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SIMaP laboratory publishes scientific results in various peer-reviewed international journals. List of those papers and more can be found on the open archive HAL.

Coatings journal front cover: Design of Experiments method: a fountain of Youth for CVD process.

CVD SIMaP (credit F. Mercier)We propose here to revisit a classical CVD process with a design of experiment approach to reveal that main parameters influencing the desired properties of an epitaxial layer, here AlN on sapphire, are not necessarily the one you expect. Simple DOE method can bring new insight into a well-established research and can make you go out of your intuition without any increase in experimental cost !
This work is published in Coatings and is enlighten in the front cover of 2017 September issue

Epitaxial Growth of AlN on (0001) Sapphire: Assessment of HVPE Process by a Design of Experiments Approach,
Raphaël Boichot, Danying Chen, Frédéric Mercier, Francis Baillet, Gaël Giusti, Thomas Coughlan, Mikhail Chubarov and Michel Pons, Coatings 2017, 7(9), 136; doi: Coatings 2017, 7(9), 136; doi:10.3390/coatings7090136

ESRF Spotlight: Fast in-situ nanoimaging of particle sintering

ESRF Spotlight Fast in situ imaging
Neck curvature, a parameter critical to the understanding of sintering, was determined precisely for the first time for the sintering of a glass powder. This was achieved by studying the microstructure evolution during sintering by high-temperature in-situ nanotomography using an unprecedented combination of fast scan time and high resolution. Those results are gathered in a paper in Materials Today journal and are also the subject of a ESRF' SPOTLIGHT ON SCIENCE.

Fast in situ 3D nanoimaging: a new tool for dynamic characterization in materials science, J. Villanova, R. Daudin, P. Lhuissier, D. Jauffrès, S. Lou, C.L. Martin, S. Labouré, R. Tucoulou, G. Martínez-Criado, L. Salvo, Materials Today (2017); doi: 10.1016/j.mattod.2017.06.0

Scientific Reports: From powders to bulk metallic glass composites.

Metallic glass composites
One way to adjust the properties of a material is by changing its microstructure. This concept is not easily applicable on bulk metallic glasses (BMGs), because they do not consist of grains or different phases and so their microstructure is very homogeneous. One obvious way to integrate inhomogeneities is to produce bulk metallic glass composites (BMGCs). Here we show how to generate BMGCs via high-pressure torsion (HPT) starting from powders (amorphous Zr-MG and crystalline Cu). This approach has been developed in partnership with the Erich Schmid Institute of Materials Science in Leoben, Austria, and demonstrated that by changing the applied shear strains, the refinement of the microstructure is adjustable. The refinement of microstructure increases the hardness and a hardness higher than the initial BMG can be obtained.

From powders to bulk metallic glass composites
Lisa Krämer, Yannick Champion, Rienhard Pipan, Scientific Reports (2017)

Written by Sabine Lay

Date of update October 1, 2018

Univ. Grenoble Alpes