy dispersive spectroscopy, with NiTi, Ni4Ti3, Ni3Ti, and Ni2Ti4Ox phases identified within the microstructure of the alloy. Density functional theory was applied to predict the electronic structure of the NixTiy phases, including the band structure and site projected density of states. Ultraviolet photoemission spectroscopy was used to verify the density of states results from the density functional theory calculations, with good agreement observed between experiment and theory.
Document ID
20110014488
Acquisition Source
Glenn Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Stott, Amanda C.
(NASA Glenn Research Center Cleveland, OH, United States)
Brauer, Jonathan I.
(Alabama Univ. Tuscaloosa, AL, United States)
Garg, Anita
(NASA Glenn Research Center Cleveland, OH, United States)
Pepper, Stephen V.
(NASA Glenn Research Center Cleveland, OH, United States)
Abel, Phillip B.
(NASA Glenn Research Center Cleveland, OH, United States)
DellaCorte, Christopher
(NASA Glenn Research Center Cleveland, OH, United States)
Noebe, Ronald D.
(NASA Glenn Research Center Cleveland, OH, United States)
Glennon, Glenn
(Abbott Ball Co. West Hartford, CT, United States)
Bylaska, Eric
(Pacific Northwest National Lab. Richland, WA, United States)
Dixon, David A.
(Alabama Univ. Tuscaloosa, AL, United States)
Date Acquired
August 25, 2013
Publication Date
November 29, 2010
Publication Information
Publication: The Journal of Physical Chemistry C
Publisher: ACS Publications
Volume: 114
Issue: 46
Subject Category
Metals And Metallic Materials
Report/Patent Number
E-17793
Funding Number(s)
WBS: WBS 877868.02.07.03.01.03.04
CONTRACT_GRANT: NNX08AY65H
Distribution Limits
Public
Copyright
Other

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