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  • 1
    Digitale Medien
    Digitale Medien
    Synthesis, identification, and growth mechanism of Fe, Ni, and Co crystals encapsulated in multiwalled carbon nanocages (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 4533-4539 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Nanometer size crystalline particles of α-Fe, γ-Fe, Ni, β-Co, and Co3C encapsulated in multiwalled carbon cages are synthesized by a standard dc arc evaporation of composite anodes containing 10–15 wt. % each of the metals or their compounds. The typical particle size is ∼10 nm. Elemental analysis is made by x-ray energy dispersive spectroscopy. The spectra show only the peaks associated with the respective metal and carbon. The stoichiometry and phase of the crystals are assigned from the characteristic lattice spacings obtained by high-resolution transmission electron microscopy and x-ray diffractometry. Particle size distribution is obtained from a statistical survey of electron micrographs. A statistical growth model is adequate for explaining the crystalline particle size distribution of the encapsulated crystals consisting of α-Fe and γ-Fe smaller than 15 nm. Significant deviation from the model is found for the encapsulated crystals consisting of α-Fe and γ-Fe larger than 15 nm, those of Ni larger than 4 nm, and those consisting of β-Co and Co3C larger than 6 nm. The deviation is discussed in terms of encapsulation effect on the particle growth mechanism.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.358446
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  • 2
    Digitale Medien
    Digitale Medien
    Fragmentation of excited molecules and ions in the radiolysis of hydrocarbons
    Amsterdam : Elsevier
    International Journal for Radiation Physics and Chemistry 8 (1976), S. 171-185 
    Details
    ISSN: 0020-7055
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie , Energietechnik , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-7055(76)90064-4
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  • 3
    Digitale Medien
    Digitale Medien
    Galloylhomoarbutin and related polyphenols from Pyrola incarnata
    Amsterdam : Elsevier
    Phytochemistry 28 (1989), S. 607-609 
    Details
    ISSN: 0031-9422
    Schlagwort(e): 2''-O-galloylhyperin ; 6-O-galloylhomoarbutin ; Pyrola incarnata ; Pyrolaceae ; polyphenols ; procyanidins.
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(89)80060-3
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  • 4
    Digitale Medien
    Digitale Medien
    LOW CYCLE FATIGUE CRACK PROPAGATION AT A NOTCH UNDER PULSATING LOAD (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 2 (1979), S. 0 
    Details
    ISSN: 1460-2695
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Maschinenbau
    Notizen: Abstract Fatigue crack propagation tests were carried out under pulsating stress, partly alternating stress and alternating plastic fatigue for Cr- Mo-V steel and mild steel. Although stress and strain intensity factors do not effectively correlate the fatigue crack growth rate over a wide range of stress and strain conditions, a normalized fatigue crack growth rate [(da/dN)/a] is related to the strain range. The fatigue crack propagation behavior at a notch under pulsating load is analyzed with the above relation by considering the cyclic elastic- plastic condition at the notch.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1460-2695.1979.tb01351.x
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  • 5
    Digitale Medien
    Digitale Medien
    ELASTIC–PLASTIC ANALYSIS OF THE FATIGUE LIMIT FOR A MATERIAL WITH SMALL FLAWS (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 1 (1979), S. 0 
    Details
    ISSN: 1460-2695
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Maschinenbau
    Notizen: Abstract Fatigue tests were carried out on mild steel with small cracks for which linear fracture mechanics is not effective. A fatigue limit criterion, based on the cyclic plastic zone size at a crack tip being a material constant at the fatigue limit, can effectively evaluate the effects of crack length and stress ratio. Regarding flaws as cracks, the theory gives fatigue limit values close to those obtained in experiments on specimens with natural defects, such as surface roughness, micro-shrinkage cavities, inclusions etc. The effect of water corrosion was also investigated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1460-2695.1979.tb01334.x
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