ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • American Institute of Physics (AIP)  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Lattice instability analysis of a prototype intermetallic system under stress (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 1449-1458 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The unstable structural responses of a model intermetallic lattice to hydrostatic and uniaxial loadings have been determined by elastic stability analysis and molecular-dynamics simulations. Two crystalline phases of Ni3Al, the naturally occurring L12 and a hypothetical D022, are analyzed to correlate the effects of structural symmetry with stress-induced lattice deformations. Under isotropic expansion, the former fcc lattice develops extensive cavitation and amorphization at critical isotropic tensile loading, whereas the latter, a tetragonal lattice, shows cleavage behavior. These qualitative differences do not appear in the elastic stability analysis. Both phases show similar responses to uniaxial tension. In all cases critical strains for lattice instability predicted on the basis of elastic stiffness coefficients are found to be in good agreement with direct simulations. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359577
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Molecular dynamics calculation of the Zr(Ni) enthalpy of mixing (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 1701-1703 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Zr-terminal portion of the Ni–Zr phase diagram was studied by means of molecular dynamics simulations. The internal energy and the enthalpy of mixing at 300 K of the α- and β-Zr(Ni) solid solutions and of the Zr–Ni amorphous phase were calculated for Ni concentrations ≤10 at. %. The values of the enthalpy of mixing obtained are positive for the terminal solid solutions, and negative for the amorphous phase. This behavior is attributed to the differences in strain energy generated in the Zr lattice or in the amorphous phase by Ni atoms. Implications of these results relevant to the problem of amorphization in metallic systems by solid-state reactions are discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118002
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Vibrational modes of graphitic fragments and the nucleation of carbon nanotubes (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 3308-3314 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We study the nucleation of carbon nanotubes based on the hypothesis that a cylindrical seed can be formed by the spontaneous rolling of a small graphite fragment under thermal fluctuations. We calculate the vibrational spectra of fragments of different sizes by means of a tight-binding model, and compare the spectra to that of an infinite graphite sheet, as a function of temperature. The spectra of finite-size fragments contain an increasing density of low-frequency, large amplitude modes with increasing temperature; it is shown that such modes tend to fold over the fragment into a cylindrical shape. Finally, direct tight-binding molecular-dynamics simulations of the high-temperature fluctuation of parallel graphite fragments demonstrate that nanotube seeds closed at one end can spontaneously form. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1387448
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...