简介:<正>BrineresourceisrichinChina,butitsexploitationhasbeenaproblem.Hypersalinebrinewillcorrodeequipmentandmaterialsseriouslyduringthebrineexploitationandtransportation.Thecorrosionproblemcancausegreat
简介:Inordertotransfertheheatfromthearmortothecoolant,tungstenhastobeconnectedwithacopperheatsink.Thejointtechnologyisthemostcriticalissueformanufacturingplasmafacingcomponents.Consequently,thereliabilityofthejointsshouldbeverifiedbyagreatnumberofhigh-heat-flux(HHF)teststosimulatetherealloadconditions.W/CubrazedjointtechnologywithsliverfreefillermetalCuMnNihasbeendevelopedatSouthwesternInstituteofPhysics(SWIP).Screeningandthermalfatiguetestsofonesmall-scaleflattileW/CuCrZrmockupwereperformedona60kWelectron-beamMaterialtestingscenario(EMS-60)constructedrecentlyatSWIP.Themodulesuccessfullysurvivedscreeningtestwiththeabsorbedpowerdensity(Pabs)of2MW/m2to10MW/m2andthefollowing1000cyclesatPabsof7.2MW/m2withouthotspotsandoverheatingzonesduringthewholetestcampaign.MetallurgyandSEMobservationsdidnotfindanycracksatbothsidesandtheinterface,indicatingagoodbondingofWandCuCrZralloy.Inaddition,finiteelementsimulationsbyANSYS12.0underexperimentalloadconditionswereperformedandcomparedwithexperimentalresults.
简介:<正>Natureisthemajorthemethatmanypoetsdealwithtoexpresstheirsorrowandjoy,lonelinessandhappiness;toseeklibertyandfreedom;toescapethesqalorofreallife;ortorevealtruthandphilosophy.Natureluresmanypoetsintoit.Notonlyisnaturethekingdomofpoeple’spouringouttheirfeeling,butalsothckingdomofbeautyofallcreatures——murmuringrivers,roilinghills,singingbirds,andsmilingflowers.Poetshaveendowednaturewithlifeandmergedthemselvesinit.Naturecanpurifysoulsandmouldtemperament.
简介:Inthecontextoftopcolor-assistedtechnicolor(TC2)model,westudythechargedandneutraltop-pionsproductionprocessγγ→W~+П_t~-П_t~0.Wefindthattheproductioncrosssectionislargerthanthatoftheprocessγγ→W~+H~-Hintheminimalsupersymmetricstandardmodel.WithreasonablevaluesoftheparametersintheTC2model,thecrosssectioncanreachthelevelofafewfb.Furthermore,theflavor-changing(FC)decaymodeП_t~0→tcisthebestchanneltodetecttheneutraltop-pionduetothecleanSMbackground.Withalargenumberofeventsandthecleanbackground,theneutraltop-pionshouldbeobservableatfuturelinearcollidersoperatinginγγmodeattheTeVenergyscale.
简介:摘要锅炉由于各种原因,运行中受热面经常出现结焦、超温、爆管、经济性达不到设计要求、可靠性低等问题降低机组安全运行。本文以习水二郎电厂锅炉B&WB-2090/25.4-M型“W火焰”超临界直流锅炉,阐述由于锅炉结焦原因导致锅炉安全运行的问题。主要从锅炉结构、煤质、运行调整等方面分析解决“W火焰”锅炉结焦方法和思路。
简介:对Cu-W-Ni-C与Ag-ZnO10触头材料的性能进行了对比和研究.在相对密度相同时,CuW-Ni-C材料的电阻率与Ag-ZnO10材料的电阻率接近,而硬度高于Ag-ZnO10材料的硬度.温升和通断能力试验结果表明:Cu-W-Ni-C材料在电力机车电器上完全可替代Ag-ZnO10材料.
简介:Inthisstudy,tungsten(W)wascoatedonacopper(Cu)substratebyusingdouble-glowdischargetechniqueusingapureWpanelasthetargetandargon(Ar)asthedischargeandsputteringgas.ThecrystalstructureoftheWcoatingwasexaminedbyX-raydiffraction(XRD).Scanningelectronmicroscopy(SEM)wasperformedwithcross-sectionimagestoinvestigatethepenetrationdepthofWintotheCubody.Additionally,thepropertiesofwearabilityresistance,corrosionresistanceandmechanicalstrengthoftheWcoatedCumatrixwerealsomeasured.Itisconcludedthatindouble-glowplasma,WcoatedCucanbefacilelyprepared.ItisnoticedthatthetreatmenttemperatureheavilydominatesthepropertiesoftheW-Cucomposite.