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  • 1975-1979  (8)
  • 1955-1959  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Initial stages of decomposition in Cu–9Ni–6Sn (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 476-480 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The early stages of the decomposition process in the ternary Cu-9 wt.% Ni-6 wt.% Sn alloy have been studied by transmission electron microscopy. The supersaturated solid solution was found to decompose through the spinodal mechanism into periodic and aligned regions which are Sn-rich and Sn-lean. It was also found that in addition to this clustering reaction, an ordering reaction also progressed with the ageing treatment to produce a metastable phase with the DO22 (Al3Ti type) structure. However, on prolonged ageing, a discontinuous reaction started at the grain boundaries and consumed the matrix leaving behind colonies of a pearlitic product composed of the equilibrium α (A1 structure) and the γ (DO3 structure) phases. This paper discusses the mechanism of formation of the DO22 phase in the alloy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879013066
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Four Elastic Constants of Diamond (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 518-520 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To achieve this, three values of the frequency shifts must be assumed. For convenience, the shifts of the longitudinal component arising from the elastic waves moving approximately along the direction [144], which is inclined at about 10 to [011], and the longitudinal and transverse components of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/182518b0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stress Optical Coefficients of Different Specimens of Vitreous Silica (1958)
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 692-693 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The 'OH' quality was irradiated by neutrons in the APSARA reactor (Trombay) by the courtesy of the Indian Atomic Energy Commission. The Integrated neutron flux hours were 47 X 10U neutrons/cm.2. The specimen was coloured violet-brown after irradiation. The variation of C with wave-length for the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/181692a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Dispersion of the Photoelastic Constants of Fused Silica (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 540-541 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. The stress optical coefficient of vitreous silica The value of q12 increases from 2-35 x 10~13 at 2300 A. to 2-49 X 10"18 at 5500 A., and that of qix increases from 0-24 X 10"18 at 2300 A. to + 0-11 10~13 at 5500 A. (q12 and qlt are given in c.g.s. units). The variation of the stress ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/179540b0
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  • 5
    Electronic Resource
    Electronic Resource
    Polar Kerr rotation spectra in yttrium iron garnet and lithium ferrite: A comparative study (1979)
    Springer
    Applied physics 18 (1979), S. 243-247 
    Details
    ISSN: 1432-0630
    Keywords: 78.20L ; 75.50G
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Polar Kerr rotation (PKR) spectra in the range 2.0–5.7 eV at 295 K of lithium ferrite and yttrium iron garnet (YIG) single crystals are reported. The spectra show more details and cover a more extended energy region than those published so far. The interpretation of the spectra is based on the assumptions that 1) PKR is an odd function of the sublattice magnetic moments 2) the origin of PKR in both compounds is of similar nature, the differences due to the different crystal structures (garnet and spinel) being less important. The calculated PKR sublattice components show some similarities in their energy dependences, the magnitude of the tetrahedral sublattice component being higher than that of the octahedral one. The components were used in the calculation of the PKR spectra in diamagnetically substituted yttrium iron garnet (J. Appl. Phys.49, 2212, 1978). The results correctly predict the trends observed experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885509
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  • 6
    Electronic Resource
    Electronic Resource
    Adiabatic Piezo-Optic Coefficient of Heavy Water (1957)
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 497-498 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The adiabatic piezo-optic coefficient was determined by an interferometric technique1 employing a Rayleigh-Zeiss refractometer, and adequate precautions were taken to eliminate errors due to expansion of the cell, etc. The measured value of the adiabatic piezo-optic coefficient for sodium D line ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/180497a0
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Tempering of a beta quenched Zr-1.9wt % Cr alloy (1979)
    Springer
    Journal of materials science 14 (1979), S. 1407-1412 
    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 room temperature tensile properites of a Zr-1.9 wt % Cr alloy have been examined in the beta quenched as well as in tempered conditions and the results have been rationalized in terms of possible hardening mechanisms. The appearance of the fracture surfaces has been correlated to the microstructures developed in the alloy after various heat-treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549315
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  • 8
    Electronic Resource
    Electronic Resource
    Tempering of a beta quenched Zr-1.9 wt % Cr alloy (1979)
    Springer
    Journal of materials science 14 (1979), S. 1398-1406 
    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 precipitation of ZrCr2, which is a Laves phase with the C15 structure, in a supersaturated, martensitic matrix has been studied in a Zr-1.9 wt % Cr alloy using transmission electron microscopy. The nucleation, morphology and distribution of the precipitates has been examined at different tempering temperatures. The crystallographic orientation relationship between the α-Zr(Cr) and the ZrCr2 phases has been established and the precipitate habit plane determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549314
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  • 9
    Electronic Resource
    Electronic Resource
    Tempering of a beta quenched Zr-1.9 wt % Cr alloy (1979)
    Springer
    Journal of materials science 14 (1979), S. 1389-1397 
    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 morphology and the substructure characterizing the martensite produced on beta quenching a Zr-1.9 wt % Cr alloy have been examined by optical and transmission electron microscopy. The structural changes that occur in the martensite structure on tempering at various temperatures in the α+ZrCr2 phase field have also been investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549313
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  • 10
    Electronic Resource
    Electronic Resource
    Formation of a DO19 phase in zirconiumaluminium martensites (1978)
    Springer
    Journal of materials science 13 (1978), S. 2066-2068 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552922
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