JF Silvain

JF Silvain's picture

Membership: 

Adjunct Professor

Address: 

Institut de Chimie de la Matière Condensée de Bordeaux – ICMCB-CNRS 87, Avenue du Docteur Albert Schweitzer F-33608 Pessac Cedex – France -
Home adress: 8, Avenue Julien Ducourt, F-33610 Cestas - France -

Phone: 

+33 (0)5 40 00 84 37
+33(0)6 36 67 69 02

Email: 

silvain@icmcb-bordeaux.cnrs.fr

Website: 

www.icmcb-bordeaux.cnrs.fr/pwpr/jean-francois-silvain.html

Research Interests: 

Senior researcher in French national laboratory (CNRS) called ICMCB in Bordeaux (France). My main field of interest is the processing and the characterization of ceramic and inorganic multi materials going from metal and ceramic matrix composite (CMC and MMC) to functionally graded materials (FGM) with the aim to develop material with adaptive physical (thermal, electrical) and/or mechanical properties. We are currently working on new processes, for metal powder, like hot extrusion process, Equal-channel angular pressing, microwave sintering (with and with out pressure) and spark plasma sintering. For all of these materials the scientific approach is the following: 1. Definition of material specification from the industrial or the academic demand 2. Definition of the main component of the material 3. Numerical approach of the material architecture and of the final properties (model material can be use in that step) 4. Definition of the appropriate architecture 5. Definition of the elaboration process and conditions (temperature, time, pressure, atmosphere, …) 6. Definition and processing of the ideal interfacial zones between the components 7. Characterization of the components and of the interfacial zones 8. Characterization of the asked properties of the processing material 9. Correlation between the elaboration process and the final properties The different systems (Metal/Reinforcement) that have been studied are the following: (For all the following results all powder metallurgy material have been process using uniaxial hot pressing under controlled atmosphere) 1. NiAl/Al2O3 i. Liquid route (1800°C) : definition and elaboration of the hot equipment ii. PVD model materials iii. Optimisation of the interfacial zone (addition of Fe in the matrix) iv. Metallographic properties of the MMC v. Mechanical properties 2. SnAgCu/NiTi and SnPb/NiTi i. Liquid route ii. Model composite iii. Chemical coating (electroless) of the NiTi spherical particles: optimisation of the process in order to control the thickness, uniformity and adhesion of the coating iv. Metallographic properties of the MMC v. Industrial application: new solder joint for electronic industries 3. Al/C; Al/Au/C; Al/Ni/C; Cu/C (C: carbon long fibre, carbon short fibre, carbon particles) i. Liquid route ii. PVD model composite iii. Optimisation of the interfacial zone (to avoid the chemical reaction between C and Al: carbide formation) iv. Metallographic properties of the MMC v. Thermal and mechanical properties 4. Al (alloy)/TiB2 i. Liquid route ii. Ex-situ and in-situ MMC iii. Interfaces characterization (microstructural and chemical) iv. Metallographic properties of the MMC v. Mechanical properties vi. Correlation between the alloying elements and the final mechanical properties 5. Cu(alloy)/C (C: carbon short fibre and carbon particles) i. Liquid route ii. Role of the alloying element on the wetting behaviour (on flat sample) iii. Interfaces characterization (microstructural and chemical) iv. Metallographic properties of the MMC v. Mechanical properties 6. Cu/C, Cu(alloy)/C; Cu/NFC, Cu/NTC; Cu/diamond (C: carbon long fibre, carbon short fibre and carbon particles) i. Solid route ii. Numerical simulation of the thermal properties iii. Optimisation of the interfacial zone (to increase the chemical reaction between C and Cu: carbide formation) iv. Chemical coating of Cu on CNF and CNT with “electroless” and new salt decomposition process v. Metallographic properties of the MMC vi. Thermal properties vii. Correlation between the alloying elements and the final thermal properties

Education: 

