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1.
1 INTRODUCTIONRecently,superplasticitywasfoundinlargegrainedFe3AlandFeAlalloyswithgrainsizesof100~600μminourlaboratory[1,2].Itwasshown[3,4]thatlargegrainedFe3AlandFeAlalloysexhibitedalldeformationcharacteristicsofconventionalfinegrainsizesuperplas…  相似文献   

2.
1.IntroductionBoronisaveryeffectiveliquidphasesinteringadditivetoiron〔1-2〕.TheFeBCphasediagramshowsaternaryeutecticreactionoccurringat1097℃〔3〕.AdditionofFeBandFeCmasteralloypowderstoFeMoBCsinteredsteelscanactivatethesinteringprocessbyliquidpha…  相似文献   

3.
wasfoundthattheoxidationkineticsapproximatelyfolowstheparaboliclaw;theoxidescaleconsistsofAl2O3andalitleamountofFe2O3;andthe...  相似文献   

4.
1 INTRODUCTIONItisnowacceptedthatbothalloysbasedonFe3AlandonFeAlshowapeakintheirflowstressattesttemperaturesoftheorderof500~600℃[1-6].EarlystudiesontheFeAlalloysfailedtoshowsuchintermediatetemperaturepeaks,whichcannowbeexplainedthroughthelowtemperatu…  相似文献   

5.
ABSTRACTSFROMTRANSNFsoc(Chineseedition)Vol.3,No.4,Oct.1993A003—CalculationforRandom-FuzzyReliabilityofRockSlopewithPossessing...  相似文献   

6.
1 INTRODUCTIONTiAlbasedintermetallicalloyshavebeenexpectedasanewkindofaircraftandaerospacematerialtosubstituteforNi3AlandFe3Alalloysowingtotheirhightoughnessatelevatedtemperatureandlowdensity[1~3].Agreatnumberofresultsfromotherresearchersshowthatmi…  相似文献   

7.
1 INTRODUCTIONAmongtheintermetallics,ironaluminidesbasedonFe3AlandFeAlareattractiveforhightemperatureapplicationsduetotheirexcellentoxidationandcorrosionresistancesinbothoxidizingandcorrosiveatmospheres[1].Inaddition,theyexhibitlowdensitiesandreason…  相似文献   

8.
1.IntroductionOneofthemethodstoimprovetheperformanceofbondedNdFeBmagnetsistofabricatepowderswithhighanisotropy〔1〕.TheenergyproductsofNdFeBbondedmagnetsmadefromisotropicmeltspunpowdersare9~10MGOe〔23〕.Itislowerthanthatofthemagnetsmadefromanisotropic…  相似文献   

9.
1 INTRODUCTIONPolycrystallineNi3Alsuffersfromsevereintergranularbrittlenessatambienttemperature[1-4].Formanyyearsthisbrittlenesswasthoughttobeintrinsic,andthefindingofthepresenceofmicrocavitiesalongthegrainboundariesofNi3Albybothcomputersimulation…  相似文献   

10.
1 INTRODUCTIONSomeoftheorderedintermetallics,especiallythosebasedonaluminides,suchasFe3Al,possessmanyattractivepropertiesforstructuraluseatelevatedtemperaturesinharshenvironments[1-3].Ingeneral,thealuminidescontainsufficientamountsofaluminiumtoform…  相似文献   

11.
1 INTRODUCTIONItisconsideredthatthebrittleAl3TiintermetalliccompoundcanbeductilizedbychangingitstetragonalDO22structureintothecubicL12structureandconsiderablestudieshavebeenconductedtodeveloptheL12Al3TialloysbyalloyingwithFe,Mn,Cr,etc.However,ther…  相似文献   

12.
1INTRODUCTIONIronaluminidesbasedonFe3Aloferexcellentoxidationandsulfidationresistance,withalowermaterialcostanddensitythanst...  相似文献   

13.
1.IntroductionAluminumoxynitride(AlON)isoneofthecompoundsintheAlNAl2O3systemandhasmanydiversifiedapplications.Forexample,AlONstructureallowsforproductionofopticallytransparentpolycrystallinematerialandcaneliminateotherproblemsassociatedwithanisotrop…  相似文献   

14.
HighT_cHoBa_2Cu_3O_(7-δ)ThinFilmsDepositedon(100)Y_2O_3StabilizedZrO_2SubstratesbySputteringPengZhengshun,YangBingchuanandWan...  相似文献   

15.
ElectrocrystallizationMechanismofTungsteninMoltenKF-B_2O_3-K_2WO_4WenZhenhuanandLiGuoxun文振环,李国勋(GeneralResearchInstiiuteforNo...  相似文献   

16.
1 INTRODUCTIONTheclassicalworksoncontinuousrecrystallization(orrecrystallizationinsituorextendedrecovery)arethoseofHornbogenandK¨oster[1~3]onAlFeandAlCu.ItistakenforgrantedthattheZenerpinningduetosecondaryprecipitationisthemainreasonfortheoccurre…  相似文献   

17.
INTRODUCTIONTheR3(Fe,M)29(R=rareearth;M=Ti,V,Mn,Mo,etc)compoundsarenewlydiscoveredrareearthironintermetalics.Theyalmostexist...  相似文献   

18.
1.IntroductionThestudiesshowthat〔1〕,theconventionalphysicalpropertiesofAl2O3CbrickforBF,suchascompressivestrength,softeningtemperatureunderload,resistanceoftemperatureshocketc.,excelchamotte,highaluminabrickandphosphatechamotte;ithashighbulkdensity…  相似文献   

19.
ElectrodepositionofMolybdenuminMoltenKF-B_2O_3-K_2MoO_4LiGuoxunandFanDefang(李国勋)(范德芳)(GeneralResearchInstituteforNon-ferrousM...  相似文献   

20.
1.IntroductionTheabnormalthermalexpansionunderthetransientpulseheatingconditionwasfirstanticipatedbyoneoftheauthors〔1〕.Inthispaper,weintendtostudythemechanismoftheabnormalexpansionbehaviorofBi2Sr2Ca2Cu3O10(Tc=105K).Fig.1〔2,3〕showsthetypicalevidence…  相似文献   

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