简介：Abstract:Extrusionisanefficientmeasuretoimprovethetextureandphysic-chemicalpropertiesofbrownrice.Thepolynomialdegreetwomodelofextrusiontechnologicalparametersandgelatinizeddegree,waterabsorptionindex,watersolubleindexandmoisturecontentofextrudedmatterwasobtainedbymethodsofsinglefactorandresponsesurfacemethodology,R2=0.9649,0.8745,0.9079,0.8677.Theoptimaltechnoiogica!parametersofbrownriceextrusionwerefiguredoutasfollows:moisturecontentofbrownrice,11.42%,speedofscrew,30rpm,feedingspeed,and20rpm.
简介：Amagneticandtemperaturefield-coupledmathematicalmodelisproposedtocalculatetheinductionheatingprocessofadiscardsubstitutionblockforbillethotextrusionprocess.Themathematicalmodelisvalidatedbycomparingsimulationresultswithtemperaturemeasurementsrecordedduringphysicalmodeling.Basedonsystematicalanalysisofcalculationresults,aquantitativesawtoothinductionpowercurvewasproposedtorealizetheaimofachievingthebestdistributedtemperaturefieldintheblockwithintheshortestinductiontime.
简介：聚苯乙烯(PS)/triphenyl磷酸盐(TPP)composites被暂停聚合准备并且融化挤出，和火焰retardance和机械性质的比较研究被执行。结果比为获得PS/TPP的好dispersity融化挤出证明暂停聚合是一种更好的技术合成。TPPnanoparticles，是在尺寸的约50nm，被暂停聚合同质地并且一致地在一步舞在PS矩阵驱散。然而，PS/TPP合成部分被聚结，不规则地展出塑造了微米规模粒子由于融化挤出。与melt挤出相对照，由从21.8%增加到22.6%的暂停聚合的PS/TPPnanocomposite的有限的氧索引(LOI)，和点火(TTI)的时间增加了12.3%，山峰热版本率(PHRR)在8.5%减少了，并且全部的热版本(THR)在11.0%减少了。由暂停聚合的PS/TPPnanocomposite的机械性质也增加了。张力的力量，在裂缝的延伸，和曲折力量分别地增加了36.4%，8.5%，和108%。
简介：Toexploretheapplicationofsevereplasticdeformationforgrainrefinementinsteelproduction,anewmethodcalledcontinuousfrictionalangularextrusion(CFAE)wasappliedtorefinethegrainofinterstitial-freesteel.Thedeformationwascarriedoutatroomtemperatureandindividualsheetspecimenswereprocessedindifferentnumberofpasses.Anoverallgrainsizeof200nmwasachievedafter8passesandtheproportionofhigh-angleboundariestothetotalboundarieswasmorethan60%.ThroughthecharacterizationofhighresolutionEBSD,X-raydiffraction(XRD)andhardnesstesting,thispaperdiscussedtheevolutionofmicrostructuresandtexturesduringdeformationandexploredthedevelopmentdirectionofthemethod.
简介：AbstractObjective:To review current literature and experience with Gore-Tex® implant extrusion following medialization thyroplasty, as well as to report the unique case of Gore-Tex® implant extrusion following revision medialization thyroplasty.Methods:Review of existing literature and description of personal experience with unique case of Gore-Tex® implant extrusion following revision medialization thyroplasty.Results:Review of existing literature found no prior reported cases of Gore-Tex® implant extrusion following revision medialization thyroplasty. Risk factors for implant extrusion include the pressure of the implant on insertion and the inability to secure the implant. Cases of implant extrusion can be managed operatively via an endoscopic or via an external open approach.Conclusion:This is the first reported case of Gore-Tex® implant extrusion following revision medialization thyroplasty. Careful consideration should be given in revision medialization thyroplasty as additional implant material may cause increased pressure, a risk factor for implant extrusion.
简介：Anewmethodusingleadcoatedglassfibertoproducecontinuouswireforbatterygridofelectricvehicles(EVs)andhybridelectricvehicles(HEVs)wasintroduced.Underequalflow,boththemaximumandminimumtheoreticalvalueofgapsizewerestudiedandestimationequationwasestablished.Theexperimentalresultsshowthatthegapsizeisakeyparameterforthecontinuouscoatingextrusionprocess.Itsmaximumvalue(Hmax)is0.24mmandtheminimumone(Hmin)is0.12mm.Atagapsizeof0.18mm,themaximumofmetalextrusionperunitoftimeandoptimalcoatingspeedcouldbeobtained.
简介：Semicontinuousequal-channelangularextrusion(SC-ECAE)isanovelsevereplasticdeformationtechniquethathasbeendevelopedtoproduceultrafine-grainsteels.InsteadofexternalforcesbeingexertedonspecimensintheconventionalECAE,drivingforcesareappliedtodiesinSC-EACE.Thedeformationofinterstitial-free(IF)steelwasperformedatroomtemperature,andindividualspecimenswererepeatedlyprocessedatvariouspasses.Anoverallgrainsizeof0.55μmwasachievedafter10passes.DuringSC-ECAE,themaintexturesofIFsteelincluded{111}<110>,{110}<112>,{112}<111>,{110}<111>,and{110}<001>Atanearlystage,increasingdislocationsinducenewtexturesandincreaseintensity.Whenthedeformationcontinues,low-angleboundariesareformedbetweendislocationcellbands,whichcausesomedislocationcellbandstochangetheirorientation,andtherefore,theintensityofthetexturesbeginstodecrease.Aftermorepasses,theintensityoftexturescontinuestodecreasewithhigh-angleboundaries,andthesub-grainsindislocationcellbandscontinuouslyincrease.Thepresentstudyreportstheevolutionoftexturesduringdeformation;thesewereexaminedandcharacterizedusinghigh-resolutionelectronbackscattereddiffraction(EBSD)inafieldemissionscanningelectronmicroscope.Themechanismsoftextureevolutionarediscussed.
