Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 46, Pages 19704-19713Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp103552s
Keywords
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Funding
- NASA [NNX08AY65H]
- U.S. Department of Energy, Office of Basic Energy Sciences
- National Science Foundation
- University of Alabama
- NASA [92679, NNX08AY65H] Funding Source: Federal RePORTER
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Spiral 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.
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