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  • 1990-1994  (5)
  • 1
    Electronic Resource
    Electronic Resource
    X-Ray Tomographic Microscopy (XTM) Using Synchrotron Radiation (1992)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Materials Research 22 (1992), S. 121-152 
    Details
    ISSN: 0084-6600
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ms.22.080192.001005
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    SAXS investigations on organic aerogels (1991)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 24 (1991), S. 771-776 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Structural properties of organic aerogels were studied by ultra-small-angle X-ray scattering (USAXS) at the Synchrotron Radiation Laboratory HASYLAB at DESY, Hamburg, Germany. The organic aerogels were synthesized from the base-catalyzed sol–gel polymerization of resorcinol with formaldehyde (RF) followed by a supercritical drying process. RF aerogels are low-density materials with a solid matrix composed of interconnected colloidal-like particles. Scattering experiments were carried out using a crystal camera optimized for ultra-small-angle X-ray scattering with synchrotron radiation. The measured SAXS profiles revealed a scattering power depending upon synthetic conditions of the gels. RF aerogels were found to be homogeneous at length scales greater than 20 nm. From Guinier plots, radii of gyration Rg of 3–20 nm were computed. Rg appears to be a measure of the pore (cell) size. Although fractal silica aerogels show similar characteristics, fractal behavior of the organic aerogels is uncertain. These materials are best described as random aggregates of smooth colloidal like particles with open-cell porosity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889890011815
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The topology of percolating porosity in woven fiber ceramic matrix composites (1994)
    Springer
    Applied composite materials 1 (1994), S. 325-331 
    Details
    ISSN: 1573-4897
    Keywords: Composite ; Percolation ; Chemical vapor infiltration (CVI) ; Porosity ; Tomography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Three-dimensional x-ray microtomography has been used to visualize porosity in ceramic matrix composites during chemical vapor infiltration processing. The topology of percolating pores was determined in both 0°/90° and 0°/45° architectures. At densities greater than 75%, consolidation can be described with percolation theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568288
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    X-ray tomographic microscopy of fibre-reinforced materials (1991)
    Springer
    Journal of materials science 26 (1991), S. 4076-4085 
    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 Aluminium composites containing Al2O3 fibres and precipitates of various intermetallic phases are investigated by high-resolution computerized microtomography. Individual fibres 15 μm in diameter and intermetallic phases forming a network with about 15 μm mesh size have been imaged. The capabilities of the method and its further development down 1 μm and less spatial resolution are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02402949
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    X-ray tomographic microscopy of fibre-reinforced materials (1991)
    Springer
    Journal of materials science 26 (1991), S. 4076-4085 
    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 Aluminium composites containing Al2O3 fibres and precipitates of various intermetallic phases are investigated by high-resolution computerized microtomography. Individual fibres 15 μm in diameter and intermetallic phases forming a network with about 15 μm mesh size have been imaged. The capabilities of the method and its further development down 1 μm and less spatial resolution are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553491
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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