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1.
Bond strength of W-Cu/CuCr integrated material 总被引:3,自引:0,他引:3
1 INTRODUCTIONW Cu/CuCrintegratedmaterialnowisusedaselectriccontactmaterialinhigh powerswitcher[1] .TraditionalprocessofbondingW CucompositeandCuCralloyiswelding .BecauseweldingdefectsoftenappearatW Cu/CuCrweldinginterface ,theinter facebondislowandunstable[2… 相似文献
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1IntroductionMoreandmorecarbonatemeltshavebeenemployedtoserveaselectrolyterecently,especiallyinmoltencarbonatefuelcells(MCFC).MCFCisbelievedtobeoneofthemostpromisingnewenergyconversiondevicethatconvertschemicalenergyinfossilfuelsintoelectricity[1~3].MCFCt… 相似文献
3.
J.Y. Zhang Z.Y. Fu W.M Wang H. Wang X.M. Min State Key Lab .of Advanced Technologyfor Materials Synthesis Processing Wuhan University of Technolo gy Wuhan China 《金属学报(英文版)》1999,12(4):395-400
1.IntroductionWettabilitybetweenceramicandmetalisaveryimportantaspectoftheresearchanddevelopmentofCeramic/MetalComposites(CMC),whichhasagreateffectonthemicrostructureandpropertiesofCMC.Howevertheclassictheoryandmethoddidn’tshowtheinnerconnectionofco… 相似文献
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Q.R.Zhang Y.G.Li Z.Fang Department of Chemistry Central South University of Technology Changsha China 《金属学报(英文版)》1999,12(5):1159-1163
1.IntroductionTheactivitiesofMgCl2intheLiClMgCl2KClandCaCl2MgCl2NaClmoltensaltelectrolytesareanimportantparametertotheelectrolyticproductionofmagnesium.LiClandKClcanobviouslyimprovethepropertiesoftheelectrolyticsolution.NaClandCaCl2arethemajorcom… 相似文献
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1-IntroductionCarbonisaprevailingresidualimpurityinundopedsemiinsulating(SI)GaAscrystalsgrownbytheliquidencapsulatedCzochralski(LEC)technique,anditpredominantlyoccupiesthearsenicsiteasacceptorCAs.Sincethemassofcarbonatomismuchlighterthanthatofars… 相似文献
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1 INTRODUCTIONCuCralloysareimportantcontactmaterialsforvacuuminterruptersandarewidelyusedforhighvoltageapplicationsbecauseoftheirconsiderablehighinterruptingabilityandhighvoltagewithstandingstress[1].Presently ,themainmethodsofpreparingCuCralloysinclude… 相似文献
7.
Study on the measure to improve the arc stabilization in smaller current welding for the variable polarity GTAW power source 总被引:2,自引:0,他引:2
0 IntroductionInthealternativecurrent(AC)arcwelding,whentheelectrodepolaritychangesperiodically,thearcextinguishesandrestrikes,whichleadstheACarcislessstablethanDCarc[1].Tillnow,thereisnotageneralacceptedtheorytoexplaintheACarcrestrikingphenomenonofnonthe… 相似文献
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H. Q. Ru) N. Zhang) P. Z. Yu) X. D. Sun)) Northeastern University Shenyang China) Shenyang University Shenyang China 《金属学报(英文版)》1999,12(5):1175-1179
1.IntroductionSiChasbeenwidelyusedasspecialrefractories.Withdifferentbondingphases,SiCrefractoryscanbeclassifiedintooxide/SiC,Si3N4/SiC,Sialon/SiCandSiC/SiCsystems.TheSialon(Si6zAlzOzN8x,0<z<4.2)/SiCsystem,duetoitsbetterphysicalandchemicalpropertie… 相似文献
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J.B. Li) J.P. Niu) X. Wang) ) College of Machinery Shenyang University Shenyang China) BenxiIron Steel Company Benxi China 《金属学报(英文版)》1999,12(4):705-707
1.IntroductionNiCrMoalloycastironisoftenusedtomakerollers.AddingSiCparticlesinittoformcompositecanimproveitswearresistanceandimpactstrengthproperties.ThismainlydependsonthestateofdistributionofSiC,SiCfactorandthecombinationstrengthbetweenthetwos.Toi… 相似文献
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H.F.Yu ) P.Q.Liu ) W.H.Wang ) ) Department of Materials Science Engineering Shenyang Architectural Civil Engineering Institute Shenyang China ) Department of Airport CAAC Eastnorth Management Shenyang Chin 《金属学报(英文版)》1999,12(5):1038-1040
