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Träfflista för sökning "WFRF:(Sørensen M) srt2:(1990-1994)"

Search: WFRF:(Sørensen M) > (1990-1994)

  • Result 1-3 of 3
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1.
  • Hustad, J.E., et al. (author)
  • Reactivity measurements of coke particles in five different flow reactors
  • 1990
  • In: Rivista dei Combustibili. - 0370-5463. ; 44:10, s. 257-267
  • Journal article (other academic/artistic)abstract
    • Experiments on reactivity of 128 μm coke particles in the gas temperature range from 1150 K to 1370 K have been performed in five different flow reactors in the Nordic countries and all the results were calculated by the shrinking particle model. The activation energy is found to be 25 kcal/mol indicating combustion control by the combined effects of chemical kinetic and pore diffusion (zone II combustion). The overall apparent reaction order was found to be 1.0
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2.
  • Ion, John, et al. (author)
  • Laser surface modification of a 13.5% Cr, 0.6% C steel
  • 1991
  • In: Journal of Materials Science. - 0022-2461 .- 1573-4803. ; 26:1, s. 43-48
  • Journal article (peer-reviewed)abstract
    • A 13.5% Cr, 0.6% C steel, with an initial microstructure of chromium carbides in a ferrite matrix, was heat-treated by scanning a high-power laser beam over the surface. The aim was to compare the physical and chemical properties produced by this type of selective surface treatment with those resulting from a conventional furnace desensitization and quench-hardening heat treatment. Surface heating homogenized the carbon originally bound in the carbides sufficiently to produce martensite, giving hardening to levels comparable with a conventional heat treatment. Chromium-rich zones, carbides and retained austenite were also detected in the heated microstructure. Surface melting produced complete homogenization of both carbon and chromium, which resulted in the retention of large amounts of austenite in the microstructure on cooling to room temperature. Subsequent refrigeration at - 196 °C transformed some of the austenite to martensite. Pitting corrosion and local reductions in hardness were observed adjacent to treated areas under certain conditions, due to precipitation of secondary carbides and elevated tempering, respectively.
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3.
  • Nyholm, R., et al. (author)
  • The surface core-level shift of the Pd(100) single-crystal surface
  • 1992
  • In: Journal of Physics: Condensed Matter. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 4:1, s. 277-283
  • Journal article (peer-reviewed)abstract
    • The surface core-level shift of the Pd(100) single-crystal surface has been measured from high-resolution Pd 3d core-level spectra. The surface atoms are found to have 0.44+or-0.03 eV lower binding energy than the bulk atoms. The result is compared with theoretical estimates.
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  • Result 1-3 of 3

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