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  • 1
    Digitale Medien
    Digitale Medien
    Structure of di[bis(triphenylphosphine)iminium] hexachlororhenate(IV) (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 751-753 
    Details
    ISSN: 1600-5759
    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/S0108270187011910
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Structure of bis(tetraphenylphosphonium) pentaselenide (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 883-885 
    Details
    ISSN: 1600-5759
    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/S0108270188000666
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  • 3
    Digitale Medien
    Digitale Medien
    Further on the chemical reduction of Fe"2(NO)"4(μ-SR)"2
    Amsterdam : Elsevier
    Polyhedron 12 (1993), S. 1261-1263 
    Details
    ISSN: 0277-5387
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0277-5387(00)88222-4
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  • 4
    Digitale Medien
    Digitale Medien
    Chemical reduction of ligated nitrosyl in Fe"2(NO)"4(μ-SR)"2
    Amsterdam : Elsevier
    Polyhedron 11 (1992), S. 851-852 
    Details
    ISSN: 0277-5387
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0277-5387(00)86022-2
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  • 5
    Digitale Medien
    Digitale Medien
    Propagation of shear bands through obstacles in atactic polystyrene (1982)
    Springer
    Journal of materials science 17 (1982), S. 652-670 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract High speed cinematography (up to 6000 frames sec−1), as well as optical and electron microscopy, was used to study the formation and propagation of thin and thick shear bands in atactic polystyrene, with and without obstacles in their paths of propagation. Three different kinds of obstacles were studied, an existing thick band, a fully recovered thick band and a region dispersed with 2 to 6 μm rubber particles (a strip of high impact polystyrene). Except for the fully recovered thick band which behaved like undeformed polystyrene, the other two obstacles effectively reduced the speed of propagation of the shear band packets and changed their mode of operation by dispersing them into thin bands and spreading them out into larger spaces. However, the original localized mode of operation resumed after the shear band packet passed through the obstacles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00540362
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  • 6
    Digitale Medien
    Digitale Medien
    Methanol crazing of coarse shear bands in polystyrene (1983)
    Springer
    Journal of materials science 18 (1983), S. 3047-3053 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract A specimen with coarse shear bands produced at stress concentrations by compression was immersed in methanol to observe craze formation. Thin crazes were initiated at shear bands and joined together while propagating to form thick crazes. Crazes were formed only on the tension side of shear bands with the craze planes perpendicular to the shear bands. When a craze propagated through a shear band, each displaced the other at intersections. Some secondary shear bands were transformed partly into crazes resulting in about a factor of ten increase in thickness. This transformation was achieved by a tensile deformation of fibrous sheets in the shear band with simultaneous production of fine fibres.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00700787
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  • 7
    Digitale Medien
    Digitale Medien
    Reverse shearing of shear bands in polystyrene (1982)
    Springer
    Journal of materials science 17 (1982), S. 3445-3459 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Shear bands produced in polystyrene by compression can be reverse sheared by a second compression in a perpendicular direction. The net shear strain can be zero or negative. Like the forward shear, the reverse shear also produces a ridge on the surface. The height of the ridge seems to be proportional to the reverse shear strain. On the side surface the reverse shear produces a step whose height increases at an average rate of 1.17 mm sec−1 (at a crosshead speed of 1 mm sec−1), estimated by high-speed cinematography at 1000 frames sec−1. During the reverse shear the second compression experiences a yield drop whose size increases with the forward strain due to the first compression. The implications of these results are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00752190
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  • 8
    Digitale Medien
    Digitale Medien
    Fracture of shear bands in atactic polystyrene (1981)
    Springer
    Journal of materials science 16 (1981), S. 1858-1873 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Thick shear bands in polystyrene formed by compression could cause fracture or the formation of cracks by intersecting with themselves, by relaxing after the removal of the load, by propagating all the way to the side surfaces and by subsequent tensile deformation. The microstructural mechanisms involved in all these fracture processes are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00540634
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  • 9
    Digitale Medien
    Digitale Medien
    Morphology and intersections of crazes in polystyrene films (1985)
    Springer
    Journal of materials science 20 (1985), S. 2359-2368 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Craze network with interconnecting crazes was produced in thin (~60nm) polystyrene films by using a spherical stretching method. For 30% and 45% radial strain, the average mesh size, defined as the square root of average non-crazed areas enclosed by crazes, decreased from about 28μm to 4.6 and 2.7μm, respectively, as the molecular weight increased from 46 900 to 1 350 000. At a molecular weight of about 106, the interactions between crazes became evident by the split and change of directions at the end of their propagation. Two types of intersection appeared to exist in parallel. The first type showed void formation at the intersections with no apparent fibril displacement effect. The second type showed that the fibrils at the intersection of two perpendicular crazes reoriented to a new direction which seemed to be determined by the relative displacements of the two crazes at the intersections. This observation suggests that the craze fibrils can be displaced and further stretched by a second crazing process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00556065
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  • 10
    Digitale Medien
    Digitale Medien
    Direct observation of compressive deformation of PBO fibre in the SEM (1992)
    Springer
    Journal of materials science 27 (1992), S. 5645-5652 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Polybenzobisoxazole fibres were compressed uniaxially in a tension-compression stage for direct observation of deformation in a scanning electron microscope. Kink bands were observed to develop on the fibre surface at early stages of deformation. They seemed to initiate heterogeneously and propagate across a large part of the fibre. Both the length and thickness of the band increased dramatically with slight compression. Upon continued deformation, cracks or openings were seen to develop from surface irregularities near the kink bands. The cracks or openings extended along the fibre length while new bands continued to develop adjacent to them. Cracks and kink bands seemed to be mutually inducible to result in a localized bulge at later stages of deformation. In Kevlar 49 fibres, cracks or openings seemed to develop at higher compressive strains notably at intersections of kink bands.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00541637
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