1976-1977 « Baccalauréat E » (Mathematic and technology)
1977-1982 Master of Material Science (DEA) University of Sciences - POITIERS
1982-1984 Ph.D of materials Science. « Crystallographic studies of polycrystalline silicon used in solar cells »
1984-1987 Ph.D of the University of POITIERS « Microstructural study of "soft" and "hard" magnetic materials »

Experience: 

1982-1984 Ph.D. Research, Department of Material Science, University of Poitiers TEM and EBIC studies of dislocations : correlation between dislocation structures and their electrical behaviour 1984-1987 Post-doctoral Researcher, University of Carne
1984-1987 Post-doctoral Researcher, University of Carnegie Mellon, Department of Metallurgical Engineering and Material Science, Pittsburgh (USA) Microstuctural characterisation of implanted garnet substrate used in bubble memories Elaboration and ch
1988-1991 CNRS research fellow (CR2), Laboratoire Maurice Letort, Nancy (France) Fabrication and characterisation of metal thin films thermally evaporated onto different polymers
1998 Senior Researcher, NIMC, Tsukuba (Japan) (6 months) Modification, after laser treatment, of polymer composite surface
2001 - Senior Researcher (DR2), “Institut de chimie de la matière condensée de Bordeaux”, Bordeaux (France) Characterisation and optimisation of metal/fibre metal/powder interfaces in different metal matrix composite Simulation, elaboration and charact
2005 - 2008 General Director of a “Start up” company called “Thermidrain”

Students Advised: 

ED1 J.C. BIHR (BDI) – 1992 - 1995 – Le matériau composite NiAl/Al2O3 ED2 Javier GONI ARRIZABALAGA – 1993 - 1996 – Elaboration et caractérisations de composites particulaires céramiques-alliages de cuivre ED3 Sandrine TROMBERT (CIFRE) – 1996 - 1999 – Etude des joints de brasure superélastique pour le report de composants électroniques : aspects physico-chimiques, microstructuraux et mécaniques ED4 Olivier FOUASSIER – 1998 - 2001 – Le matériau composite NiTi/SnAgCu ED5 Pierre-Marie GEFFROY – 2002 – 2005 – Mise en forme d’alliages ferreux et non ferreux par un procédé de fonderie assisté par un champ magnétique ED6 Pedro Maria AGIZABAL – 2003 – 2007 – Influence of TiB2 particles on the microstructure and properties of reinforced Al-Si7Mg0.3 and Al-Cu5MgTi alloys for plaster casting applications ED7 Cécile VINCENT – 2005 – 2008 – Composites fonctionnels à nanotubes et nanofibres de carbone ED8 Amélie VEILLERE – 2006 – 2009 – Drains thermiques adaptatifs cuivre allié/nanofibre de carbone ED9 Grégory LALET – 2007 – 2010 – Composites à matrice d’aluminium (ou d’alliage d’aluminium) et renforts de carbone (Fibre, nano fibre) élaborés par extrusion à chaud de poudres ED10 Guillaume LACOMBE – 2007 – 2010 – Drains thermiques Cu/C à architecture contrôlée élaborés par extrusion à chaud de poudres et report direct DBC - drain thermique ED11 Iban VICARIO – 2008 – 2011 – Influence de particules nanométriques (Al2O3, TiB2, SiC) sur la microstructure et sur les propriétés d’un alliage d’aluminium (AlSi9Cu3) pour des applications de fonderie sous pression ED12 Thomas GUILLEMET – 2009 – 2013 – Multi matériaux Diamant - Cu/C et Diamant - Al/C élaborés par frittage micro - onde sous pression ED13 Matthieu BARDET – 2010 – 2013 – Composite base titane renforcé par des nano particules de type TiB et TiC ED14 Toufic TAYEH – 2010 – 2013 – Composés à base de magnésium pour le stockage et/ou le la production délocalisée d’hydrogène ED15 Ségolène COCOLLOMB – 2010 – 2013 – CEA 1 ED16 Régis THOMAS – 2010 – 2013 – CEA 2 ED17 Guy-Marie VALLET – 2012– 2015 – Elaboration et caractérisation de nouveaux matériaux composites à matrice métalliques (cuivre et aluminium) ayant des propriétés électriques améliorées ED18 Rudy GUICHETEAU – 2012 – 2015 – Etude des conditions de mise en forme des poudres métalliques dans les pièces industrielles à vocation électromagnétique ED19 Emilien FEUILLET – 2013 – 2016 – Report direct en électronique de puissance

