简介:研究了离子束辅助沉积(IBAD)制备氮化钛(TiN)重要参数氮钛到达比(N/Ti)对膜层性能的影响,并且采用俄歇谱分析(AES)、光电子谱分析(XPS)、X射线衍射分析(XRD)对膜层进行了相组成与成分分析,摸索了N/Ti对膜层的影响规律.
简介:Afterformationsometinoredepositssufferedmoreorlesstransformingbylatergeologicalpro-ccsscs,sothattheyhaveshownthefeaturesofpolymetallo8enicepochs,polymetallogenic8tagcs,polymctal1izations,polygenicmatters,multifactorore-control8andpolmpetallogenictypesetc.andtheyhavetransformedintopo1ygeneticcompound
简介:Throughinterfacialpoly-condensationofR2SnCl2(R=Me,Bu)withvariousdiacids,diphenols(diols),diamines,amino-acids,hydroxyacids,urea,orthiourea,aseriesoforgano-tinpoly-esters,poly-ethers,poly-amines,poly-amine-esters,poly-ureas,poly-thioureaswereprepared,andcharacterisedaltogethertotalling100polymers,amongwhich91arepreviouslyunreported.ThesynthesizedpolymershaveapotentialasathermostabilizerinPVCproducts.
简介:Eightnovelcompoundshavebeensynthesizedandtheyaretwoseriesofmixedtri(butyl/cyclohexyl)tincarboxylates:BunCy3-nSnO2CR(n=1,2;R=n-C3H7,C6H5,4-ClC6H4,4-NO2C6H4).InadditiontothestudiesoftheirstructureswithIR,119Snand13CNMR,wetestedtheirfungicidal,insec-ticidalandacaricidalactivities.Thepercentageofinhibitiontotheaforementionedphytopathogenisabout80—100%at50ppminglasshouseand100%forT.Uriticaeat500ppm.Thosefindingsindicatethatthiskindofcompoundshavebothfungicidalandacaricidalactivitiesandmayhaveagoodprospectforapplications.
简介:TheYinyanporphyrytindepositisablinddepositassociatedwithasmallgraniteporphyrystock.ThepetrologyandgeochemistryoftheYinyangraniteporphyrysuggestthatitisgeneticallyofthetransfor-mationtype,emplacedatthelatestageoffractionalcrystallizationwithinahigh-levelmagmachamber.Ore-formingfluidsarederivedpredominantlyfromthegraniticmagmaandtheyinteractwiththewallrocksintenselywhenfindingtheirwayupwardsthroughthegraniteporphyry.Fromthelowerpartoftheporphyryupwardsthefollowingalterationzonescanbedistinguished(a)slightlyalteredgraniteporphyry(withweakpotashfeldspathization),(b)protolithionite-quartzgreisenizationzone,(c)to-paz-quartzgreisenizationzone,(d)senicite-quartzsericitizationzone,and(e)silicificationzone(quartzcoreatthesurface).Tinmineralizationisrelatedtogreisenization,especiallytotopaz-quartzgreisenization.Rockandore-formingtemperaturesandoxygenfugacitiesareestimated,respectively.TherearesignificantdifferencesinmanyaspectsbetweentheYinyanporphyrytindepositandvolcan-ic-subvolcanicporphyrytindeposits.
简介:Titaniumnitride(TIN)filmsweredepositedonAISI304stainlesssteelsubstratesusinghollowcathodeplasmaphysicalvapordeposition(HC-PVD).TitaniumwasintroducedbyerodingtheTicathodenozzleandTiNwasformedinthepresenceofanitrogenplasmaexcitedbyradiofrequency(RF).Thesubstratebiasvoltagewasvariedfrom0to-300Vandtheuniformityinfilmthickness,surfaceroughness,crystalsize,microhardnessandwearresistanceforthefilmwithadiameterof20mmwasevaluated.Althoughthecentralzoneoftheplasmahadthehighestiondensity,thefilmthicknessdidnotvaryappreciablyacrossthesample.Theresultsfromatomicforcemicroscopy(AFM)revealedalowsurfaceroughnessdominatedbyanisland-likemorphologywithasimilarcrystalsizeontheentiresurface.Highermicrohardnesswasmeasuredatthecentralzoneofthesample.Thesampletreatedat-200Vhadexcellenttribologicalpropertiesanduniformity.
简介:Bis(β-alkoxycarbonylalkyl)tindichlorideswereinterfacialcondensedwithorganicdithio-alcoholstogiveaseriesofneworgano-tinpolymers.Experimentalparameterswerediscussed.Thepolymerssynthesizedweretestedfortheireffectontheheat-stabilizationofPVCresins.Theresultsareofinterestinthisareaofapplication.
简介:Nuclearbindingenergies,chargeradiiandthechargedistributionsofeven-eventin(Sn)isotopesarecalculatedusingrelativisticmeanfieldtheory,andthetheoreticalresultsarefoundtobeinaccordancewiththeexperimentaldata.ThenuclearchargeformfactorsforSnisotopesarecalculatedusingthephase-shiftanalysismethod.ItisshownthattheminimaofthechargeformfactorsshiftupwardandinwardwithanincreaseintheneutronnumberoftheSnisotopes.
简介:Thevacuumdiffusionbondingoftitaniumalloytotin-bronzehasbeenstudiedandthefeasibilityandappropriateprocessingparametershavebeeninvestigated.Themaximumtensilestrengthofthejointsis168MPa,andafirmjointisobtained.ThemicrostructureofdiffusionbondedjointhasbeenobservedbySEM.X-rayandEPMA,andthemainfactorsaffectingdiffusionbondinghavebeenanalyzed.TheintermetalliccompoundsTi2CuandTiCuwereformedneartheinterface.Thewidthandquantityoftheintermetalliccompoundincreaseswiththeincreaseofthebondingtime.Theformationoftheintermetalliccompoundsresultsinembrittlementofthejointandthepoorjointproperties.