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1.
SynthesisandCharacterizationofHeteropolyComplexesofIndiumwithMetal-centredUndecatungstateLigandsWuQingyin(吴庆银)(LiaoningUniver...  相似文献   

2.
Electrochemical and Kinetic Behavior of Ni(Ⅱ)Ion in DMF   总被引:2,自引:0,他引:2  
1IntroductionThenickelaloysandcomplexesarewidelyusedasmagnetic,optical,nuclearandsuperconductingmaterials[1,2].Manynickelcom...  相似文献   

3.
SynthesisandPropertiesofMolybdotungstogallicHeteropolyComplexesWuQingyinandSongYulin(吴庆银)(宋玉林)(DepartmentofChemistry,Liaoning...  相似文献   

4.
1 INTRODUCTIONItiswellknownthatthesolidlubricationmate rialscommonlyusedathightemperatures ,lowtem peraturesor(and)invacuumare graphite ,metallicsulphideMX2 (whereMstandsforWandMo ,XforS ,SeandTe) ,C60 andetc .Thegoodlubricationpropertyoftheseconventionalsolidlu…  相似文献   

5.
U.S.A.U.S.DepartmentofEnergyResearchinIntermetallicAlloysandComposites¥AlanL.Dragoo(DivisionofMaterialsSciencesOfficeofBasicE...  相似文献   

6.
1 INTRODUCTIONAsparticlereinforcedmetalmatrixcomposites(PRMMC’s)withimprovedspecificmodulus,spe cificstiffnessandstrengthhavebecomeavailableatreasonable prices,theybecomeattractivefortheautomotiveandaerospaceindustries primarilyasameansofsavingmassand ,he…  相似文献   

7.
1 INTRODUCTIONMassandchemicalchangetechniquesareusedinexplorationfields .The procedureutilizeselementswithhighdegreeofimmobilityinhydrothermalandassociatedinteractivefluid rocksystems .Theseele mentsnotablyZr ,TiO2 ,Y ,Sc ,Nb ,REEandAl2 O3 arehighlyimmobileduri…  相似文献   

8.
1 INTRODUCTIONMechanicalactivationiswidelyappliedinen hancingmetallurgicalprocess[1~ 3] andchemicalsyn thesis[4 ,5] .Sofaritisdifficultt  相似文献   

9.
1 INTRODUCTIONMagnesiumalloys ,especiallyMgmatrixcom posites ,areexcellentcandidatesforengineeringlightstructuralmaterialsbecauseoftheirhighspecificstiff nessandspecificstrength ,gooddimensionalstabilityandhighdampingcapacity .Thus ,Mgalloysareex pectedinad…  相似文献   

10.
Leaching hydrodynamics of weathered elution-deposited rare earth ore   总被引:2,自引:0,他引:2  
1 INTRODUCTIONTheweatheringcrustelution depositedrareearthoreisakindofrichrareearthresource[1] .Therareearthintheweatheringcrustelution depositedrareearthoremainlyexistswiththeion phasead sorbedonclayminerals[2 ] ,andcanbeleachedbyion exchangemethod[3] .Manyind…  相似文献   

11.
1 INTRODUCTIONRecentlyaluminum raremetalalloysattractmuchinterest.Metallicthermoreduction ,inwhichoxidesandchloridesofraremetalarereducedandin situalloyedbyaluminum ,hasthebestprospectinallproductionmethodsofaluminum raremetalalloys .Howeverthismethodismo…  相似文献   

12.
1 INTRODUCTIONNanometeralloypowdersareexpectedtopossessnovelproperties ,whichcannotbeobtainedin puremetalnanometerpowdersandconventionalbulkma terials[1,2 ] .Manyinvestigationsonthe preparationandpropertiesofnanometeralloypowdershavebeencarriedout.Severalte…  相似文献   

13.
1 INTRODUCTIONNanometeralloypowdersareexpectedtoexhibituniquecharacteristicswhichcannotbeobtainedforpuremetalpowdersandconventionalmaterials .Morerecently ,aseriesofstudiesonthepreparationtech niqueandpropertiesofnanometerpowderswerecar riedout,severalpr…  相似文献   

14.
INTRODUCTIONPowderinjectionmolding (PIM )fitsespeciallyformanufacturingcomplexshapedpartsofcertainal loyswithhighperformance[1 ] .However,duetotheagglomeratedirregularshape,fineparticlesize,highinnerporesandspecificsurfaceareaoftheinitialtungstenpowder,the…  相似文献   

15.
ProcessDevelopmentAspectsofAluminium-TitaniumMasterAlioysKrishnanT.S.;RajagopalanP.K;andBoseD-K.(Metallurgy.Division,BhabhaAt...  相似文献   

16.
1 INTRODUCTIONMolybdenumandtungstenshowverysimilarchemi calpropertiesowingto :1)theyarealllocatedattheⅥBcolumnintheperiodictableofelementsand 2 )the“lan thanidecontraction”makestheradiiofMo6+ andW6+(Zr4 + andHf4 + ,Nb5+ andTa5+ )almostequaltoeachother .Thisbringsabou…  相似文献   

17.
GDH─36型钢筋电渣压力焊机的工作原理及应用PrinciplesandApplicationsofBarElectroslagButtWelderModerGDH—36ShenyangNo2ElectricWeldingMachineWorks(l...  相似文献   

18.
RamanStudyofDefectsinSI-GaAsandSe-dopedEpitaxialLayerIrradiatedby10MeVElectronsWuFengmei,LiHaifeng,ChenWuming,ChengGungxuandH...  相似文献   

19.
1 INTRODUCTIONItiswellknownthatalloftheclassicalphysicstheoriesandmostofthemodernonesrespectivelyobeythethreesymmetryreferredtoasC (charge) ,P (parity)andT (time) ,andsomecombinedsym metrysuchasCPandCPT[1,2 ].LerchsandGross mannhaveusedafreemechanicalsystemtoil…  相似文献   

20.
luminothermicReductionofK2ZrF6forPreparationofAlZrMasterAloyRajagopalanP.K.,SharmaI.G.andKrishnanT.S.MaterialsProcesingDivis...  相似文献   

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