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- W1975982022 abstract "Abstract This work analyses the microstructure changes of various copper-based powder systems during sintering from 3D images provided by in situ synchrotron microtomography. The investigated systems include a copper powder with a wide particle size distribution of 0–63 µm poured into a quartz capillary, a pre-sintered copper compact with artificially created large pores and a mixture of copper and alumina particles. The experiments were carried out at the European Synchrotron in Grenoble, France. Powders were sintered up to 1060°C under reducing atmosphere in a furnace located between the X-ray source and the detector. During each experiment, 3D images were taken at various times of the thermal cycle. We have obtained images with a resolution of 1.5 µm and the time of acquisition of every image was ∼1 min. Quantitative analysis of these images allowed the changes of various important parameters to be followed. Such parameters characterise the sintering process at the particle length scale: interparticle coordination, pore size distribution and particle centre-to-centre distance. Moreover, by tracking the displacement of each particle centre and comparing it to the displacement predicted by classical mean field assumption, we have been able to assess the magnitude of particle rearrangement occurring during sintering. From these data, the sintering behaviour of heterogeneous powder systems is discussed with particular emphasis of collective particle phenomena. Keywords: sinteringX-ray microtomographycompositesporosity" @default.
- W1975982022 created "2016-06-24" @default.
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- W1975982022 date "2009-11-11" @default.
- W1975982022 modified "2023-10-10" @default.
- W1975982022 title "Analysing the sintering of heterogeneous powder structures by<i>in situ</i>microtomography" @default.
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- W1975982022 doi "https://doi.org/10.1080/14786430903150225" @default.
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