0000000000419919

AUTHOR

Christophe Verdy

showing 3 related works from this author

Stable layer-building strategy to enhance cold-spray-based additive manufacturing

2020

Abstract Cold spray (CS) has recently become one of the popular additive manufacturing (AM) processes for its advantages: high-forming efficiency, low temperature, and no phase changing of materials. These advantages may make CS able to form large volume objects and possibly directly iterate with material-removing processes to become a hybrid AM process. Current research proposes using a bulk-based volume-forming strategy (e.g. a tessellation-based method) for volume building. Although it can form 3D volumes, the control of the process is difficult and it has limitations in forming complex 3D near-net-shapes with acceptable accuracy. This also conflicts with the basic principle of AM, where…

0209 industrial biotechnologyMaterials scienceTessellationbusiness.industryBiomedical EngineeringProcess (computing)Volume (computing)Gas dynamic cold spray02 engineering and technologyKinematicsBenchmarking021001 nanoscience & nanotechnologyIndustrial and Manufacturing Engineering[SPI]Engineering Sciences [physics]020901 industrial engineering & automationProcess controlGeneral Materials ScienceLayer (object-oriented design)0210 nano-technologyProcess engineeringbusinessEngineering (miscellaneous)
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Bonding behavior of Bi-metal-deposits produced by hybrid cold spray additive manufacturing

2022

Abstract Cold spraying (CS) is one of the most recently used additive manufacturing (AM) processes that allow forming large 3D objects efficiently without severe thermal effects. However, due to some limitations of the CSAM process, it is difficult to achieve the desired geometry with high precision. As a potential solution to this issue, CSAM process coupled machining, that is, hybrid addition and subtraction manufacturing, is proposed to achieve desired accuracy and reliable shape. Therefore, it is necessary to assess the mechanical reliability of multilayer deposits deposited by CSAM + machining processes before that. In this work, different bi-deposits were obtained via hybrid CSAM. The…

Materials scienceScanning electron microscopeMetals and AlloysGas dynamic cold sprayAdhesionSurface finishIndustrial and Manufacturing EngineeringComputer Science ApplicationsBimetalMachiningModeling and SimulationUltimate tensile strengthCeramics and CompositesComposite materialInterlockingJournal of Materials Processing Technology
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Microstructure and electric properties of low-pressure plasma sprayed β-FeSi 2 based coatings

2017

Abstract Thermoelectric material β-FeSi 2 based coating was fabricated by the technique low-pressure plasma spray (LPPS) on the Al 2 O 3 substrate from different alloy powders. During the process LPPS, the phase transformation had occurred through the peritectoid, eutectoid reaction and their inverse reaction. The grain size of the as-sprayed β-FeSi 2 doped Co coatings was reduced comparing with the original feedstock powders, which implied the thermal conductivity could effectively decreased by the LPPS process. The room temperature electrical conductivity showed metal and semiconductor properties on the as-sprayed and annealed coatings. This method and the results could solve the problems…

010302 applied physicsMaterials scienceMetallurgyAlloy02 engineering and technologySurfaces and InterfacesGeneral Chemistryengineering.material021001 nanoscience & nanotechnologyCondensed Matter PhysicsThermoelectric materialsMicrostructure01 natural sciencesGrain sizeSurfaces Coatings and FilmsThermal conductivityCoating0103 physical sciencesMaterials ChemistryengineeringComposite material0210 nano-technologyThermal sprayingEutectic systemSurface and Coatings Technology
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