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  • microstructure  (4)
  • Springer  (4)
  • 2000-2004  (1)
  • 1995-1999  (2)
  • 1990-1994  (1)
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Keywords
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  • Springer  (4)
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  • 2000-2004  (1)
  • 1995-1999  (2)
  • 1990-1994  (1)
Year
  • 1
    Electronic Resource
    Electronic Resource
    High-Pressure Processing and Characterization of Fe–High-C/N Alloys (1998)
    Springer
    Journal of materials synthesis and processing 6 (1998), S. 147-154 
    Details
    ISSN: 1573-4870
    Keywords: High-pressure melting ; iron–carbon–nitrogen steels ; microstructure ; compression strength
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new process has been developed that results in (i) enhanced nitrogen addition to ferritic iron–carbon alloys and (ii) melt-casting in a single operation. This new processing technique enables Fe–C alloys to retain high nitrogen interstitial concentrations and to reduce significantly, and possibly eliminate, carbide formation. In this study two commercial-grade, steel alloys were cast under elevated nitrogen pressures, resulting in solid solution (austenite, ferrite, and martensite) high-carbon and high-nitrogen iron alloys that were, within detection limits, carbide- and nitride-free. These alloys were subsequently thermally processed to transform part of the retained austenite to martensite. The microstructure and mechanical properties of the alloys were studied as a function of carbon and nitrogen composition and as a function of thermal processing. The retain high nitrogen concentrations in these cast and processed iron–carbon alloys resulted in a substantial improvement in compression strengths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022651620806
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation, Microstructure and Photocatalytic Activity of the Porous TiO2 Anatase Coating by Sol-Gel Processing (2000)
    Springer
    Journal of sol gel science and technology 17 (2000), S. 163-171 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel processing ; porous titania coatings ; microstructure ; photocatalytic degradation ; organophosphorous insecticide ; sunlight
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In this study the porous TiO2 anatase coatings are prepared from alkoxide solutions containing polyethylene glycol (PEG) by a dip-coating technique. The effects of PEG addition to the precursor solution on the photocatalytic activity and microstructure of the resultant coatings are studied. The larger amount and the larger molecular weight of PEG, the larger size and more pores produced in the resultant coatings on the decomposition of PEG during heat-treatment. The adsorbed hydroxyl content of such porous coatings is found to increase due to the larger size and more pores in the coatings. However, the transmittance of the coatings decreases due to the scattering by the larger size and more pores. Photocatalytic degradation experiments show that organophosphorous insecticide, dimethyl-2,2-dichlorovinyl phosphate (DDVP), was efficiently degraded in the presence of the porous TiO2 coatings by exposing the DDVP solution to sunlight. Photocatalytic degradation rate was related to the adsorbed hydroxyl content, transmittance and morphology of the resultant coatings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008703719929
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  • 3
    Electronic Resource
    Electronic Resource
    Effective elastic moduli of an inhomogeneous medium with cracks (1995)
    Springer
    Acta mechanica Sinica 11 (1995), S. 153-161 
    Details
    ISSN: 1614-3116
    Keywords: microcrack ; microstructure ; interaction between cracks ; effective elastic moduli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In the present paper, the effective elastic moduli of an inhomogeneous medium with cracks are derived and obtained by taking into account its microstructural properties which involve the shape, size and distribution of cracks and the interaction between cracks. Numerical results for the periodic microstructure of different dimensions are presented. From the results obtained, it can be found that the distribution of cracks has a significant effect on the effective elastic moduli of the material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02487623
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  • 4
    Electronic Resource
    Electronic Resource
    Prediction of the overall moduli of a cylindrical short-fiber reinforced composite (1993)
    Springer
    Acta mechanica Sinica 9 (1993), S. 53-60 
    Details
    ISSN: 1614-3116
    Keywords: microstructure ; cylindrical inclusion ; effective elastic moduli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract With respect to obtaining the effective elastic moduli of the composite, the present theory differs from both Eshelby's equivalent inclusion method and Hill's self-consistent one, both of which only consider the mechanical properties of the matrix and inclusions (fibers). In fact, the inclusion-inclusion interaction is more pronounced when the volume fraction of inclusions of the composite increases. Hence, in this paper the effective elastic moduli of the composite are derived by taking into account the shapes, sizes and distribution of inclusions, and the interactions between inclusions. In addition, it is more convincing to assume short-fibers as cylindrical inclusions as in the present paper than as ellipsoidal ones as in others[7,8]. Finally, numerical results are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02489162
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