Patents: 

Plaques composites à fibre de carbone dans une matrice cuivre et leurs procédés de fabrication B. Bonniau, V. Heim, J.F. Silvain Brevet Thomson CSF n° 9305143 déposé le 30/04/93
Procédés de réalisation de pâte à braser et joint de soudure obtenu J. Chazelas, O. Prevotat, J.F. Silvain, S. Trombert Brevet Thomson CSF n° 9716349 déposé le 23/12/97
Procédé de fabrication de films mince en composite métal/céramique J.F. Silvain, T. Chartier, P.M. Geffroy Brevet CNRS n° 0015984 déposé le 8 décembre 2000 (extension internationale)
Procédé de fabrication de plaques en composite métal/céramique J.F. Silvain, P.M. Geffroy Brevet CNRS n° 0114265 déposé le 05 novembre 2001 Extension: International Patent WO 03039792 (2003-05-15)
Procédé de fabrication par métallurgie des poudres de drain thermique et de sa mise en forme J.F. Silvain, P.M. Geffroy, P. Despagne Brevet CNRS-Open Mind avril 2002
Procédé de fabrication de films mince en composite métal/céramique Silvain J. F., Chartier T. and Geffroy P France Brevet FR 2818015. 2002-06-14. Extension: International Patent WO 0245888 (2002-06-13).
Procédé de fabrication d'un produit composite et en particulier d'un drain thermique. J.-F. Silvain, J.-E. Barbier, P. Despagne and P.-M. Geffroy. France Brevet FR 2841805. 2004-01-09. Extension: International Patent WO 2004005566 (2004-01-15).
Procédé de fabrication d'un produit composite et en particulier d'un drain thermique. J.-F. Silvain, J.-E. Barbier, P. Despagne and P.-M. Geffroy. Brevet européen n° 1520057 N° de dépôt international: PCT/FR2003/002043 N° de publication internationale :
Procédé de fabrication de films mince en composite métal/céramique Silvain J. F., Chartier T. and Geffroy P Brevet: Corée du Sud N° 847129 en date du 11/07/2008
Procédé de fabrication de films mince en composite métal/céramique Silvain J. F., Chartier T. and Geffroy P Brevet: USA N° 7,585,456 en date du 08/09/2009
Procédé de formation d’un dépôt métallique à la surface d’un substrat et applications Silvain J. F., Heintz JM, Vincent C. Brevet: FR N° 10 55 422 en date du 05/07/2010

Journal Publications:

