英文板模擬國際會議-PPT復習過程

英文板模擬國際會議--PPT19thXXXXXXXConferenceOpeningceremonyDecember26,2016Shenyang,ChinaSponsor：NortheasternUniversityOrganizer：SchoolofmaterialsscienceandEngineeringKeynotespeechesAXXXXXXXXXXXXXXXDr.PLContentsIntroduction1Experiment2Resultsanddiscussion33Conclusions44Group3ChemicaltreatmentHardsurfaceandtoughinteriorMechanicalperformanceandwear/corrosionresistanceNitridingprocesses>500℃forlongduration(20~80hours)NitridingironIntroductionGroup3ExperimentGroup3SMATTwoironplates(7*100*100mm)withapurityof99.95weightpercent(wt%)OnewastreatedbySMAT,anotheronenot.Boththeuntreatedandtreatedsampleswerenitridedinflowing,high-purityammoniagas(NH3)at300℃for9hoursResultsanddiscussion

Group3Fig.1.cross-sectionalobservationsof(A)anoriginalcoarse–grainedFesample(B)aSMATFesampleafternitridingat300℃for9hours(c)Nitrogenconcentration(D)microhardnessalongthedepthfromthetopsurfacelayerintheoriginalFesampleResultsanddiscussion

Group3Fig.2.(A)adark-fieldTEMimage(B)thecorrespondingelectrondiffractionpatternforthecompoundlayer(C)ATEMimageforthemicrostructurebeneaththecompoundlayer(D)AnXRDfortheSMATFesampleandtheoriginalsampleConclusions

Group3Similarly,othersurfacechemicaltreatmentsthatarecontrolledbythediffusionofforeignatomsandareusedinindustrytoimprovetheperformanceofengineeringmaterialscanbealsobeenhancedbySMAT.WefoundagreatlyenhanceddiffusivelyofchromiumintheSMATFeat350℃,whichisabout300℃to400℃lowerthantheconventionaltreatmenttemperatureThisenhanceprocessingmethoddemonstratesthetechnologicalsignificanceofnanomaterialsinimprovingtraditionalprocessingtechniquesandprovidesanewapproachforselectivesurfacereactionsinsolids.123CompanyLogoKeynotespeechesBXXXXXXXXXXXXXDr.YDContentsIntroductionExperimentalResultsanddiscussionIntroductionPorousceramicslowbulkdensity、lowthermalconductivity（lessthan0.2W/mK）、heatresistance、highporosityandhighsurfacearealeachingmethod、gelcasting、reaction-bondingtechnique、starchconsolidationmethod、gelfreezedryingandfoam-gelcasting……PropertymoldingmethodExperimental

Materials

PreparationprocessingAnindustrialgradefusedmullitepowderCristobalite（SiO2）Sodiumcarboxymethylcellulose（CMC)Sodiumdodecylsulfate(SDS)Mullitepowder,cornstarch,CMC,distilledwateranddispersantSintering↓Ballmilling20minFoamingsuspensionConsolidation(75℃for1h)FoamingofsuspensionsResultsanddiscussionMicro-structurePorosityFoamingofsuspensions

HighersolidloadingresultsinlargerviscosityandlowerfoamingvolumeViscosityofthefoamedsuspensionismuchhigherthantheoriginaloneatlowrotationalspeed.

12PorosityWhenthetemperatureincreased，theporositydecreasedAtthesamesinteringtemperaturelowsolidloadingsamplehasahigherporosity.12MicrostructureThetwosamplesexhibitalmostasameporemorphologywhichisatypicalresultofdirectfoamingmethod.Itcanalsobefoundthathigherporositysamplecontainsmorelargeporesthanlowerone.Theresultindicatesthattheporousmulliteceramicspreparedbythismethodexhibitasimilarporemorphologyandcontainmorelargeporeswithhigherporosity.62.5wt%67.5wt%Conclusions123Theporosityofporousmulliteceramicscanbevariedfrom73to86vol%byadjustingsolidloadingofsuspensionandsinteringtemperature.Porousmulliteceramicscomprisedahierarchicalmicrostructureoflargesphericalporesandsmallporesoninternalwalls,andpossessedalargeraverageporesizewithhigherporosity.Thesesamplespreparedbyfoamingandstarchconsolidationhavelowthermalconductivityandmeanwhilekeepsuitablemechanicalstrength.19thXXXXXXXConferenceClosingceremonyDecember26,2016Shenyang,ChinaSponsor：NortheasternUniversityOrganizer：SchoolofmaterialsscienceandEngineeringCompanyLogoGroup3Chair

AKWelcomespeechLMLPKeynotespeaker