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Cécile Hébert

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Microstructural stability of ODS steels in cyclic loading

Cécile Hébert

The remarkable microstructural stability of high chromium steels prepared by powder metallurgy and strengthened by dispersion of nanometric yttrium oxides in cyclic loading at high temperatures is reported. Contrary to the continuous cyclic softening and p ...

Wiley-Blackwell2015

Direct Evidence of Surface Reduction in Monoclinic BiVO4

Cécile Hébert, Daniele Passerone, Rolf Erni, Piyush Agrawal

Local measurements of the oxidation state of vanadium in monoclinic BiVO4 particles by means of electron energy-loss spectroscopy in scanning transmission electron microscopy reveal a pronounced surface reduction: within a 5-nm-thick shell, the oxidation s ...

Amer Chemical Soc2015

Height-resolved quantification of microstructure and texture in polycrystalline thin films using TEM orientation mapping

Cécile Hébert, Duncan Thomas Lindsay Alexander, Arthur Brian Aebersold

A method is presented for the quantitative investigation of microstructure and texture evolution in polycrystalline thin films based on in-plane automated crystal orientation mapping in transmission electron microscopy, from the substrate up. To demonstrat ...

Elsevier Science Bv2015

Gentle quantitative measurement of helium density in nanobubbles in silicon by spectrum imaging

Cécile Hébert, Duncan Thomas Lindsay Alexander, Guillaume Lucas

We propose an original method for the determination of the physical properties of nanometer sized helium bubbles using spectrum imaging in an energy-filtered transmission electron microscope. Helium bubbles synthesized by high fluence implantation and ther ...

Pergamon-Elsevier Science Ltd2015

Direct visualization of dispersed lipid bicontinuous cubic phases by cryo-electron tomography

Cécile Hébert, Davide Demurtas, Paul Guichard, Raffaele Mezzenga

Bulk and dispersed cubic liquid crystalline phases (cubosomes), present in the body and in living cell membranes, are believed to play an essential role in biological phenomena. Moreover, their biocompatibility is attractive for nutrient or drug delivery s ...

Nature Publishing Group2015

Toward Knowledge-Based Grain-Boundary Engineering of Transparent Alumina Combining Advanced TEM and Atomistic Modeling

Paul Bowen, Cécile Hébert, Marco Cantoni, Michael Stuer, Farhang Nabiei, Abhishek Tewari

Transition element dopants (e.g., Y, La) are commonly used as sintering aids in polycrystalline alumina ceramics, which segregate to the grain boundaries and control the grain-boundary mobility. However, due to the extremely thin (

Wiley-Blackwell2015

Measurements of local chemistry and structure in Ni(O)-YSZ composites during reduction using energy-filtered environmental TEM

Jan Van Herle, Quentin Thomas Jeangros, Cécile Hébert, Aïcha Hessler-Wyser

Energy-filtered transmission electron microscopy images are acquired during the reduction of a NiO-YSZ composite in H-2 up to 600 degrees C. Temperature-resolved quantitative information about both chemistry and structure is extracted with nm spatial resol ...

Royal Society of Chemistry2014

Oxidation mechanism of nickel particles studied in an environmental transmission electron microscope

Jan Van Herle, Cécile Hébert, Aïcha Hessler-Wyser, Quentin Thomas Jeangros

The oxidation of nickel particles was studied in situ in an environmental transmission electron microscope in 3.2 mbar of O-2 between ambient temperature and 600 degrees C. Several different transmission electron microscopy imaging techniques, electron dif ...

Pergamon-Elsevier Science Ltd2014

Optimization of the Data Acquisition and Processing using a Prior Knowledge of the Camera Characteristics: an EFTEM Case Study

Guillaume Lucas, Cécile Hébert

Cambridge, Cambridge University Press2014

Enhanced Quantification for 3D Energy Dispersive Spectrometry: Going Beyond the Limitation of Large Volume of X-Ray Emission

Cécile Hébert, Marco Cantoni, Pierre Burdet

This paper presents a method developed to quantify three-dimensional energy dispersive spectrometry (3D EDS) data with voxel size smaller than the volume from which X-rays are emitted. The influence of the neighboring voxels is corrected by applying recurs ...

Cambridge University Press2014

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