Papers by Author: Jérémie De Baerdemaeker

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Authors: Jérémie De Baerdemaeker, Charles Dauwe, Danny Segers, Christophe Detavernier, D. Deduytsche, W. Egger, Peter Sperr
Authors: Jérémie De Baerdemaeker, N. Balcaen, Charles Dauwe
Authors: Rajashekhara Shabadi, Roland Taillard, Bertrand Radiguet, Jérémie De Baerdemaeker, Elke Leunis
Abstract: Effect of the third alloying element Mn on Cu-precipitation was studied in a binary Fe-1.3% Cu alloy. Precipitation in both the alloys was investigated after homogenization treatment and subsequent artificial aging. Advanced characterization techniques such as Positron Annihilation Spectroscopy (PAS) and Tomographic Atom Probe (TAP) were used to establish the chemical composition, morphology, size and number density of the Cu-rich phases. Combined results of PAS and TAP were particularly useful in order to follow the Cu precipitation in the binary alloy. At short aging times, addition of Mn significantly increased the kinetics of hardening while its effect on the magnitude of precipitation strengthening is only marginal. It further increases the over-aging kinetics.
Authors: Jérémie De Baerdemaeker, T. van Hoecke, S. van Petegem, Danny Segers, W. Bauer-Kugelmann, Peter Sperr, G. Terwagne
Authors: Carlos A. Palacio, Jérémie De Baerdemaeker, Danny Segers, Khaled M. Mostafa, Dries Van Thourhout, Charles Dauwe
Abstract: Positron transmission experiments were performed on free-standing poly(methyl-methacrylate) (PMMA) and polystyrene (PS) films of nanometric thicknesses made by spin coating. The power_law equation z1/2(E) )=(α/ρ)En was determined from the measurements of the S-parameter as a function of the positron implantation energy. These transmission experiments indicate that n = 1.90(±0.08) and α = 1.33(±0.10) μg cm-2 which deviates from the values found by Algers et al. (n = 1.71(±0.05) and α = 2.8(±0.2) μg cm-2) and the commonly used parameters (n = 1.6 and α = 4.0 μg cm-2).
Authors: Nicolas Laforest, Jérémie De Baerdemaeker, Corine Bas, Charles Dauwe
Abstract: Positron annihilation lifetime measurements on polymethylmethacrylate (PMMA) at low temperature were performed. Different discrete fitting procedures have been used to analyze the experimental data. It shows that the extracted parameters depend strongly on the fitting procedure. The physical meaning of the results is discussed. The blob model seems to give the best annihilation parameters.
Authors: Charles Dauwe, B. van Waeyenberge, Jérémie De Baerdemaeker
Authors: N. Balcaen, Charles Dauwe, B. van Waeyenberge, Jérémie De Baerdemaeker
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