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  • 1
    Electronic Resource
    Electronic Resource
    X-ray determination of the Debye temperature at high pressure using high-energy synchrotron radiation (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 2719-2722 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The volume dependence of the x-ray Debye temperature in aluminum at high pressure up to 6 GPa was measured with high-energy synchrotron radiation at the National Laboratory for High Energy Physics. High-pressure high-temperature diffraction experiments were carried out by use of a multianvil press system with the energy-dispersive diffraction method. The Debye temperature was determined from the integrated intensity ratio at different temperatures. In order to avoid the intrinsic anharmonic effects and the influence of the energy shift for the Bragg diffraction due to the thermal expansion, constant volume was maintained in a sample by controlling the pressure at elevated temperatures. The interpolated values of the Debye temperature and the Grüneisen parameter of the atmospheric volume were θD0 =367 K and γ0 =3.0, respectively. Excellent agreement was found upon comparison with the published results of conventional experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346446
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High-pressure generation by a multiple anvil system with sintered diamond anvils (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 922-925 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: High-pressure experiments using a multiple anvil high-pressure system with sintered diamond anvils are presented and discussed. Pressures in excess of 41 GPa were obtained, on the basis of the lattice constants of gold determined by the in situ x-ray diffraction technique using synchrotron radiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140344
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Consolidation of Mg--Al--Zn quasicrystalline powder by a high-pressure technique and its mechanical properties (1997)
    Springer
    Journal of materials science 16 (1997), S. 2032-2035 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018552515460
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  • 4
    Electronic Resource
    Electronic Resource
    Consolidation of C60 powder by a high-pressure technique up to 5.4 GPa and its mechanical properties (1999)
    Springer
    Journal of materials science 18 (1999), S. 1633-1636 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006648910061
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  • 5
    Electronic Resource
    Electronic Resource
    Elastic and superconducting properties of supersaturated Al-Si and Al-Ge solid-solution alloys treated under a 5.4 GPa pressure (1993)
    Springer
    Journal of materials science 28 (1993), S. 5836-5842 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Supersaturated Al-Si and Al-Ge solid solutions having up to a 10 at% solute concentration were treated at 5.4 GPa. The variations in the elastic moduli, superconducting transition temperature T c and other physical properties were obtained. Using the resonance method the moduli of the solid solutions in both alloy systems decreased with increasing solute concentration, in contrast with those of the two-phase states which increased. The maximum value of T c was determined as 6.6 K for an Al-15 at% Si solid solution. It was confirmed that the dependence of T c on the valence electron concentration was remarkably greater than that of other non-transition and noble metal alloys. Using low-temperature specific-heat experiments as a basis, the superconducting properties were discussed in terms of the electronic specific heat coefficient and the Debye temperature in comparison with other metallic superconductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365190
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  • 6
    Electronic Resource
    Electronic Resource
    High-pressure phase diagram of an aluminium-rich Al-Li alloy at a pressure of 5.4 GPa (1993)
    Springer
    Journal of materials science 28 (1993), S. 6567-6570 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The high-pressure phase diagram of an aluminium-rich Al-Li alloy at a 5.4 GPa pressure was investigated. To determine the equilibrium state under high-pressure and high-temperature conditions, the quenching method was applied and a phase analysis of the sample was performed using X-ray diffraction and microscopic observations. The experimental results were then compared with a thermodynamic theoretical calculation and good agreement was found. The resultant solid solubility of lithium in aluminium was subsequently increased up to 20 at % and the eutectic temperature increased up to 800 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356395
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  • 7
    Electronic Resource
    Electronic Resource
    Variations of elastic moduli during ageing process of Al-Li solid solutions treated at high pressure (1996)
    Springer
    Journal of materials science 31 (1996), S. 3009-3013 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Supersaturated Al-10 and 15 mol% Li solid solutions were prepared by means of heat treatments under high pressure and high temperature, and the variations of elastic modulus, electrical resistivity and micro-Vicker's hardness in these solid solutions during isochronal ageing up to 673 K were investigated. The maximum shear modulus was observed during the precipitation of the δ′ phase at 453 K ageing. The difference in the decomposition behaviour of several specimens obtained by high-pressure solid solutioning and the conventional one is discussed based on the results of elastic moduli measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356016
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  • 8
    Electronic Resource
    Electronic Resource
    Elastic moduli of Al-Li alloys treated at a high pressure of 5.4 GPa (1996)
    Springer
    Journal of materials science 31 (1996), S. 3309-3313 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The elastic moduli of high pressure treated supersaturated Al-Li solid solutions were measured. An interesting elastic behaviour was observed, in that, the bulk modulus decreased with an increase in the lithium content, whereas the Young's modulus and shear modulus increased. In order to clarify this property, we investigated the compressibility of the Al-Li supersaturated solid solutions prepared by high-pressure solid-solidification by high-pressure Synchrotron X-ray diffraction. The obtained pressure-volume relations were fitted to Birch's equation of state. The calculated bulk moduli were lower than those of pure Al at a reduction of about 0.6 GPa per mol% Li. The temperature dependence of the elastic modulus for those supersaturated solid solutions was also measured, and it was found that the trend in the variation of the elastic modulus against the lithium concentration was maintained in the temperature range of 5–290 K. Therefore the attractive relationship between the bulk modulus and Young's modulus was demonstrated to be intrinsic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00354683
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  • 9
    Electronic Resource
    Electronic Resource
    Superconducting and mechanical properties of YBCO/Ag composites fabricated at high pressures up to 5.4 GPa (1991)
    Springer
    Journal of materials science 26 (1991), S. 737-742 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The YBCO/Ag superconducting composites were fabricated by compressing powders of YBCO and silver mixed at various volume proportions 0 to 100% under pressures of 2.0 and 5.4 GPa and subsequently sintering at 900 °C for 10 h in a flowing oxygen atmosphere. The superconducting transition temperature, particularlyT c (R=0), was found to retain the value above 85 K up to 50 vol % Ag while the normal resistivity at 300 K to reduce below 10 μΩcm. The highestJ c of 400 Acm−2 was attained for the sample containing 20 vol % Ag pressed at 5.4 GPa. The mechanical properties were also improved by the addition of silver: the compressive strength is increased by two to three times and the maximum strain, which is a measure of ductility, reached a value almost four times as large as that in the pure YBCO prepared under the ordinary pressure of 0.5 GPa. The persistence of the superconducting characteristics up to 70 vol % Ag is discussed in terms of the microstructure taken with the scanning electron microscope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588312
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