0000000000746425

AUTHOR

Lorenzo Torrisi

showing 2 related works from this author

Characterization of ultra-high-molecular-weight polyethylene (UHMWPE) modified by ion implantation

2004

Abstract Surface modification of ultra high molecular weight polyethylene (UHMWPE) is induced by ion implantation of different ions at 300 keV energy. The aim of this work was the chemical, physical and mechanical characterization of the modified material in order to know deep inside about the effect of the ion beam upon the polymer. The irradiated surfaces are investigated by Raman spectroscopy, infrared absorption and micro-hardness analysis, scanning electron microscopy. Pin on disc measurements valuated the wear of the UHMWPE against a stainless steel probe; wear resistance increases of about 76% after the ion implantation. This result can be attributed to the ion bombardment inducing a…

chemistry.chemical_classificationUltra-high-molecular-weight polyethyleneMaterials sciencePolymers and PlasticsIon beamScanning electron microscopeUHMWPECharacterizationOrganic ChemistryMineralogyPolymerIonchemistry.chemical_compoundSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiIon implantationchemistryIon implantationIon implantation CharacterizationMaterials ChemistrySurface modificationIrradiationComposite materialPolymer
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Mechanical properties of nanostructured carbon layers grown by CVD and PLD techniques

2010

Pulsed laser deposition (PLD) and chemical vapour deposition (CVD) have been proven to be among the most successful techniques for growing the entire spectrum of carbon films, which can be used in a wide range of technical applications. Here an investigation has been performed to explore the effect of different growing techniques (PLD and CVD) and process parameters (such as deposition time and substrate type) on the films' morphology and mechanical properties. The mechanical properties of the grown thin films were characterised by means of nano/micro indentation and scratch test techniques. It was observed that the thickness of the Al2O3 interlayer (between the Fe catalyst nanoparticles an…

Nuclear and High Energy PhysicsMaterials scienceCarbon filmCarbon nanotubesChemical vapor depositionCarbon nanotubeRadiationCoating mechanical propertiesCarbon nanotubelaw.inventionPulsed laser depositionlawNanostructured carbonGeneral Materials ScienceCoating mechanical propertieNuclear and High Energy PhysicAdhesion; Carbon deposition; Carbon films; Carbon nanotubes; Coating mechanical properties; StrengthRadiationAdhesionCondensed Matter PhysicsCarbon depositionCarbon filmChemical engineeringAdhesionCarbon depositionMaterials Science (all)StrengthCarbon films
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