Advanced Materials Processing  
Dynamical processes
Optical materials
Nanocomposites fabrication and coatings
Electromagnetic processing of functional materials

Laboratory for Advanced Materials Processing

Our laboratory adds competences in challenging materials production, structuring and machining, and improved rapid thermal processing of materials. It combines understanding of safe fabrication of dry nanopowders in the several grams per hour scale, its mixing with other materials and transformation into compact materials. Furthermore understanding and know-how of electromagnetic wave - materials interactions are used for example for optimal microwave heating of complex multi-component materials and systems. A third activity takes care of in depth studies and analysis of dynamics of processing such as classical and laser machining processes, plasma dynamics for particle production and multi-component coatings for a variety of industrial applications. Optical materials will be added to our competences as growing activity. The three groups

work in close collaboration and overlapping activities. Materials microstructure analysis is a binding and bridging activity in the laboratory. From the production of nano-particles through mixing to shaping, we cover the full range of research and development of novel composite materials. The focus lies in understanding of process dynamics, how to finalize the consolidation process, or how to cost and energy efficiently stabilize, or structure in a generative process the materials as final device or in devices.

Current publications

 

Publications 2014

Battisti, A., D. Esqué-de los Ojos, R. Ghisleni, and A.J. Brunner, Single fiber push-out characterization of interfacial properties of hierarchical CNT-carbon fiber composites prepared by electrophoretic deposition. Composites Science and Technology, 2014. 95(10): p. 121-127.

Blugan, G., M. Hadad, T. Graule, and J. Kuebler, Si3N4–TiN–SiC three particle phase composites for wear applications. Ceramics International, 2014. 40(1): p. 1439-1446.

Bradbury, C.R., J.K. Gomon, L. Kollo, H. Kwon, and M. Leparoux, Hardness of Multi Wall Carbon Nanotubes reinforced aluminium matrix composites. Journal of Alloys and Compounds, 2014. 585: p. 362-367.

Graça, S., V. Trabadelo, A. Neels, J. Kübler, V. Le Nader, G. Gamez, M. Döbeli, and K. Wasmer, Influence of mosaicity on the fracture behavior of sapphire. Acta Materialia, 2014. 67: p. 67-80.

Kwon, H., M. Leparoux, and A. Kawasaki, Functionally Graded Dual-nanoparticulate-reinforced Aluminium Matrix Bulk Materials Fabricated by Spark Plasma Sintering. Journal of Materials Science & Technology, 2014. 30(8): p. 736-742.

Kwon, H., M. Saarna, S. Yoon, A. Weidenkaff, and M. Leparoux, Effect of milling time on dual-nanoparticulate-reinforced aluminum alloy matrix composite materials. Material Science and Engineering A, 2014. 590: p. 338-345.

Reinke, M., Y. Kuzminykh, and P. Hoffmann, Limitations of patterning thin films by shadow mask high vacuum chemical vapor deposition. Thin Solid Films, 2014. 563: p. 56-61.

Rowthu, S., B.S. Murty, and R.S. Kottada, Alloying, thermal stability and strengthening in spark plasma sintered AlxCoCrCuFeNi high entropy alloys. Journal of Alloys and Compounds, 2014. 583: p. 419–426.

Schöbel, M., G. Requena, G. Fiedler, D. Tolnai, S. Vaucher, and H.P. Degischer, Void formation in metal matrix composites by solidification and shrinkage of an AlSi7 matrix between densely packed particles. Composites Part A, 2014. 66: p. 103-108.

Wurm, A., D. Lellinger, A.A. Minakov, T. Skipa, P. Pötschke, R. Nicula, I. Alig, and C. Schick, Crystallization of poly(ε-caprolactone)/MWCNT composites: A combined SAXS/WAXS, electrical and thermal conductivity study. Polymer, 2014. 55(9): p. 2220-2232.

 

Publications 2013

Cabanes-Sempere, M., J.M. Catala-Civera, F.L. Penaranda-Foix, C. Cozzo, S. Vaucher, and M.A. Pouchon, Characterization method of dielectric properties of free falling drops in a microwave processing cavity and its application in microwave internal gelation. Measurement Science and Technology, 2013. 24(9).

Kuzminykh, Y., A. Dabirian, M. Reinke, and P. Hoffmann, High vacuum chemical vapour deposition of oxides: A review of technique development and precursor selection. Surface and Coatings Technology, 2013. 230: p. 13-21.

Kwon, H., G.G. Lee, M. Leparoux, and A. Kawasaki, Functionally Graded Dual-Nanoparticulate-Reinforced Aluminum Matrix Composite Materials Journal of Physics: Conference Series, 2013. 419(1): p. 4.

