This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-01-25 Creation time: 03-18-29 --- Number of references 50 article ISI:000315834800005 ISIJ INTERNATIONAL 2013 53 2 213-220 The present study aims to understand the melting of the consumable electrode in the VAR process and gain some insight into the influence of an ensemble arc motion on the melting behaviour. In a previous study, a 2D axisymmetric model of the heat transfer in the cathode had been developed. Using the operating parameters as model inputs, it enabled prediction of the melt rate and the evolution of the melting area. Model results were successfully compared to melt rate measurements in an industrial VAR furnace. In recent years, it has been claimed that the electric arc may not be considered as steady and axisymmetric. Our experimental investigation of the luminosity recorded during an actual VAR heat confirms that a transient 3D behaviour may take place. Therefore, a 3D version of the previous model was set up to predict the heat transfer and melting of the electrode, using the unknown ensemble arc motion as an input. The arc is assimilated to a transient distribution of energy flux density. Results evidence that the influence of the arc motion on the shape of the electrode tip can be very important. In industrial practice, the cathode tip usually remains relatively flat during melting. The shapes of the computed electrode tips enable us to propose some arc parameters which remain compatible with both the periodic behaviour of the light emitted and the flatness of the electrode. Centre de Compétences : ERMIONE informatique et calcul 0915-1559 10.2355/isijinternational.53.213 AlainJardy PierreChapelle AshishMalik Jean-PierreBellot HerveCombeau BernardDussoubs article ISI:000324827200023 JOURNAL OF APPLIED PHYSICS 2013 114 Centre de Compétences : X-Gamma rayons X et spectroscopie 0021-8979 10.1063/1.4821884 F.Capon A.BOILEAU C.Carteret N.Martin P.Boulet J. F.Pierson article Rougemaille2013 New Journal of Physics 2013 15 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84875826422&partnerID=40&md5=b49f7aed36833edb847643b698afd109 N.Rougemaille F.Montaigne B.Canals M.Hehn H.Riahi D.Lacour J.-C.Toussaint article ISI:000324049000004 PHYSICAL REVIEW B 2013 88 12 Département P2M : Surfaces et Spectroscopies 1098-0121 10.1103/PhysRevB.88.125113 R.Cortes A.Tejeda J.Lobo-Checa C.Didiot B.Kierren D.Malterre J.Merino F.Flores E. G.Michel A.Mascaraque article Pushkareva:2013 ISIJ International 2013 53 1215-1223 Département SI2M : Microstructures et Contraintes 10.2355/isijinternational.53.1215 I.Pushkareva C.Scott M.Goune N.Valle A.Redjaïmia AMoulin article ISI:000325342500026 2013 8626 Centre de Compétences : X-Gamma rayons X et spectroscopie Teherani, FH and Look, DC and Rogers, DJ 0277-786X 10.1117/12.2010105 SamuelMargueron AusrineBartasyte ValentinaPlausinaitiene AdulfasAbrutis PascalBoulet VirgaudasKubilius ZitaSaltyte article ISI:000329462800004 SYMMETRY-BASEL 2013 5 4 344-354 Département P2M : Surfaces et Spectroscopies 2073-8994 10.3390/sym5040344 GuillaumeVasseur YannickFagot-Revurat BertrandKierren MurielSicot DanielMalterre article 201-3774 Surface and Coatings Technology 2013 221 70 The plasma electrolytic oxidation (PEO) of aluminium alloys is investigated for different electrical working conditions using a pulsed bipolar current supply. A particular attention is paid to the effect of the anodic current density (from 10 to 90 A dm-2) and current pulse frequency (from 100 to 900 Hz) on the resulting oxide layer. Micro-discharges are characterized during the process by means of fast video imaging with a time and a space resolution of 8 μs and 0.017 mm2, respectively. Correlations are established between themicro-discharge characteristics (surface density, lifetime and size) and the elaborated oxide layers (morphology, growth rate and surface roughness). The highest coating growth rate measured (2.1 μm min-1) is achieved with the combination of the highest current density (75.7 A dm-2) and the highest current pulse frequency (900 Hz). Within these specific current conditions it is concluded that the detrimental effects of numerous micro-discharges are minimized. The results also show that the surface roughness may be largely affected by the presence of long-lived and large micro-discharges which develop over the processed surface. The strongest micro-discharges (live duration up to 0.3 ms and cross-sectional area up to 1 mm2) are mainly observed with the combination of the highest current density (75.7 A dm-2) and the lowest current pulse frequency (100 Hz). Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1016/j.surfcoat.2013.01.029 J.Martin A.Melhem I.Shchedrina T.Duchanoy A.Nominé G.Henrion T.Czerwiec T.Belmonte article ISI:000315145900017 PHYSICAL REVIEW B 2013 87 7 Département P2M : Surfaces et Spectroscopies 1098-0121 10.1103/PhysRevB.87.075427 C.Tournier-Colletta B.Kierren Y.Fagot-Revurat D.Malterre article Riahi2013 Journal of Physics Condensed Matter 2013 25 29 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84879863892&partnerID=40&md5=25ddf2bb32fe24df35ebe11a5e02b47d H.Riahi F.Montaigne N.Rougemaille B.Canals D.Lacour M.Hehn article Melchior2013 Physical Review B - Condensed Matter and Materials Physics 2013 88 10 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84884866863&partnerID=40&md5=2a0167f587bb7ba10893fc9a287dca61 P.Melchior M.Rollinger P.Thielen S.Alebrand U.Bierbrauer C.Schneider M.Gottwald M.Hehn S.Mangin M.Cinchetti M.Aeschlimann article Riahi2013 Journal of Physics Condensed Matter 2013 25 33 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84881184641&partnerID=40&md5=4cbba560a1dcc83ef2f7e5a35268c004 H.Riahi F.Montaigne N.Rougemaille B.Canals D.Lacour M.Hehn article 201-3791 Contributions to Plasma Physics 2013 53 459-468 This work presents the physics design for a simple quasi-axially symmetric stellarator. A plasma configuration described by a modest number of Fourier coefficients was found to establish this symmetry with good accuracy. The low rotational transform results in a relatively simple coil set exhibiting low curvatures and comfortable clearance between adjacent coils. As another consequence, the maximum achievable plasma pressure will be limited to about 0.5%. An experiment along the lines proposed would allow an exploration of the confinement properties of a quasi-axially symmetric configuration. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1002/ctpp.201200055 M.Drevlak F.Brochard P.Helander J.Kisslinger M.Mikhailov C.Nührenberg J.Nührenberg Y.Turkin article ISI:000318556100019 JOURNAL OF PHYSICS-CONDENSED MATTER 2013 25 Centre de Compétences : X-Gamma rayons X et spectroscopie 0953-8984 10.1088/0953-8984/25/20/205901 AusrineBartasyte ValentinaPlausinaitiene AdulfasAbrutis SandraStanionyte SamuelMargueron PascalBoulet T.Kobata YoshiakiUesu JeromeGleize article 201-2769 Journal of Applied Physics 2013 113 043301 Modes of energy dissipation in impacts made on various materials (Al, Cu, Fe, and Si) by discharges in heptane are investigated for micro-gap conditions. Bulk metals and thin films of 300 nm in thickness deposited on silicon wafers are used as samples. Positive high voltage pulses with nanosecond rise times make it possible to isolate a single discharge and to study the way the charge delivered by the power supply is transferred to the larger electrode (the sample) in a pin-to-plate configuration. The diameter of the impacts created by the plasma varies linearly versus the charge raised at a power close to 0.5. However, the exact value of the power depends on the material. We also show how the impact morphologies change with the applied charge. At high charges, the diameters of impacts on thin films behave as those made on silicon. At low charges, they behave as the bulk material. Finally, we show that the energy dissipated in impacts is below a few percent. Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1063/1.4780786 A.Hamdan J.