title: Inherent tensile strength of molybdenum nanocrystals.
abstract: The strength of Mo nanorods was measured under uniaxial tension. Tensile tests of 〈 110〉-oriented single-crystalline molybdenum rod-shaped specimens with diameters from 25 to 90 nm at the apex were conducted inside a field-ion microscope (FIM). The nanocrystals were free from dislocations, planar defects and microcracks, and exhibited the plastic mode of failure under uniaxial tension with the formation of a chisel-edge tip by multiple gliding in the [Formula: see text] and [Formula: see text] deformation systems. The experimental values of tensile strength vary between 6.3 and 19.8 GPa and show a decrease with increasing nanorod diameter. A molecular dynamic simulation of Mo nanorod tension also suggests that the strength decreases from 28.8 to 21.0 GPa when the rod diameter increases from 3.1 to 15.7 nm. The maximum values of experimental strength are thought to correspond to the inherent strength of Mo nanocrystals under uniaxial tension (19.8 GPa, or 7.5% of Young's modulus).
authors.affiliation: G V Kurdyumov Institute for Metal Physics, National Academy of Sciences of the Ukraine, 36 Vernadsky Blvd., 03680 Kyiv-142, Ukraine.
authors.forename: Anatoly P
authors.initials: AP
authors.lastname: Shpak
authors.affiliation: G V Kurdyumov Institute for Metal Physics, National Academy of Sciences of the Ukraine, 36 Vernadsky Blvd., 03680 Kyiv-142, Ukraine.
authors.forename: Sergiy O
authors.initials: SO
authors.lastname: Kotrechko
authors.affiliation: National Scientific Center, Kharkov Institute of Physics and Technology, Academicheskaja, 1, 61108 Kharkov, Ukraine.
authors.forename: Tatjana I
authors.initials: TI
authors.lastname: Mazilova
authors.affiliation: National Scientific Center, Kharkov Institute of Physics and Technology, Academicheskaja, 1, 61108 Kharkov, Ukraine.
authors.forename: Igor M
authors.initials: IM
authors.lastname: Mikhailovskij
keywords: field evaporation; field-ion microscopy; molybdenum; nanocrystal; strength