Browsing by Subject "Al"

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Browsing by Subject "Al"

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  • Desorbo, Warren; Turnbull, David (2013-09-30)
    It is shown that in very high-purity aluminum, Al_II, the rate of vacancy annealing depends on vacancy concentration and annealing temperature but is independent of the temperature T_i of vacancy injection per se. The rate ...
  • Rowland, T. J.; Fradin, F. Y. (2013-10-01)
    Using a radio‐frequency field pulse technique which enables measurement of slow atomic diffusion by means of nuclear magnetic resonance we have obtained, for nominally 6–9's pure Al, an activation energy for self‐diffusion ...
  • Nowick, A.S. (2013-10-01)
    Torsion experiments on an aluminum‐zinc alloy (21 atomic percent zinc) show that precipitation gives rise to large values of internal friction. After prolonged periods of aging, which are sufficient to produce growth of ...
  • Rowland, T. J.; Fradin, F. Y. (2013-09-30)
    Using a radio‐frequency field pulse technique which enables measurement of slow atomic diffusion by means of nuclear magnetic resonance we have obtained, for nominally 6–9's pure Al, an activation energy for self‐diffusion ...
  • Slichter, Charles P.; Spokas, John J. (2013-09-30)
    Nuclear spin-lattice relaxation times T_1 and phase memory times T_2 have been measured in 99.99% pure aluminum foil from 77°K to the melting point by the spin-echo method. At high temperature the line narrows due to ...
  • Stoebe, T. G.; Gulliver, R. D.; Ogurtani, T. O.; Huggins, R. A. (2013-09-30)
    Motions1 narrowing of nuclear magnetic resonance lines is used to study self diffusion of aluminum in high purity aluminum and in solid solution alloys of aluminum with zinc. magnesium and copper. Diffusion parameters are ...
  • Seeger, A.; Wolf, D.; Mehrer, H. (2013-09-30)
    The various nuclear magnetic resonance techniques used for determining self-diffusion coefficients and activation energies in aluminium are evaluated critically. The data considered most reliable are analyzed together with ...
  • Beyeler, M.; Adda, Y. (2014-01-19)
    Self-diffusion of gold, copper and aluminium has been investigated for single crystals treated under pressures of 0 to 10 kbars in a temperature range of 700 °C to 990 °C for copper and gold and 400-610 °C for aluminium. ...
  • Lundy, T. S.; Murdock, J. F. (2013-10-01)
    Diffusion coefficients of Al^26 and Mn^54 in aluminum have been determined between 450° and 650°C. Low specific activities of the isotopes necessitated use of a thick layer technique. The exact solution to Fick's second ...