简介：Inthisstudy,Almatrixcompositesreinforcedby7.5and15vol.%B4CparticlesandalsomonolithicAl（AlwithouttheB4Cparticles）wereproducedbywetattritionmillingandsubsequenthotforwardextrusionprocesses.Themicrostructureofthecomposites,evaluatedbyscanningelectronmicroscopy（SEM）,showedthattheB4CparticleswereproperlydistributedintheAlmatrix.MechanicalpropertiesoftheAI/B4CcompositesandmonolithicAlwereinvestigatedbytensile,wearandhardnesstests.TheresultsrevealedthatwithincreasingcontentofB4Cparticles,thetensilestrengthandmicrohardnessofcompositesincreasedbuttheelongationdecreased.Inaddition,thetensilestrengthandmicrohardnessofcompositesampleswerehigherthanthoseofmonolithicAl.ThedensitymeasurementsrevealedthatthedensityofcompositesdecreasedwithincreasingcontentoftheB4Cparticles.
简介：Polyvinylidenefluoride(PVDF)hollowfibermembranespreparedfromspinningsolutionswithdifferentpolyvinylpyrrolidone(PVP)contents(1%and5%)atdifferentextrusionrateswereobtainedbywet/dryphaseprocesskeepingallotherspinningparametersconstant.InspinningthesePVDFhollowfibers,dimethylacetamide(DMAc)andPVPwereusedasasolventandanadditive,respectively.Waterwasusedastheinnercoagulant.Dimethylformamide(DMF)andwater(30/70)wereusedastheexternalcoagulant.Theperformancesofmembraneswerecharacterizedintermsofwaterflux,soluterejectionforthewetmembranes.ThestructureandmorphologyofPVDFhollowfiberwereexaminedbyBETadsorption,dry/wetweightmethodandscanningelectronmicroscopy(SEM).ItisfoundthattheincreaseinPVPcontentandextrusionrateofspinningsolutioncanresultintheincreaseofwaterfluxanddecreaseofsoluterejection.Theimprovementsofinterconnectedporousstructureandporesizeareinducedbyshear-thinningbehaviorofspinningsolutionathighextrusionrates,whichcouldresultintheincreaseofwaterfluxofhollowfibermembranes.Theincreaseofextrusionratealsoleadstotheincreaseofmembranethicknessduetotherecoveryeffectofelasticpropertyofpolymerchains.
简介：基于FE，模拟被建议预言热短小裂缝和表面的出现的一个损坏预言方法在液体固体挤出过程裂开。这个方法综合批评温度标准和可锻的损坏模型，它被用来预言热短小裂缝和表面的开始分别地产品击碎的Cockcroft与Latham。有热转移以及可锻的损坏的变丑的Acoupling模拟被执行在Csf/AZ91Dcomposites的损坏行为上调查挤出温度和挤出速度的效果。半固体地区向变丑地区逐渐地移动，穿孔机下降，这被结束。在出口的温度上升的振幅从温度在给定的穿孔机排水量在不变的挤出期间随挤出速度的增加增加的起始的营舍死。以便在composites的早期的融化温度以外阻止产品的表面温度，批评挤出速度随挤出温度的增加被减少，不那样，热短小裂缝将发生。最大的损坏价值与增加挤出速度或挤出温度增加。理论结果由Deform获得了?-2D模拟与实验同意很好。
简介：TheeffectoftitaniumadditiononthemicrostructureandmechanicalpropertiesofbrassCu40Znhasbeenstudiedviathepowdermetallurgy(P/M)route.Thewater-atomizedCu40Zn—1.0wt%Tialloypowderwasconsolidatedatdifferenttemperaturesintherangeof400—600℃usingsparkplasmasintering(SPS)andhotextrusionsubsequently.Resultsshowthatthesuper-saturatedsolidsolutiontitaniumelementinrapidlycooledbrassCu40Znpowdercreatedhighchemicalpotentialforaprecipitatereaction,showingsignificantgrainrefinementeffectsontheconsolidatedCu40Znmatrix.Consequently,excellentmechanicalpropertieswereobtainedbyprecipitationhardeningandworkhardeningaftersinteringandextrusion,withyieldstrengthof390MPa,ultimatetensilestrengthof617MPa,andVickersmicro-hardnessof192HV,whichare28.7%,23.4%,and23.9%highervaluesthanthoseofextrudedCu40Znbrass,respectively.
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![Structural and Mechanical Properties of A]/B4C Composites Fabricated by Wet Attrition Milling and Hot <b style='color:red'>Extrusion</b>](/image/thesis15 "Structural and Mechanical Properties of A]/B4C Composites Fabricated by Wet Attrition Milling and Hot <b style='color:red'>Extrusion</b>")