-N.Audinot S.Migot-Choux C. Noël G.Henrion T.Belmonte article Geandier:2013 Materials Science Forum 2013 768-769 313-320 Département SI2M : Microstructures et Contraintes 10.4028/www.scientific.net/MSF.768-769.313 G.Geandier M.Dehmas M.Mourot E.Aeby-Gautier S.Denis O.Martin N.Karnatak article Devynck:2013 Key Engineering Materials 2013 554--557 1530--1538 Département SI2M : Microstructures et Contraintes 10.4028/www.scientific.net/KEM.554-557.1530 S.Devynck M.Gradeck J.P.Bellot S.Denis G.Maigrat M.Varlez T.Benard article ISI:000330016900081 ACS NANO 2013 7 9 8190-8198 Département P2M : Surfaces et Spectroscopies 1936-0851 10.1021/nn4035684 MarcoDi Giovannantonio MohamedEl Garah JoshLipton-Duffin VincentMeunier LuisCardenas Yannick FagotRevurat AlbanoCossaro AlbertoVerdini Dmitrii F.Perepichka FedericoRosei GiorgioContini article ISI:000325367100003 ADVANCED ENGINEERING MATERIALS 2013 15 10 885-892 Discharges in heptane in pin-to-plate configuration are produced between a platinum wire and a (100)-oriented silicon wafer coated by a carbon nanotube (CNT) carpet. This carpet is used to simulate the behavior of a nanostructured surface in electro-discharge machining (EDM) where small protrusions on the surface could play a similar role. CNTs behave like simple electrical conductors between the discharge and the silicon wafer. They act as if they would focus the current on smaller areas. The average diameter of impacts is about five times smaller if the silicon wafer is coated by a CNT carpet. The underlying silicon surface is heated by the plasma and melts, forming a central spot surrounded by a serrated trailing edge. The current density being about one order of magnitude larger when a CNT carpet is present, the induced magnetic field stirs the molten silicon, creating serrations all around the impact. Hot nanoparticles of carbon coming from the plasma fall and roll randomly on the silicon surface where they create wavy micro-channels. Nanowires that are detached from the surface are covered by nanoparticles of platinum in the plasma and embedded within an amorphous carbon layer deposited on the nanotube. However, these effects can only be observed if the current density is high enough (>approximate to 10A mu m(-2) depending on the material) like in micro-EDM but not in nano-EDM. Hamdan, A (Reprint Author), Univ Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54042 Nancy, France. Hamdan, Ahmad; Migot-Choux, Sylvie; Noel, Cedric; Kosior, Francis; Henrion, Gerard; Belmonte, Thierry, Univ Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54042 Nancy, France. Audinot, Jean-Nicolas, Ctr Rech Publ Gabriel Lippmann, SAM Dept, L-4422 Belvaux, Luxembourg. Centre de Compétences : ERMIONE informatique et calcul WILEY-V C H VERLAG GMBH

BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY

Article English 1438-1656 10.1002/adem.201300106 AhmadHamdan Jean-NicolasAudinot SylvieMigot-Choux CedricNoel FrancisKosior GerardHenrion ThierryBelmonte article 201-3777 Advanced Engineering Materials 2013 15 885-892 Discharges in heptane in pin-to-plate configuration are produced between a platinum wire and a (100)-oriented silicon wafer coated by a carbon nanotube (CNT) carpet. This carpet is used to simulate the behavior of a nanostructured surface in electro-discharge machining (EDM) where small protrusions on the surface could play a similar role. CNTs behave like simple electrical conductors between the discharge and the silicon wafer. They act as if they would focus the current on smaller areas. The average diameter of impacts is about five times smaller if the silicon wafer is coated by a CNT carpet. The underlying silicon surface is heated by the plasma and melts, forming a central spot surrounded by a serrated trailing edge. The current density being about one order of magnitude larger when a CNT carpet is present, the induced magnetic field stirs the molten silicon, creating serrations all around the impact. Hot nanoparticles of carbon coming from the plasma fall and roll randomly on the silicon surface where they create wavy micro-channels. Nanowires that are detached from the surface are covered by nanoparticles of platinum in the plasma and embedded within an amorphous carbon layer deposited on the nanotube. However, these effects can only be observed if the current density is high enough (>approximate to 10A mu m(-2) depending on the material) like in micro-EDM but not in nano-EDM. Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1002/adem.201300106 A.Hamdan J.-N.Audinot S.Migot-Choux C.Noel F.Kosior G.Henrion T.Belmonte article Lu2013 Applied Physics Letters 2013 103 2 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84880475078&partnerID=40&md5=b00d9fdada7fce71fc7dc6fbe33054c7 Y.Lu D.Lacour G.Lengaigne S.Le Gall S.Suire F.Montaigne M.Hehn article Lu2013 Applied Physics Letters 2013 103 2 Centre de Compétences : MiNaLor micro et nanotechnologies http://www.scopus.com/inward/record.url?eid=2-s2.0-84880475078&partnerID=40&md5=b00d9fdada7fce71fc7dc6fbe33054c7 Y.Lu D.Lacour G.Lengaigne S.Le Gall S.Suire F.Montaigne M.Hehn article Briones2013 Applied Physics Letters 2013 103 7 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84882394652&partnerID=40&md5=12fb71b0f8a8a9bb4ea68d662d561136 J.Briones P.Toro A.Encinas L.Caballero J.C.Denardin F.Melo E.Cerda S.Robert D.Lacour F.Montaigne article ISI:000323769000050 APPLIED PHYSICS LETTERS 2013 103 Centre de Compétences : X-Gamma rayons X et spectroscopie 0003-6951 10.1063/1.4818677 J.Briones P.Toro A.Encinas L.Caballero J. C.Denardin F.Melo E.Cerda S.Robert D.Lacour F.Montaigne article Rajanikanth2013 Applied Physics Letters 2013 103 6 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84881658211&partnerID=40&md5=fad5a7487bea9bafd8dc17dfe913b5c7 A.Rajanikanth T.Hauet F.Montaigne S.Mangin S.Andrieu article Rajanikanth2013 Applied Physics Letters 2013 103 6 Centre de Compétences : MiNaLor micro et nanotechnologies http://www.scopus.com/inward/record.url?eid=2-s2.0-84881658211&partnerID=40&md5=fad5a7487bea9bafd8dc17dfe913b5c7 A.Rajanikanth T.Hauet F.Montaigne S.Mangin S.Andrieu article 201-4379 Matériaux et Techniques 2013 101 204 Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1051/mattech/2013064 M.Keddam G.Marcos T.Thiriet T.Czerwiec H.Michel article ISI:000319568800008 JOURNAL OF PHYSICS D-APPLIED PHYSICS 2013 46 Centre de Compétences : X-Gamma rayons X et spectroscopie 0022-3727 10.1088/0022-3727/46/23/235107 W.Chamorro D.Horwat P.Pigeat P.Miska S.Migot F.SOLDERA P.Boulet F.MUECKLICH article ISI:000314881900006 APPLIED SURFACE SCIENCE 2013 267 21-25 Département P2M : Surfaces et Spectroscopies 0169-4332 10.1016/j.apsusc.2012.04.150 B. V.Andryushechkin V. V.Cherkez E. V.Gladchenko G. M.Zhidomirov B.Kierren Y.Fagot-Revurat D.Malterre K. N.Eltsov article ISI:000323715500007 PHYSICAL REVIEW LETTERS 2013 111 9 Département P2M : Surfaces et Spectroscopies 0031-9007 10.1103/PhysRevLett.111.096402 T.Mazet D.Malterre M.FRANÃ?OIS C.Dallera M.Grioni G.Monaco article Sukhostavets2013 Physical Review Letters 2013 111 24 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84890287937&partnerID=40&md5=cdbe7fcb95123b33be42e3008f59b4e2 O.V.Sukhostavets B.Pigeau S.Sangiao G.De Loubens V.V.Naletov O.Klein K.Mitsuzuka S.Andrieu F.Montaigne K.Y.Guslienko article Sukhostavets2013 Physical Review Letters 2013 111 24 Centre de Compétences : MiNaLor micro et nanotechnologies http://www.scopus.com/inward/record.url?eid=2-s2.0-84890287937&partnerID=40&md5=cdbe7fcb95123b33be42e3008f59b4e2 O.V.Sukhostavets B.Pigeau S.Sangiao G.De Loubens V.V.Naletov O.Klein K.Mitsuzuka S.Andrieu F.Montaigne K.Y.Guslienko article Lambert2013 Applied Physics Letters 2013 102 12 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84875938232&partnerID=40&md5=34c92e2f1215b6fdf8bb1dcac1ffa5b7 C.-H.Lambert A.Rajanikanth T.Hauet S.Mangin E.E.Fullerton S.Andrieu article 201-4180 Journal of Raman Spectroscopy 2013 44 5 776-784 Micro-Raman spectroscopy was used to investigate the main deformation micromechanisms of isotactic polypropylene uniaxially stretched at constant temperature (T=30 degrees C) under a constant true strain rate (epsilon.zz = 5.103s1). To accurate measurements namely to be free of the recovering phenomenon which causes in most of the cases interference during post-mortem analysis, we introduced a new experimental setup combining a Raman spectrometer with a tensile machine piloted by the VideoTraction system. Microstructure is described by essential parameters such as the crystallinity index, the macromolecular orientation both in the crystalline and the amorphous phase, and distribution of the internal stress at the chemical bonds scale. For each, a well-tried Raman spectral criterion was used. Cross-checking of these results, obtained with a minimum of tensile tests, allows a more complete understanding of the deformation micromechanisms of semi-crystalline polymer. Copyright (c) 2013 John Wiley & Sons, Ltd. Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1002/jrs.4244 J.Martin M.Ponçot J.M. Hiver P.Bourson A.Dahoun article Mercier2013790 New Journal of Chemistry 2013 37 3 790-795 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84874091228&partnerID=40&md5=cb042fda4868e8defce23d523873e3b1 G.Mercier C.Herold J.-F.Marêché S.Cahen J.Gleize J.Ghanbaja G.Lamura C.Bellouard B.Vigolo article ISI:000327812700036 JOURNAL OF PHYSICAL CHEMISTRY C 2013 117 47 24948-24954 Département P2M : Surfaces et Spectroscopies 1932-7447 10.1021/jp409258z Boris V.Andryushechkin Vladimir V.Cherkez Eugeny V.Gladchenko Tatiana V.Pavlova Georgy M.Zhidomirov BertrandKierren ClementDidiot YannickFagot-Revurat DanielMalterre Konstantin N.Eltsov article McCord2013 Physical Review B - Condensed Matter and Materials Physics 2013 88 1 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84880769033&partnerID=40&md5=47274bc59c9fc38ce0cc2241077e1f62 J.McCord S.Mangin article Cascales20134347 IEEE Transactions on Magnetics 2013 49 7 4347-4350 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84880842943&partnerID=40&md5=64dd058a9b4a18443d9d19d03bcc9a54 J.P.Cascales L.Martin A.Dulluard M.Hehn C.Tiusan T.Szczepa?ski V.Dugaev J.Barnaš F.G.Aliev article Cascales20134347 IEEE Transactions on Magnetics 2013 49 7 4347-4350 Centre de Compétences : MiNaLor micro et nanotechnologies http://www.scopus.com/inward/record.url?eid=2-s2.0-84880842943&partnerID=40&md5=64dd058a9b4a18443d9d19d03bcc9a54 J.P.Cascales L.Martin A.Dulluard M.Hehn C.Tiusan T.Szczepa?ski V.Dugaev J.Barna? F.G.Aliev article Zhang2013 Applied Physics Letters 2013 102 1 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84872350464&partnerID=40&md5=eae9e693ba3fa39f819baf4eea62e3ad H.ZHANG W.Lin S.Mangin Z.Zhang Y.Liu article ISI:000313651600047 JOURNAL OF ALLOYS AND COMPOUNDS 2013 551 274-278 Département CP2S : Métallurgie et Surfaces 0925-8388 10.1016/j.jallcom.2012.09.130 MurtazaBohra M. C.de Weerd VincentFournee R. K.Mandal N. K.Mukhopadhyay RatnamalaChatterjee G. V. S.Sastry article ISI:000312615500004 SURFACE SCIENCE 2013 608 22-30 Département P2M : Surfaces et Spectroscopies 0039-6028 10.1016/j.susc.2012.09.009 L.Walczak G.Goryl M. A.Valbuena I.Vobomik A.Tejeda A.Taleb-Ibrahimi J. J.Kolodziej P.Segovia E. G.Michel article ISI:000321307000037 CHEMICAL SCIENCE 2013 4 8 3263-3268 Département P2M : Surfaces et Spectroscopies 2041-6520 10.1039/c3sc50800e LuisCardenas RicoGutzler JoshLipton-Duffin ChaoyingFu Jaclyn L.Brusso Laurentiu E.Dinca MartinVondracak YannickFagot-Revurat DanielMalterre FedericoRosei Dmitrii F.Perepichka article 201-3780 Materials Chemistry and Physics 2013 142 199-206 Micro-gap discharges created in heptane between two platinum pin-electrodes produce platinum particles embedded in an amorphous carbon matrix which exhibits a short-range order. The platinum particles can be sorted by size. The largest ones (>100 nm in diameter) are created by emission of droplets from the liquid pool formed when the discharge hits the electrode surface. They are submitted to high stress levels by fast thermal quenching. The smallest ones (<5 nm) are synthesized in the plasma. Nanoparticles with diameters ranging from 10 to 20 nm have structure defects and are synthesized in post-discharge where huge temperature gradients exist. The short-range order observed in carbon extends typically over 3 nm, and it is observed by high-resolution transmission electron microscopy. This ordered structure of carbon (and a fortiori sp(3) bonds which are identified by FTIR analyses) is clearly visible around the smallest nanoparticles and it is likely formed at the same location, i.e. in the plasma. (C) 2013 Elsevier B.V. All rights reserved. Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1016/j.matchemphys.2013.07.006 A.Hamdan C.Noel J.Ghanbaja S.Migot-Choux T.Belmonte article Gopman2013 Physical Review B - Condensed Matter and Materials Physics 2013 88 10 Département P2M : Nanomagnétisme et Electronique de Spin http://www.scopus.com/inward/record.url?eid=2-s2.0-84884843823&partnerID=40&md5=c527e95f973a1a1420cf81d5e2507f35 D.B.Gopman D.Bedau G.Wolf S.Mangin E.E.Fullerton J.A.Katine A.D.Kent article ISI:000314881900009 APPLIED SURFACE SCIENCE 2013 267 35-39 Département P2M : Surfaces et Spectroscopies 0169-4332 10.1016/j.apsusc.2012.05.062 C.Tournier-Colletta L.Chaput A.Tejeda L. A.Cardenas B.Kierren D.Malterre Y.Fagot-Revurat P.Le Fèvre F.Bertran A.Taleb-Ibrahimi article 201-3786 Materials Chemistry and Physics 2013 143 116-123 The low energy (similar to 50-350 eV) noble gases ion bombardment of the steel surface shows that the pre-treatments increase nitrogen diffusion by modifying the outermost structure of the material. The surface microstructure and morphology of the studied samples were characterized by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The crystalline and chemical structures in the outermost layers of the surface were analyzed by grazing angle X-ray diffraction (GAXRD) and photoemission electron spectroscopy (XPS). Temperature effusion studies of the implanted ions are used to elucidate the noble gases site localization in the network. The local compressive stress induced by the nearby iron atoms on the core level electron wave functions of the trapped noble gases are studied by photoemission electron spectroscopy (XPS) and interpreted considering a simple mechanical model. Nano-hardness measurements show the dependence of the material elastic constant on the energy of the implanted noble gases. Although the ion implantation range is about few nanometers, the atomic attrition effect is larger enough to modify the material structure in the range of micrometers. Two material stress zones were detected where the outermost layers shows compressive stress and the underneath layers shows tensile stress. The implanted noble gases can be easily removed by heating. A diffusion model for polycrystalline-phase systems is used in order to discuss the influence of the atomic attrition on the N diffusion coefficient. The concomitant effect of grain refining, stress, and surface texture on the enhancing nitrogen diffusion effect is discussed. Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1016/j.matchemphys.2013.08.027 E.A.Ochoa R.Droppa R.L.O.Basso M.Morales S.Cucatti L.F.Zagonel T.Czerwiec M.C.Dos Santos C.A.Figueroa F.Alvarez article ISI:000321687800002 CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2013 55 3 289-367 Département CP2S : Métallurgie et Surfaces 0161-4940 10.1080/01614940.2013.796192 M.Armbruester M.Behrens K.Foettinger M.Friedrich E.Gaudry S. K.Matam H. R.SHARMA article 201-3772 Journal of Physics D: Applied Physics 2013 46 175201 A 3D Monte Carlo code (OMEGA) was developed to simulate the transport of sputtered atoms in a magnetron discharge operating in direct current mode. Collisions between the sputtered Ti atoms and the neutral process gas atoms (Ar) were modelled. Spatially resolved simulated velocity distributions of the sputtered particles parallel as well as perpendicular to the cathode surface for different operating pressures were recorded and benchmarked against experimentally obtained profiles using laser-induced fluorescence. New differential (angular and energy-dependent) cross sections for Ti-Ar elastic collisions were thereby obtained, which resulted in good agreement between modelled and experimental results. The differences with respect to commonly used extrapolated Ar-Ar cross sections to describe the Ti-Ar interaction are highlighted and discussed. Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS http://dx.doi.org/10.1088/0022-3727/46/17/175201 D.Lundin C.Vitelaru DePoucques L N.Brenning T.Minea. article ISI:000314823600005 JOURNAL OF PHYSICS-CONDENSED MATTER 2013 25 9 Département P2M : Surfaces et Spectroscopies 0953-8984 10.1088/0953-8984/25/9/094004 Y.Fagot-Revurat C.Tournier-Colletta L.Chaput A.Tejeda L.Cardenas B.Kierren D.Malterre P.Le Fèvre F.Bertran A.Taleb-Ibrahimi