Now showing items 21-40 of 52

    • Temperature Variation of the Elastic Constants of Cubic Elements. I. Copper 

      Overton, W.C.; Gaffney, John (1954-09-08)
      The ultrasonic pulse technique has been used in conjunction with a specially devised cryogenic technique to measure the velocities of 10-Mc/sec acoustic waves in copper single crystals in the range from 4.2°K to 300°K. The ...
    • Measurement of Equilibrium Concentrations of Vacancies in Copper 

      Simmons, RO; Balluffi, RW (2014-07-02)
      The net added fraction of thermally-generated atomic sites, ΔNN, has been measured, during equilibrium heating to near the melting point, in a coarse-grained copper bar of 99.999% purity. The linear thermal expansion, ΔLL, ...
    • Nature of Long-Range Order in Cu3+xAu1-x 

      Gehlen, P. C.; Cohen, J. B. (2003-11-17)
      The diffuse scattering and intensities of Bragg peaks from single crystals of Cu77Au23 and Cu78Au22 have been studied for various degrees of long‐range order. The results indicate that the excess Cu atoms, replacing Au in ...
    • Lattice Parameters, Densities, Expansion Coefficients and Perfection of Structure of Cu and Cu-In alpha Phase 

      Straumanis, M. E.; Yu, L. S. (1969-04-08)
      Spectroscopically pure Cu has a lattice parameter a25 = 3.61491 Å (corrected for refraction), and a thermal expansion coefficient [alpha] = 14.87 × 10-6°C-1 between 15 and 55°C. The measured density d25 is 8.9314 ± 0.0002 ...
    • Thermal Dilation of Copper 

      Eppelsheimer, D.S.; Penman, R. R. (1950-01-07)
      The prediction that certain cubic metals may not be precisely cubic throughout a range of temperature below their melting points led to the present investigation. Pure copper was chosen as the cubic metal to examine for ...
    • The Thermal Expansion of Pure Metals: Copper, Gold, Aluminum, Nickel, and Iron 

      Nix, F. C.; MacNair, D. (1941-08-08)
      Extremely accurate determinations of the linear thermal expansions have been made interferometrically from — 196°C to temperatures about +400°C for Al and +700°C for Fe, Ni, Cu and Au. The relationship between true thermal ...
    • Examination of Ni-base superalloy diffusion couples containing multiphase regions 

      Campbell, Carelyn; Zhao, J-C; Henry, M. F. (2014-04-02)
      Four Ni-base superalloy diffusion couples with multiphase regions were studied. The diffusion couples contained single-phase (gamma ), two phase( gamma +MC carbide) and three-phase ( gamma + gamma prime+MC carbide) ...
    • Tracer Diffusion of Magnesium in Aluminum Single Crystals 

      Rothman, S. J.; Peterson, N. L.; Nowick, L. J.; Robinson, L. C. (2014-02-16)
    • Study of Si self-diffusion by nuclear techniques 

      Demond, F. J.; Kalbitzer, S.; Mannsperger, H.; Damjantschitsch, H. (2014-02-10)
      By using ion implantation for preparation and p, γ-reactions for analysis of 30Si profiles the Si self-diffusion has been studied in the temperature range of 830–1200°C. The results reveal unambiguously that the diffusion ...
    • Annealing Kinetics of Voids and the Self-Diffusion Coefficient in Aluminum 

      Volin, T. E.; Balluffi, R. W. (2014-01-20)
      The annealing kinetics of voids in 99.9999 wt% pure aluminum were studied over the temperature range 85 to 209 °C in thin specimens by transmission electron microscopy. The isothermal shrinkage of individual voids was ...
    • Self-diffusion in aluminum at low temperatures 

      Burke, J.; Ramachandran, T. R. (2014-01-20)
      Values of the self-diffusivity of pure aluminum in the temperature range 130∮ to 200° have been determined by measuring the rate of annealing of prismatic and faulted dislocation loops in thin foils of quenched 99.999 pct ...
    • Al Self-diffusion, Messer et al. 1974 

      Messer, R.; Dais, S.; Wolf, D. (2014-01-19)
    • Al Self-diffusion, Beyeler 1968 

      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. ...
    • Al Self-Diffusion Fradin, Rowland 1967 

      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 ...
    • Mg Self-Diffusion Pavlinov 1968 

      Pavlinov, L. V.; Gladyshev, A. M.; Bykov, V. N. (2013-08-29)
      It is found that the parameters of self-diffusion and carbon diffusion in calcium are in good agreement with the general regularities for self-diffusion in pure metals and interstitial impurity diffusion in metals with a ...
    • Mg Self-Diffusion 

      Shewmon, P. G.; Rhines, F. N. (2013-08-09)
      The determination of the self-diffusion coefficient of magnesium has been made possible recently by discovery of a radioactive isotope, Mg-28 having a half-life of 21.3 hr, and subject to manufacture in useful quantity.
    • Mg Self-Diffusion 

      Combronde, J.; Brebec, G. (2013-08-09)
      The self-diffusion of magnesium along the c-axis and perpendicular to it has been investigated in the temperature range from 500 to 630 C.
    • Cr Self-Diffusion Paxton Gondolf 1959 

      Paxton, H. W.; Gondolf, E. G. (2013-07-08)
      Measurement of the radioactivity of the surface reduced by partial diffusion of the radioactive chromium as well a measurement of the radioactivity after gradual working off of thin surface films, after coating radioactive ...
    • Cr Self-Diffusion Askill and Tomlin 1965 

      Askill, J.; Tomlin, D. H. (2013-07-08)
      Self-diffusion measurements have been made in the temperature range 1000 degrees c to 1550 degrees c in order to resolve some uncertainties arising from previously published data from several separate investigations covering ...
    • Cr Self-Diffusion Askill 1971 

      Askill, J. (2013-07-08)
      Self diffusion of Cr-51 in pure chromium, Cr +20 wt% Ni, Cr +44wt% Ni, and Cr +65%wt Ni has been measured over the temperature ranges of 1000 to 1900, 1000 to 1525, and 900 to 1350 degrees C, respectively.