凝胶注模制备金属多孔材料的分析

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1、华侨大学硕士学位论文IIAbstractAbstractPorousstainlesssteel,possessingdistinctivecharacteristics–efficientheatdissipation,highspecificstrengthandgoodairpermeabilityisastateoftheartrawmaterialwithhighpotentialandversatility.Itiscommonlypreparedbythemethodsascastingprocess,powdermetallurgy,metaldepos

2、ition,etc.Gel-castingisaformingtechniquethatissuitableforformingproductswithcomplexshapeandvariousdimensions.Thepaperputsforwardatechniquebycombininggel-castingandfoamingprocessforrapidmanufacturingofporousstainlesssteelandstudiesitseffectiveness.Firstly,metalslurryofdifferentcomposition

3、sispreparedwiththeadditionoffoamingagent.Duringthegel-castingprocess,poresforminthegreenbody.AfterdegreasingprocessandMicrowavesintering,porousstainlesssteelproductscanbepreparedwithinashortturnaround.Thepaperprimarilyfocusesontheporousstainlessgreenbodypreparationandsinteringprocessbyus

4、ing316Lstainlesssteelpowder.(1)Tomoldaporousstainlessgreenbodywithhighsolidloadingandhighporosity,theexperimentfirstlycomparestheimpactofthegranularityofmetalpowderandshapeofpowderonthesolidloadingofslurrytoidentifythecorrelation.Basedontheexperimentalcorrelation,slurryofupto65%solidload

5、ingwasmade.Intheexperiment,HEMAservesasthemonomer;DEGDAservesasthecrosslinkingagent;PropyleneGlycerinservesasthesolventandapremixedsolutionofthese3chemicalsisprepared.Throughvariouscompareandcontrastexperiments,theoptimumportionmixofpremixedsolutionisidentified.Inlightoftheuniquefeatureo

6、fnon-aqueousgel-castingprocess,ammoniumbicarbonateischosenasthefoamingagent.Subsequentcontrolexperimentsrevealhowtheproportionoffoamingagentimpactstheporosityandthephysicalpropertiesofporousstainlesssteel–Yieldingafinalproductwithbendingstrength>10MPa.Thepaperalsostudieshowthetemperature

7、ofgel-castingprocessaffectstheporosityandcross-linkingreaction.(2)Thisstudyapplymicrowaveheatingtechnologyinthemanufacturingofporousstainlesssteel.ThemajoradvantagesofmicrowaveusedformaterialIII华侨大学硕士学位论文processingarerapidheattransfer,volumetricheatingandselectiveheating,