Kwon, H., M. Takamichi, A. Kawasaki, and M. Leparoux, Investigation of the interfacial phases formed between carbon nanotubes and aluminum in a bulk material. Materials Chemistry and Physics, 2013. 138(2-3): p. 787-793.

Mahadik, S.A., V.G. Parale, R.S. Vhatkar, D.B. Mahadik, M.S. Kavale, P.B. Wagh, S.C. Gupta, and J.L. Gurav, Superhydrophobic silica coating by dip coating method. Applied Surface Science, 2013. 277: p. 67-72.

Pathak, S., R.D. Doherty, A.D. Rollett, J. Michler, and K. Wasmer, Caught in the act: Grain-switching and quadrijunction formation in annealed aluminum. Scripta Materialia, 2013. 69(1): p. 37-40.

Pouvreau, C., K. Wasmer, H. Hessler-Wyser, J.D. Ganière, J.M. Breguet, J. Michler, D. Schulz, and J.H. Giovanola, Nanoindentation cracking in gallium arsenide: Part II. TEM investigation. Journal of Materials Research, 2013. 28(20): p. 2799 - 2809.

Reinke, M., Y. Kuzminykh, G. Malandrino, and P. Hoffmann, Precursor adsorption efficiency of titanium tetra isopropoxide in the presence of a barium β-diketonate precursor. Surface and Coatings Technology, 2013. 230: p. 297-304.

Saarna, M., F. Sergejev, J.K. Gomon, L. Kollo, and M. Leparoux, Surface fatigue of Al-metal matrix composites at impact loading. Key Engineering Materials, 2013. 527: p. 119-124.

Wasmer, K., M. Parlinska-Wojtan, S. Graça, and J. Michler, Sequence of deformation and cracking behaviours of Gallium–Arsenide during nano-scratching. Materials Chemistry and Physics, 2013. 138(1): p. 38-48.

Wasmer, K., C. Pouvreau, J.M. Breguet, J. Michler, D. Schulz, and J.H. Giovanola, Nanoindentation cracking in gallium arsenide: Part I. In situ SEM nanoindentation. Journal of Materials Research, 2013. 28(20): p. 2785 - 2798.

 

Publications 2012

Bret, T., Hoffmann, P., How to select compounds for focused charged particle beam assisted etching and deposition, in : Utke, I., Moshkalev, S., Russel, P. (Eds.), Nanofabrication using focused ion and electron beams: principles and applications, Oxford Series in nanomanufacturing, Oxford University Press, New York (ISSN/ISBN 978-0-19-973421-4), 2012, Section 2, pp. 108-125.

Cabanes-Sempere, M., Cozzo, C., Catala-Civera, J.M., Penaranda-Foix, F.L., Ishizaki, K., Vaucher, S., Pouchon, M.A., Characterization of free falling drops inside a microwave cavity, 2012 IEEE MTT-S International Microwave Symposium (MTT 2012).

Kiley, Erin M., Yakovlev, Vadim V., Ishizaki, Kotaro, Vaucher, Sebastien, Applicability Study of Classical and Contemporary Models for Effective Complex Permittivity of Metal Powders, J. Microwave Power & Electromagnetic Energy – JMPEE 46 (1) (2012) pp. 26-38.

Colombo V., Deschenaux C., Ghedini E., Gherardi M., Jaeggi C., Leparoux M., Mani V., Sanibondi P., Fluid-dynamic characterization of a radio-frequency induction thermal plasma system for nanoparticle synthesis, Plasma Sources Sci. Technol. 21 (4) (2012) 045010.

Kwon H., Leparoux M., Hot extruded carbon nanotube reinforced aluminum matrix composite materials, Nanotechnology 23 (41) (2012) 415701.

Wellmann R.G., Graca S., Chromite vs. magnetite as an erodent for coatings to be applied in steam turbines, Wear 296 (1-2) (2012) 479.

Jaeggi C., Parlinska-Wojtan M., Kern P., Correlation of electrolyte-derived inclusions to crystallization in the early stage of anodic oxide film growth on titanium, Thin Solid Films 520 (6) (2012) pp. 1804-1808.

Affiliation

Laboratory for Advanced Materials Processing
Empa - Materials Science & Technology
Feuerwerkstrasse 39
CH-3602 Thun

Tel.: +41 58 765 1133
Fax.: +41 33 228 4490

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Contact :
Head of laboratory
Prof. Dr. Patrik Hoffmann
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