简介:Newcarbonbondedfilterswith'activeandreactivecoatings'forhigherfiltrationefficiencyofaluminabasedinclusionsaswellasnano-engineeredfilterswithnano-scaledadditivesareexploredwiththeaidofimpingementtestsandareevaluatedaccordingtotheircoldcrushingstrengthsatroomtemperature.ThecombinationofcarbonnanotubesandaluminananosheetsadditivesleadstoinsituformationofAl3CON.Boththenanoscaledadditivesaswellastheextraalumina'active'coatingleadtoimprovedmechanicalperformanceofthecarbonbondedfiltersandopenthehorizonforfiltermacrostructureswithhigherfiltrationcapacitiesinmeansofbiggerdimensions.InafurtherstepMWCNT(multiwalledcarbonnanotubes)incombinationwithasyntheticpitchhavebeenusedasafunctionalcoatingonthesurfaceofaluminacarbonbondedfilters.Thesefiltershavethenbeenevaluatedalsowithuncoatedfiltersinaspecialcastingsimulatorandtheinteractionsbetweensteelandfilteringmaterialhavebeeninvestigated.
简介:Measuredhighlyelevatedgainsofproton–boron(HB11)fusion(Picciottoetal.,Phys.Rev.X4,031030(2014))confirmedtheexceptionalavalanchereactionprocess(Lalousisetal.,LaserPart.Beams32,409(2014);Horaetal.,LaserPart.Beams33,607(2015))forthecombinationofthenon-thermalblockignitionusingultrahighintensitylaserpulsesofpicosecondsduration.Theultrahighaccelerationabove1020cms-2forplasmablockswastheoreticallyandnumericallypredictedsince1978(Hora,PhysicsofLaserDrivenPlasmas(Wiley,1981),pp.178and179)andmeasured(Sauerbrey,Phys.Plasmas3,4712(1996))inexactagreement(Horaetal.,Phys.Plasmas14,072701(2007))whenthedominatingforcewasovercomingthermalprocesses.ThisisbasedonMaxwell’sstresstensorbythedielectricpropertiesofplasmaleadingtothenonlinear(ponderomotive)forcefNLresultinginultra-fastexpandingplasmablocksbyadielectricexplosion.Combiningthiswithmeasuredultrahighmagneticfieldsandtheavalancheprocessopensanoptionforanenvironmentallyabsolutecleanandeconomicboronfusionpowerreactor.ThisissupportedalsobyotherexperimentswithveryhighHB11reactionsunderdifferentconditions(Labauneetal.,NatureCommun.4,2506(2013)).