Results 271 to 280 of about 61,570 (313)

Structural and magnetic properties of metastable fcc Cu-Fe alloys

Physical Review B, 1996
The structural properties of the metastable fcc Cu-Fe alloys obtained by high-energy ball milling of elemental powders have been studied by transmission electron microscopy. The same technique has been used to study the effect of thermal annealing on the alloyed samples.
, Mazzone, , Antisari
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Quantum corrections to the conductivity in icosahedral Al-Cu-Fe alloys

Physical Review B, 1992
We report measurements of the temperature and magnetic-field dependence of the resistivity in single-phase icosahcdral Al-Cu-Fe alloys between 0.15 and 41 K and fields up to 8.8 T. The data are consistent with the predictions of weak localization and electron-electron-interaction theories, even though the disorder parameter (k F l e ) -1 is larger ...
, Sahnoune, , Ström-Olsen, , Zaluska
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Local Structure and Stability of Amorphous Cu–Fe–Zr Alloys

Materials Science and Engineering, 1988
The local structure and stability of amorphous Cu60 − xFexZr40 were investigated by Mossbauer effect and differential scanning calorimetry measurements. The isomer shift decreased with increasing iron concentration for x 5. The activation energy of crystallization was 5.5–5.8 eV for x 5.
M. Taniwaki, E. Hatta, M. Maeda
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Density and Surface Tension of Liquid Ternary Ni–Cu–Fe Alloys

International Journal of Thermophysics, 2006
Abstract Density and surface tension of liquid Ni –Cu –Fe alloys have been measured over a wide temperature range, including the undercooled regime. A non-contact technique was used, consisting of an electromagnetic levitator, an optical densitometer, and an oscillating drop tensiometer. At temperatures above and below the
Brillo, J., Egry, Ivan, Matsushita, T.
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Electronic distributions of states in crystalline and quasicrystalline Al-Cu-Fe and Al-Cu-Fe-Cr alloys

Journal of Physics: Condensed Matter, 1992
Valence and conduction state distributions in a series of Al-Cu-Fe and Al-Cu-Fe-Cr alloys of different structural states and nominal compositions have been investigated by means of soft X-ray emission and photoabsorption spectroscopies. A complete description of the valence band is obtained.
E Belin, Z Dankhazi, A Sadoc, Y Calvayrac, T Klein, J -M Dubois   +5 more
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Study of mechanically alloyed nano Cu-Fe particles with a heterostructure

physica status solidi (a), 2004
The magnetic alloys of Cu-Fe (Cu 50 Fe 50 , Cu 80 Fe 20 and Cu 90 Fe 10 ) were prepared by a mechanical alloying method and their structural and magnetic behaviors were examined by X-ray diffraction and Mossbauer spectra. The magnetization curves did not distinctly show the saturation at 70 kOe for the concentrated alloys of Cu 80 Fe 20 and Cu 90 Fe ...
Y.R. Uhm, H.M. Lee, C.K. Rhee
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Strength and conductivity ofin situ Cu-Fe alloys

Journal of Materials Science, 1989
Alloys of Cu-Fe with iron contents from 10 to 30 wt % have been prepared by casting plus mechanical reduction. A series of heat treatments was done at various stages of the mechanical reduction to promote precipitation of the iron from the copper matrix with the hope of optimizing electrical conductivity at a given strength level.
J. D. Verhoeven, S. C. Chueh, E. D. Gibson   +2 more
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Plastic deformation in an Al–Cu–Fe icosahedral alloy

Journal of Materials Research, 1993
Al—Cu—Fe quasicrystalline alloys have been deformed by high-temperature creep between 680 and 740 °C. Deformations greater than 30% were achieved without cracking. Analysis of the data in the quasi-steady state regime reveals power law behavior with a stress exponent of 2.5. The activation energy for deformation was determined to be 640 ± 20 kJ/mole in
J.E. Shield, M.J. Kramer, R.W. McCallum
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A Mossbauer study of early precipitation in Cu-Fe alloy

Journal of Physics: Condensed Matter, 1994
Mossbauer spectroscopy was used to study the early stages of precipitation in Cu-0.6 at.% Fe alloy. A set of data for the concentration of iron in solution was obtained for annealing times from 1 to 105 s at 400 degrees C. The results were interpreted in terms of quenched monovacancies and divacancies.
I Spirov, T Tomov, S Asenov
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The nature of protective films formed on a CuFe alloy

Corrosion Science, 1969
Abstract A Cu alloy (CDA 194) containing α-Fe particles in a Cu matrix develops protective corrosion product films in chloride solutions after an initial period of relatively rapid attack. The protective film is a mixture of Cu2O and lepidocrocite. The lepidocrocite produces significant polarization of the cathodic reduction of dissolved oxygen which
R.F. North, M.J. Pryor
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