1.IntroductionInthescienceofcements,oneofthemostexcitingareashasbeenthatofMOC,MOChavebeenstudiedextensively〔14〕.However,thereisnopublisheddataontheuseofsilicafume.ItisknownthattheabundenceofMOCresourceinChinahasledtosomeappliedresearchstudiesonthisc… 相似文献
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1 INTRODUCTIONCarbonfiberreinforcedcomposites (C/Ccom posites)areimportantforengineeringandscientificapplicationsinaerospaceindustrybecauseoftheiru niqueproperties .Currently ,besidesbeingusedasaircraftbrakes ,theyarealsousedasrefractorymate rial,corrosionr… 相似文献
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P. Zhong B. Ling B. Z. Gu Beijing Institute of Aeronautical Materials Beijing China 《金属学报(英文版)》1999,12(4):621-625
1.Introduction23NiCo,CoNialloysteel,strengthenedbyC,Cr,andMo,hasanoutstandingcombinationofhighfracturetoughnessandhightensilestrength.Unlikeotherhighstrengthsteels,suchas4340and300M,23NiCoislowC,FeNilathmartensticalloywhichattainsitspropertiesthrou… 相似文献
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Liquid separation behavior of Cu-Co alloy during isothermal process at high temperature 总被引:1,自引:1,他引:0
1 INTRODUCTIONIn 195 8Nakagawafoundthatthereexitsametastablemiscibility gap (MG )inCu Coalloys .Thatis ,whenCu CoalloyissupercooledtoMG ,twoliquidphases ,namelyCo rich phaseandCu richphasewillform[1] .Thisunexpected phasetransfor mationwilcausetheinhomogeneousmicros… 相似文献
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1 INTRODUCTIONTheelectrolytesolutionsofCuCl2 ,NiCl2 ,Co Cl2 ,ZnCl2 ,CdCl2 ,FeCl2 ,HCl,NaCl,KCl,CaCl2 ,MgCl2 ,BaCl2 ,etal,wereofteninvolvedinthehy drometallurgicalprocesses .Thethermodynamicprop ertiesofaqueoussolutionsoftheelectrolytesareveryimportanttoextractivemetal… 相似文献
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1 INTRODUCTIONThecontinuouscastingofaluminumisthefoun dationoftheelectromagneticcasting (EMC) ,whichbeganfromthedirectchillcastinginventedbyAlocaCorporationandVlwCorporationin 1 935[1].TheprincipleofEMCwasfirstlydescribedbyGetselevandhisco workersin 1 960 [2 ].Andt… 相似文献
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1 INTRODUCTIONOntheviewofgeometry ,weathertheshapeisperfectdependsuponchangeofcrownoccurredintherollingprocess.Ifthestretchingoftherollingstockintherollingprocessisneglected ,geometricaldepen denceofperfectshapecanbeexpressedas[1 ] :Ch =hHCH ( 1 )where Chisthe… 相似文献
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FU Guang yan 《中国有色金属学会会刊》2000,10(3)
1 INTRODUCTIONManystructuralmaterialsforhightemperatureapplicationscontaintwoormoremetallicphases,suchasNiorCobasesuperalloys,andhavedifferentcorrosionbehaviorswithrespecttothecommonsinglephasealloy[1].CuCralloysareidealsystemstostudyhightemperaturecorr… 相似文献
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Stress corrosion cracking of brass in ammonia solution 总被引:1,自引:0,他引:1
1 INTRODUCTIONTheTEMobservationsshowed[1~ 4 ] thatthecor rosionprocessitselfcanfacilitatedislocationemissionandmotionduringstresscorrosioncracking(SCC)ofbrass,310stainlesssteel,andTi3Al Nb .Nano crackofSCCwillnucleateinadislocationfreezone(DFZ)onlywhenthecorros… 相似文献
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1 IntroductionCopperalloyshavebeenwidelyusedinmarineengineeringandpowerindustryandotherindustryareasbecauseoftheirhigherstrengthandgoodcorrosionresis tance[1~ 3].Thetypicallyandwidelyusedcopperalloysarebrassandcupronickel ,inwhichCu∶Znisequalto 70∶3 0andCu∶N… 相似文献
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1 INTRODUCTIONSulfurdistributionincokingprocessincludestwoparts .OnepartisgoingintoCOGasH2 S ,CS ,COSandC2 H2 SH .TheotherpartisresidualincokeasFeS ,CaS ,S2 andsoon .Traditionally ,theremovalofsulfurofCOGisbysprayingammoniawaterintohotcoalgastoformammoniumsulfat… 相似文献