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  • 1
    Digitale Medien
    Digitale Medien
    An electron diffraction study of a pre-martensitic In–24 at.% Tl alloy (1984)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 555-560 
    Details
    ISSN: 1600-5740
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0108768184002688
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  • 2
    Digitale Medien
    Digitale Medien
    The superconductivity and metallurgy of C15 materials: Hf-V and Zr-V (1978)
    Springer
    Applied physics 17 (1978), S. 165-172 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 74
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Variation of theT c as a function of composition for the C15 materials of the systems Hf−V and Zr−V was investigated. Samples in the as cast and annealed conditions were examined by x-ray and optical metallography. None of the samples was found to be of single phase. For the Hf−V system,T c increases to a constant value of about 9 K for the compositions between 36 and 60 at. %V. A slight increase ofT c between 60 and 70 at. %V and a degradation inT c above 80 at. %V were observed. As cast materials show the maximumT c value of 9.4 K. Deviations from stoichiometry and heat treatments produce considerable changes in the microstructures but have little effect onT c . A slight enhancement ofT c for the alloy containing 80 at. %V is explained by the pressure on V2Hf due to V phase by the differential thermal contraction. For the Zr−V system, maximumT c value of 8–6 K was observed for alloys having 20–66 at. %V in as cast condition. Heat treatments cause the lowering ofT c . Results indicate that the preparation of ZrV2 superconducting material will need more careful control than would be necessary for HfV2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00885250
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  • 3
    Digitale Medien
    Digitale Medien
    Thermodynamic study of the magnetic ordering of Fe3−x Mn x Si alloys (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 617-626 
    Details
    ISSN: 1572-9567
    Schlagwort(e): domain configuration ; irreversible magnetization ; spin-glass ; thermal expansion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The compounds Fe3−x Mn x Si exhibit a complex magnetic behavior for 0.6⩽x⩽1.75 involving ferromagnetic ordering followed by a reordering at lower temperature. Measurements of the thermal expansion α and the specific heat C p show only a weak anomaly at the Curie temperature, T C, whereas a large, relatively sharp peak occurs at the magnetic reordering temperature, T R. Thermal expansion measurements for the Fe2.2Mn0.8Si compound made about T R are indicative of long-range ordering that can be suppressed in an applied field of ∼0.4T. Magnetization measurements show that low fields, 1–2 mT, strongly influence the bulk magnetization. Irreversible magnetization behavior, similar to that in spin-glass systems, is displayed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00534217
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  • 4
    Digitale Medien
    Digitale Medien
    Optical microscopy observations of transformation dynamics and effects of aging on the transformation temperatures in a Au-49.5at.%Cd alloy (1999)
    Springer
    Journal of materials science 18 (1999), S. 2045-2047 
    Details
    ISSN: 1573-4811
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006714706958
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  • 5
    Digitale Medien
    Digitale Medien
    Quantitative Raman spectroscopy of Mg–PSZ ceramics (1998)
    Springer
    Journal of materials science 33 (1998), S. 3849-3851 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Micro-Raman spectra were collected from an MS (maximum strength) grade Mg–PSZ sample. Both the Mg–PSZ sample and the laser polarization were rotated and the resulting spectra examined. Quantitative analyses of these spectra showed significant variation arising from the effect of grain orientation with respect to the laser polarization direction. The minimum collection volume necessary for reproducible spectra was assessed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1004647301931
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  • 6
    Digitale Medien
    Digitale Medien
    The critical current density of deformed and annealed superconducting Nb-26% Zr and Nb-32% Zr and its dependence on the amount of deformation (1972)
    Springer
    Journal of materials science 7 (1972), S. 1391-1400 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract A study of the low-field critical current densities (computed from magnetization data) which can be achieved by heat-treating for 1 h Nb-Zr alloys deformed various amounts, has shown that a peak critical current density is always reached after annealing at around 750°C. The magnitude of this peak depends upon the amount of deformation, but is not increased by deforming beyond 80%. Superconducting transition temperatures are also reported. The microstructure was unusual in that deformation was very unevenly distributed and there was little tendency for the dislocations to cross-slip or to form a cellular structure. Precipitation ofΒ Zr occurred in regions of high deformation only, so that equilibrium was not achieved below 80% deformation. The measured superconducting properties are explained in terms of this microstructure, withΒ Zr as the dominant flux pinning agent.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00574931
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