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Philippe Buffat

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Publications associées (42)

10th Meeting of the French Microscopy Society - Grenoble 2007

Philippe Buffat

2008

Investigation of particles emitted from modern 2-stroke scooters

Philippe Buffat

Transmission electron microscopy (TEM), combined with X-ray energy dispersive spectroscopy (EDS)—both single and tandem differential mobility analyzer (TDMA)—have been used to investigate particles emitted by two modern 2-stroke scooters with different mix ...

Elsevier2008

Study of new sheep bone and Zn/Ca ratio around TiAlV screw: PIXE-RBS analysis

Philippe Buffat, Danièle Laub

This study reports on in vivo particle induced X-ray emission (PIXE) measurements combined with Rutherford backscattering spectroscopy (RBS) analyses of new remodeled sheep bone formed around TiAIV screws. The implants (screws) were anodized by a modified ...

2008

Preparation, stabilization and characterization of TiO2 on thin polyethylene films (LDPE): Photocatalytic applications

Philippe Buffat, Juan Kiwi, Lioubov Kiwi, Andrzej Kulik, Albert Renken, Danièle Laub, Kyumin Lee

An innovative way to fix preformed nanocrystalline TiO2 on low-density polyethylene film (LDPE-TiO2) is presented. The LDPE-TiO2 film was able to mediate the complete photodiscoloration of Orange II using about seven times less catalyst than a TiO2 suspens ...

2007

Scanning and transmission electron microscopy for evaluation of order/disorder in bone structure

Philippe Buffat, Elena Suvorova Buffat

A comparative characterization of the structure of normal and abnormal (osteoporotic) human lumbar and thoracic vertebrae samples was carried out to reveal the type of possible disorder. Samples from the bone fragments extracted during the surgery due to v ...

2007

Phase analysis of multilayered, nanostructured titanium-base alloys by analytical electron microscopy

Philippe Buffat

Microstructure, chemical and phase composition of the hard layer formed on the Ti-6Al-4V alloy after duplex surface treatment were investigated by light microscopy (LM), X-ray diffraction (XRD) and analytical scanning, transmission and scanning transmissio ...

2007

Erratum to “Preparation, stabilization and characterization of TiO2 on thin polyethylene films (LDPE). Photocatalytic applications"

Philippe Buffat, Juan Kiwi, Lioubov Kiwi, Andrzej Kulik, Albert Renken, Danièle Laub, Kyumin Lee

2007

Alloying effects on microstructure and mechanical properties of high volume fraction SiC-particle reinforced Al-MMCs made by squeeze casting infiltration

Philippe Buffat, Cyril Cayron

The mechanical properties of high volume fraction SiC-particle reinforced Al-based metal matrix composites (MMCs) produced by means of pressurized liquid metal infiltration (squeeze casting) are shown to be triggered by matrix alloying and heat treatment p ...

2007

Analytical transmission electron microscopy and electron diffraction for characterization of multiphase Ni-P-Ti surface layer on Ti-6Al-4V alloy

Philippe Buffat

The microstructure, chemical and phase composition of the hard Ni-P-Ti layer formed on the Ti-6Al-4V alloy after duplex surface treatment were investigated by light microscopy, X-ray diffraction, scanning electron microscopy and analytical/high-resolution ...

2006

Microstructure, properties and biocompatibility of the nitrided Ti-6Al-4V alloy for medical application

Philippe Buffat

Investigation of the microstructure, properties and biocompatibility of the Ti-6Al-4V alloy nitrided under glow discharge was performed. The microstructural analyses were carried out using light microscopy, X-ray diffraction, analytical scanning and transm ...

Trans Tech Publications Ltd.2006

Electron microscopy of biomaterials based on hydroxyapatite

Philippe Buffat, Elena Suvorova Buffat

Three types of biomaterials based on hydroxyapatite are synthesized and investigated. Hydroxyapatite nanocrystals or microcrystals precipitated from low-temperature aqueous solutions serve as the initial material used for preparing spherical porous granule ...

2006

Preparation and structural characterization of thin-film CdTe/CdS heterojunctions

Philippe Buffat, Danièle Laub

The structural characteristics of CdTe/CdS thin-film heterojunctions are investigated. The studied heterojunctions were obtained by successive thermal evaporation under vacuum onto unheated SnO2 coated glass substrates of CdS and CdTe films, respectively. ...

2006

The influence of Ti doping methods on the high field performance of (Nb, Ta, Ti)3Sn multifilamentary wires using Osprey bronze

Philippe Buffat, Marco Cantoni, Davide Uglietti

We have analyzed the influence of the two different Ti doping methods on the superconducting properties of bronze processed (Nb,Ta,Ti)3Sn multifilamentary wires with identical configuration, consisting of a Nb7.5wt.%Ta alloy processed to 14641 filaments of ...

IEEE Institute of Electrical and Electronics Engineers2005

Transmission electron microscopy and atomic force microscopy characterisation of titanium-base alloys nitrided under glow discharge

Philippe Buffat

The microstructure of titanium alloys (Ti–1Al–1Mn, Ti–6Al–4V) nitrided under glow discharge was characterised using light microscopy, X-ray diffraction and analytical electron microscopy. The investigations revealed a complex multilayered microstructure pr ...

2005

Pathological mineralization of cardiac valves: Causes and mechanism

Philippe Buffat, Elena Suvorova Buffat

Objective. Mechanism of calcification of cardiac valves was investigated through a comparative characterization of structure, morphology, and size of hydroxyapatite (HAP) crystals formed in mineral deposit on cardiac valves, bone tissue, and crystals synth ...

2005

Correlation between oxygen transport properties and microstructure in La0.5Sr0.5FeO3-δ

Stefan Diethelm, Philippe Buffat, Jan Van Herle, Joseph Sfeir

The effect of the bulk microstructure (grain size distribution, grain boundary composition on the oxygen transport properties of La0.5Sr0.5FeO3membranes was investigated. For this purpose, samples with different microstruct ...

2005

Microstructure and properties of hard layers formed by duplex surface treatment containing nickel and phosphorus on a titanium-base alloy

Philippe Buffat

Microstructure and chemical composition of the hard Ni–P–Ti layer formed on the Ti–6Al–4V alloy after duplex surface treatment were investigated by light microscopy, X-ray diffraction, scanning electron microscopy and analytical/high resolution transmissio ...

2005

Novel topotactic conversion of an organically templated vanadyl phosphate framework into layered structures

Philippe Buffat

This paper reports a novel topotactic exchange reaction of the ethylenediammonium intercalated mixed-valent vanadyl phosphate, (H3NCH2CH2NH3)0.5[V4+0.45V5+0.55O2PO4{P(OH)2}0.483], with monovalent cations at room temperature. Alkali metal ions and other mon ...

2005

Electron microscopy for investigation of order/disorder in bone structure

Philippe Buffat, Elena Suvorova Buffat

2005

Cross section investigations of compositions and sub-structures of tips obtained by focused electron beam induced deposition

Philippe Buffat, Danièle Laub, Johann Michler, Patrik Willi Hoffmann, Ivo Utke, Christian Santschi, Marco Cantoni

The spatial evolution of compositions and sub-structures inside focused-electron-beam-deposited tips from dicobalt-octacarbonyl Co2(CO)8 precursor at 25 keV and varying beam current (20 pA - 3 A) is extensively studied for the first time by means of energy ...

2005

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