Publications associées à Projection thermique

Investigations on Caesium Dispersion and Molybdenum Coating on SPIDER Components

SPIDER is the 100 keV full-size Negative Ion Source prototype of the ITER Neutral Beam Injector, operating at Consorzio RFX in Padova, Italy. The largest Negative Ion Source in the world, SPIDER generates an RF driven plasma from which Deuterium or Hydroge ...

2023

The role of nanocrystalline binder metallic coating into WC after additive manufacturing

Eric Boillat, Jamasp Jhabvala

Tungsten carbide with microsized particle powders are commonly used embedded in a tough binder metal. The application of these composites is not limited to cutting tools, WC based material has been increasingly used in gaskets and other mechanical parts wi ...

Elsevier2018

Mechanical and microstructural characteristics of Ti6Al4V/AA2519 and Ti6Al4V/AA1050/AA2519 laminates manufactured by explosive welding

Marco Cantoni

The aim of the work was to produce laminated structures consisting of Ti-6Al-4V alloy and AA2519 plates and to investigate their microstructure and mechanical properties with anemphasis on the role of an additional AA1050 interlayer. Explosive welding was ...

Elsevier Sci Ltd2016

New approach to low thermal conductivity of thermal barrier protection with improved mechanical integrity

Heinrich Hofmann, Paul Bowen, Abhishek Tewari

Layered ceramic systems with designed stacks of dense and porous layers were investigated as alternative for thermal barrier protection system (TBPs). This approach gives the possibility to obtain low thermal conductivity with the impact protection of dens ...

Elsevier2016

Properties of Spinel Protective Coatings Prepared Using Wet Powder Spraying for SOFC Interconnects

Jan Van Herle, Michele Bianco

A wet powder spraying (WPS) method was applied to prepare protective layers of manganese cobalt spinel oxide (MCO) on commercial stainless steels of solid oxide fuel cell (SOFC) interconnects. Densification of the MCO layer was dependent on the thermal tre ...

2015

Electrochemical Performance of Nd1.95NiO4+delta Cathode supported Microtubular Solid Oxide Fuel Cells

Jan Van Herle

Nd1.95NiO4+delta (NNO) cathode supported microtubular cells were fabricated and characterized. This material presents superior oxygen transport properties in comparison with other commonly used cathode materials. The supporting tubes were fabricated by col ...

2015

Metal-coated silicon micropillars for freestanding 3D-electrode arrays in microchannels

Carlotta Guiducci, Samuel Kilchenmann, Elena Bianchi, Enrica Rollo

This paper presents a fabrication process for arrays of high-aspect-ratio micropillar electrodes, which are freestanding 3D structures that feature metal sidewalls connected to passivated planar wires. Facing vertical electrodes are considered to be a key ...

Elsevier2013

Formation of cubic structured (Al1-xCrx)(2+delta)O-3 and its dynamic transition to corundum phase during cathodic arc evaporation

Alireza Karimi, Hossein Najafi

Mixed aluminum-chromium oxide coatings in the form of (Al,Cr)(2)O-3 solid solutions have attracted extensive research interest during the past years due to their successful use for challenging wear applications and the comparative ease of their moderate-te ...

Elsevier Science Sa2013

Plasma Jet-Substrate Interaction in Low Pressure Plasma Spray-CVD Processes

Christoph Hollenstein, Philippe Frédérique Bruno Guittienne, Malko Gindrat

Conventional equipment for plasma spraying can be adapted for operation at low pressure so that PECVD-like processing can be performed. The plasma jet generated by the torch is characterized by a high convective velocity and a high gas temperature. The inf ...

Springer US2012

Plasma deposition in an ideal showerhead reactor: a two-dimensional analytical solution

Christoph Hollenstein, Alan Howling, Boris Legradic, Michaël Chesaux

The interplay of gas flow and depletion by plasma dissociation determines the spatial distribution of species and the deposition uniformity in a plasma source. Many plasma reactors use a gas showerhead and the design of the flow dynamics is a critical aspe ...

2012

Plasma Spray-CVD: A New Thermal Spray Process to Produce Thin Films from Liquid or Gaseous Precursors

Christoph Hollenstein, Malko Gindrat, Philippe Frédérique Bruno Guittienne

New dedicated coating processes which are based on the well-known LPPS (TM) technology but operating at lower work pressure (100 Pa) are being actively developed. These hybrid technologies contribute to improve the efficiencies in the turbine industry such ...

2011

Mechanisms of films and coatings formation from gaseous and liquid precursors with low pressure plasma spray equipment

Christoph Hollenstein, Malko Gindrat, Philippe Frédérique Bruno Guittienne

Plasma spraying is a well developed and widely used technology, successfully applied for ceramic and metal coatings in many fields of applications such as aeronautics, gas turbine, automotive or medical. The coatings obtained are usually intentionally poro ...

Elsevier2009

Diffusion-barrier coating for protection of moisture and oxygen sensitive devices

Yves Leterrier, Bandeep Singh

Barrier film for encapsulation of oxygen and moisture sensitive devices comprising a base polymer substrate and applied onto the base substrate, a barrier layer comprising an inorganic coating deposited by a vapour deposition method, characterised in that ...

2008

Hybrid nanocomposite gas-barrier coatings on polymers

Bandeep Singh

Gas barrier coatings based on single or multiple layers of metals, oxides or nitrides are widely used on polymer substrates in applications ranging from food packaging to organic displays and solar cells. These coatings exhibit a residual permeability resu ...

EPFL2007

Anisotropic nanoporous coating

Heinrich Hofmann, Laurent-Dominique Piveteau

Porous coating production, e.g. for medical implant, involves depositing first mono-layer(s) of temporary particles on surface, depositing coating(s) on particles, eliminating temporary particles forming pores, and coating fixation step NOVELTY - Producing ...

2006

Process monitoring of alumina nanoparticle synthesis by inductively coupled RF thermal plasma

Jong-Won Shin

Since the first inductively coupled plasma (ICP) torch was developed in the 60's, RF thermal plasmas have found a variety of applications in material processing such as crystal growth, thermal spray coatings, spheroidization and vaporization of refractory ...

EPFL2006

Stress controlled gas-barrier oxide coatings on semi-crystalline polymers

Yves Leterrier, Gil Rochat

Thin silicon oxide (SiOx) barrier coatings formed by plasma enhanced chemical vapor deposition on poly(ethylene terephthalate) (PET) substrates were subjected to post-deposition annealing treatments in the temperature range for orientation relaxation of th ...

2005

Experimental study of cellular instabilities in non-premixed flames

David Lo Jacono

A systematic experimental study was performed to elucidate the conditions for which cellular patterns of diluted hydrogen diffusion flames near extinction were observed. The formation of cellular instabilities was studied for several burners: jet burners ( ...

EPFL2005