Search Results - "Le Caer, G"

Mechanosynthesis of supersaturated solid solutions of Sn in near-equiatomic bcc FeCo by Loureiro, J.M., Costa, B.F.O., Le Caër, G.

“…► (Fe50−x/2Co50−x/2)Snx mixtures are mechanically alloyed for x≤33at.%. ► As-ground powders are studied by X-ray diffraction and 57Fe and 119Sn Mössbauer…”
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Mechanically activated solid-state synthesis of hafnium carbide and hafnium nitride nanoparticles by Barraud, E., Bégin-Colin, S., Le Caër, G., Barres, O., Villieras, F.

“…Nanocrystalline hafnium nitrides and hafnium carbides are synthesized, from powder mixtures based on partially hydrated hafnium tetrachloride, ph-HfCl 4, and…”
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Heterogeneous dynamics of a granular pack under vertical tapping by Kiesgen de Richter, S, Le Caër, G, Delannay, R

“…The dynamics of a tri-dimensional dense granular packing under gravity and vertical tapping is numerically investigated in a stationary state. A slowing-down…”
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Thermal decomposition of HfCl4 as a function of its hydration state by BARRAUD, E, BEGIN-COLIN, S, LE CAËR, G, VILLIERAS, F, BARRES, O

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Mechanically induced phase transformations of the sigma phase of nanograined and of coarse-grained near-equiatomic FeCr alloys by Costa, B.F.O., Le Caër, G., Loureiro, J.M., Amaral, V.S.

“…A coarse-grained tetragonal sigma phase σ-Fe 0.54Cr 0.46, prepared from an as-cast alloy, and a nanocrystalline σ-Fe 0.52Cr 0.48 phase were ball-milled in…”
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B2 long-range order in mechanically alloyed Fe53.3−0.6xCo46.7−0.4xSnx (2 ≤ x ≤ 26) annealed at moderate temperatures by Malaman, B., Le Caër, G., Costa, B. F. O.

“…Recent interest in Fe–Co–Sn alloys stems from Heusler alloys. A Co 2 FeSn Heusler alloy is found to be unstable relative to other phases from ab initio…”
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Mössbauer spectrometry of near equiatomic Fe–Cr alloys: Influence of preparation method by Delcroix, P., Le Caër, G., Costa, B.F.O.

“…Mössbauer spectra reflect the strong sensitivity of the distribution of hyperfine magnetic field distributions (HMFDs) of near equiatomic Fe–Cr alloys to the…”
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Mössbauer spectrometry of near equiatomic Fe–Cr alloys: Phase separation at high temperature? by Le Caër, G., Delcroix, P., Costa, B.F.O.

“…Mössbauer spectrometry shows that a bulk bcc Fe 0.51Cr 0.49 alloy annealed between 1000 and 1200 °C and quenched at ambient temperature is not phase-separated…”
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Partial amorphization of an α-FeCr alloy by ball-milling by Loureiro, J. M., Costa, B. F. O., Caër, G. Le, Delcroix, P.

“…The structural changes of near-equiatomic α -FeCr alloys, ground in a vibratory mill in vacuum and in argon, were followed as a function of milling time. An…”
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Ball-milling in vacuum of α and σ phases of near-equiatomic FeCr alloys by Costa, B.F.O., Le Caër, G., Loureiro, J.M.

“…The structural changes induced by ball-milling of near-equiatomic σ-FeCr and α-FeCr in vacuum were followed. Besides the α-phase, an amorphous phase appears…”
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Mechanosynthesis of bcc alloys from Fe50−y/2Co50−y/2Sny mixtures (2 ≤ y ≤ 33) and B2 ordering by annealing at modest temperatures by Costa, B. F. O., Malaman, B., Caër, G. Le, Gordo, P. M., Ramalho, A.

“…Elemental powder mixtures of Fe, Co and Sn of initial compositions Fe 50−y/2 Co 50−y/2 Sn y (2 ≤y ≤ 26) are ball-milled at high-energy. They yield metastable…”
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Nearest-neighbour spacing distributions of the β-Hermite ensemble of random matrices by Le Caër, G., Male, C., Delannay, R.

“…The evolution with β of the distributions of the spacing ‘ s’ between nearest-neighbour levels of unfolded spectra of random matrices from the β-Hermite…”
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Phase transformations of σ-FeCr induced by ball milling by Costa, B. F. O., Loureiro, J. M., Le Caër, G.

“…A tetragonal sigma phase σ-Fe0.54Cr0.46 transforms gradually into a bcc phase by ball-milling in argon. Mössbauer spectroscopy shows further the presence of an…”
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Neutron powder diffraction and Mössbauer spectroscopy ( 119 Sn and 155 Gd ) studies of the CeScSi-type GdMgSn and GdMgPb compounds by Lemoine, P., Lee-Hone, N. R., Ryan, D. H., Vernière, A., Malaman, B., Le Caër, G.

“…The magnetic structures of the CeScSi-type GdMgSn and GdMgPb compounds have been studied by both neutron powder diffraction and Mössbauer spectroscopy (119Sn…”
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Magnetic and transport studies of σ-phase Fe50V50 alloys with different thermal history by COSTA, B. F. O, AMARAL, V. S, LE CAËR, G, BRAGA, M. E, AMADO, M. M, ROCCO, D. L, SOUSA, J. B

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Alumina-alloy nanocomposite powders by mechanosynthesis by OSSO, D, TILLEMENT, O, LE CAER, G, MOCELLIN, A

“…Mossbauer spectroscopy and X-ray diffraction were used to investigate the synthesis of nanocomposite powders by reactive milling of a variety of blends of…”
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Calculating the distribution of transferred hyperfine fields at the Sn site in tetragonal CeScSi-type RMgSn compounds by Lee-Hone, N. R., Lemoine, P., Ryan, D. H., Malaman, B., Vernière, A., Le Caër, G.

“…We present a simple model based on an isotropic transferred hyperfine field to calculate the transferred hyperfine field distribution at the Sn site of the…”
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On some natural and model 2D bimodal random cellular structures by PARFAIT-PIGNOL, V, LE CAËR, G, DELANNAY, R

“…The topological and metric properties of a few natural 2D random cellular structures, namely an armadillo shell structure and young soap froths, which are…”
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Kinetics of the sigma-to-alpha phase transformation caused by ball milling in near equiatomic Fe − Cr alloys by Cieślak, J., Costa, B. F. O., Dubiel, S. M., Le Caër, G.

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Kinetics and Mechanisms of Phase Transformations Induced by Ball-Milling in Anatase TiO2 by Bégin-Colin, S., Girot, T., Le Caër, G., Mocellin, A.

“…Ball-milling is a way of inducing phase transformations, chemical reactions, and changes in the reactivity of solids. It is a complex process for which several…”
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