2017 Li, Dawei, Lijia Jiang, Zhiyong Xiao, H. Rabiee Golgir, Xi Huang et al. " Large-Area 2D/3D MoS2-MoO2 Heterostructures with Thermally Stable Exciton and Intriguing Electrical Transport Behaviors." Advanced Electronic Materials (2017).
2017 Keramatnejad, K, Li, Dawei, H. Rabiee Golgir, Xi Huang et al. " Laser-assisted Nanowelding of Graphene to Metals: An Optical Approach towards Ultralow Contact Resistance" Advanced Materials Interfaces, (2017).
2017 Hossein Rabiee Golgir, Dawei Li, Kamran Keramatnejad, Qi Ming Zou, Jun Xiao, Fei Wang, Lan Jiang, Jean-Francois Silvain, and Yongfeng Lu "Fast Growth of GaN Epilayers via Laser-Assisted Metal Organic Chemical Vapor Deposition for Ultraviolet Photodetector Applications", ACS Appl. Mater. Interfaces, 2017.
2017 D.W. Li, Q.M. Zou,H. Rabiee-Golgir, K. Keramatnejad , X. Huang, J. Song, Z. Xiao, L. Fan, X. Hong, L. Jiang, J. silvain, S. Sunand Y. Lu "Controlled defect creation and removal in graphene and MoS 2 monolayer", Nanoscale, 2017.
2016 Jiang, L., Xiong, W., Zhou, Y., Liu, Y., Huang, X., Li, D., Baldacchini, T., Jiang, L. and Lu, Y., 2016. Performance comparison of acrylic and thiol-acrylic resins in two-photon polymerization. Optics Express, 24(12), pp.13687-13701.
2015 H. Kurita, T. Miyataka, A. Kawasaki, Y.F. Lu, and J.F. Silvain, “Interfacial Microstructure of Graphite Flake Reinforced Aluminum Matrix Composites Fabricated via Hot Pressing”, Composites Part A, doi:10.1016/j.compositesa.2015.03.013 (2015)
2015 L.S. Fan, Y.S. Zhou, M.X. Wang, Y. Gao, W. Xiong, J.F. Silvain, and Y.F. Lu, “The roles of key chemical intermediate species in diamond synthesis investigated using mass spectrometry”, RSC Adv, 5, 4822-4830(2015)
2015 D.W. Li, Y.S. Zhou, X. Huang, L. Jiang, J.-F. Silvain, and Y.F. Lu, “In situ imaging and control of layer-by-layer femtosecond laser thinning of graphene”, Nanoscale, DOI: 10.1039/ C4NR07078J (2015)
2015 Liu, Lei, Shuo Li, Xi Huang, Yao Lu, Kevin Chen, Raphaël Pik, Lan Jiang, Jean Francois Silvain, and Yong Feng Lu. "Detection of trace-level uranium and samarium in glasses by combined laser-induced breakdown spectroscopy and plasma-induced fluorescence spectroscopy." Journal of Analytical Atomic Spectrometry 30, no. 5 (2015): 1128-1132.
2014 X. Huang, X.N. He, W. Xiong, Y. Gao, L.J Jiang, L. Liu, Y.S. Zhou, L. Jiang, J.F. Silvain, and Y.F. Lu ,“Contrast enhancement using silica microspheres in coherent anti-Stokes Raman spectroscopic imaging”, Optics Express, Vol. 22, Issue 3, pp. 2889-2896 (2014).
2014 H. Rabiee Golgir, Y. Gao, Y. S. Zhou, L. S. Fan, P. Thirugnanam, K. Keramatnejad, and Y. F. Lu, “Low-Temperature Growth of Crystalline Gallium Nitride Films Using Vibrational Excitation of Ammonia Molecules in Laser-Assisted Metal Organic Chemical Vapor Deposition”, ACS Cryst. Growth Des., DOI: 10.1021/cg500862b (2014)
2014 J.F. Silvain, A. Veillère, and Y.F. Lu, “Copper-Carbon and Aluminum-Carbon Composites Fabricated by Powder Metallurgy Processes”, J. Phys., Conf. Ser., 525, 012015 (2014)
2014 Y.S. Zhou, L.S. Fan, Z.Q. Xie, L Jiang, J.F. Silvain, and Y.F. Lu, “Laser-Assisted Vibrational Control of Precursor Molecules in Diamond Synthesis”, Current Opinion in Solid State & Materials Science, DOI: 10.1016/j.cossms.2014.10.003 (2014)
2012 J.F. Silvain, C. Vincent, T. Guillemet, A. Veillère, J. M. Heintz, "Innovative process for submicronic Cu particles deposition onto various substrates", Materials Research Bulletin, 47, 500-503, 2012 .
 

Location

Department of Electrical and Computer Engineering
University of Nebraska-Lincoln
209N Scott Engineering Center
P.O. Box 880511
Lincoln, NE 68588-0511, USA
 

Contact

Phone: (402) 472-3771
Fax:     (402) 472-4732

Email: ylu2@unl.edu

 

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