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Université de Fribourg

XRCT characterisation of Ti particles inside porous Al₂O₃

Vasić, Srdan ; Grobéty, Bernard ; Kuebler, Jakob ; Graule, Thomas ; Baumgartner, Lukas

In: Materials Characterization, 2010, vol. 61, no. 6, p. 653-660

Computed X-ray tomography was used to characterise distribution and sphericity of Ti granules within highly porous (> 35%) Al₂O₃ powder compacts, as they are key parameters for a successful infiltration by Fe-based alloys. Setting of reconstruction constraints, image editing as well as data processing are the most challenging parts of computed X-ray tomography and principal sources of errors...

Université de Fribourg

X-ray computed micro tomography as complementary method for the characterization of activated porous ceramic preforms

Vasic, Srdan ; Grobéty, Bernard ; Kuebler, J. ; Graule, T. ; Baumgartner, Lukas P.

In: Journal of Materials Research, 2007, vol. 22, no. 5, p. 1414-1424

X-ray computed micro tomography (CT) is an alternative technique to the classical methods such as mercury intrusion (MIP) and gas pycnometry (HP) to obtain the porosity, pore-size distribution, and density of porous materials. Besides the advantage of being a nondestructive method, it gives not only bulk properties, but also spatially resolved information. In the present work, uniaxially pressed...

Consortium of Swiss Academic Libraries

Xanthines as a scaffold for molecular diversity

Heizmann, Gerhard ; Eberle, Alex

In: Molecular Diversity, 1997, vol. 2, no. 3, p. 171-174

Université de Fribourg

White earthenware from Lorraine (1755 –c. 1820): provenance and technique

Maggetti, Marino ; Rosen, J. ; Serneels, Vincent

In: Archaeometry, 2011, vol. 53, no. 4, p. 765–790

Fragments of 25 examples of ‘white earthenware’ from Lorraine were subjected to porosity analysis, X-ray fluorescence analysis, X-ray diffraction analysis and backscattered-electron image analysis—coupled with energy-dispersive spectrometry to determine the porosity, bulk, major, minor and trace element compositions, and the composition and the proportion of their constituent...

Consortium of Swiss Academic Libraries

What is behind the plastic strain rate?

Hütter, Markus ; Grmela, Miroslav ; Öttinger, Hans

In: Rheologica Acta, 2009, vol. 48, no. 7, p. 769-778