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  • 1
    Electronic Resource
    Electronic Resource
    Group-theoretical consideration of the CSL symmetry (1985)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 440-445 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A theoretical analysis for the computation of the coincidence site lattice (CSL) symmetry is presented. It is shown that three types of symmetry elements can exist and each one can be found by properly using the CSL's rotation matrix of the smallest-angle description. Thus, from the existence of the subgroup H1, the order of which is directly connected with the number of the different orientations that the sublattice Λ11 can have, a low-symmetry H1 group implies more possibilities for the formation of the corresponding CSL. From the existence of the symmetry elements of the second type, the smallest-angle rotation matrix can be a symmetry element but only of the fourth or sixth order. From the third type of elements a connection between CSLs of different Σvalues can exist. Since the analytical form of this smallest-angle rotation matrix can be deduced for every crystallographic system, the procedure described here is of general use. Thus a new classification of the different CSLs is possible according to their symmetry group. This allows the study of the CSL model from the symmetry point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767385000939
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Greek university law defended (1993)
    [s.l.] : Nature Publishing Group
    Nature 362 (1993), S. 489-489 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR — I wish to comment on the letter from Emmanuel Papamichael (Nature 360, 704; 1992) on the new university law recently adopted by the Greek parliament. The letter is one-sided and misleading. Before the law was introduced in the Greek parliament, there was an extremely long ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/362489a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Use of the CSL symmetrically equivalent descriptions tables in the DSC lattice base computation (1985)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 445-451 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A combination of analytical expressions and a knowledge of symmetry is employed for the displacement shift complete lattice (DSCL) base computation. The method is of general use and its application to cubic and hexagonal systems is given. Tables containing all the symmetrically equivalent descriptions of one and the same coincidence site lattice (CSL) as a function of one description are given for both cubic and hexagonal systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767385000940
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Growth and misfit accommodation of β-SiC precipitates in silicon as implanted by oxygen (1989)
    Springer
    Journal of materials science 8 (1989), S. 1374-1377 
    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/10.1007/BF00720191
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    On the phase diagram of the Ga-Te system in the composition range 55 at % Te (1981)
    Springer
    Journal of materials science 16 (1981), S. 733-738 
    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 Monoclinic Ga-Te was heated in the electron microscope. At about 800° C decomposition was observed and after cooling down to room temperature, two compounds were identified: the fcc Ga2Te3 and the Ga3Te4, for which a trigonal structure was identified. A relation between the three structures of Ga-Te, Ga3Te4 and Ga2Te3 is put forward.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02402790
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A ∑=27 coincidence grain boundary in a Cu-Ni alloy (1982)
    Springer
    Journal of materials science 17 (1982), S. 3361-3370 
    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 A systematic method has been used to characterize a particular grain boundary in a Cu-Ni alloy. Its multiplicity is ∑=27a and a deviation from that orientation has been calculated and expressed by a small-angle rotation matrix. The deviation angle of 50′ has been calculated by electron diffraction patterns and also on the basis of the intrinsic dislocation structure. These have been found to be of the same type as the matrix dislocations, having also a relation to the ∑=276a orientation relationship.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01203506
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    On the phase diagram of the Ga-Te system in the composition range 55 at % Te (1981)
    Springer
    Journal of materials science 16 (1981), S. 733-738 
    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 Monoclinic Ga-Te was heated in the electron microscope. At about 800° C decomposition was observed and after cooling down to room temperature, two compounds were identified: the fcc Ga2Te3 and the Ga3Te4, for which a trigonal structure was identified. A relation between the three structures of Ga-Te, Ga3Te4 and Ga2Te3 is put forward.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552211
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Pyramidal slip in electron beam heated deformed Titanium (1996)
    Springer
    Interface science 3 (1996), S. 195-201 
    Details
    ISSN: 1573-2746
    Keywords: slip transmission ; grain boundaries ; residual dislocations ; image simulation ; Titanium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The incidence of perfect glide dislocations, moving on parallel pyramidal slip bands on a particular grain boundary of deformed Titanium is studied by means of Transmission Electron Microscopy. Static experiments, performed by using the electron beam as a heating source, proved that slip propagation across the interface is possible when the angle of intersections between the activated slip planes of the incoming and the outgoing dislocations with the boundary plane is minimised. Additionally, the Burgers vector of the residual dislocations left in the boundary after slip transmission occurred should also be minimised. Due to their very small Burgers vector, residual dislocations are visualised with satisfactory results by an image simulation method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191046
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    Paper (German National Licenses)
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