Abstract:Theresearchonceramicmatrixcompositesandtheirapplicationsinaerospacefieldwerediscussedintermsoftheiradvantagesandfeatures,
fabricationmethods,domesticandforeignresearchprogress,
difficultiesandkeytechnologiestobesolved,andfuturedevelopmenttrendsanddirections

Abstract:Basedonthecrystalstructureofsiliconnitride,theexcellentpropertiesofsiliconnitrideceramicweredescribed,
andthenewprogressofwave-transparentsiliconnitridefibersandcompositeswasillustrated.
Inaddition,thedrawbacksofthepresenthightemperaturewave-transparentmaterialswerelisted,
anddevelopmentofsuchmaterialswasalsoreviewed.

Abstract:Thepresentreviewoutlinestherecentprogressofrigidceramicinsulationtile,ceramicfibrousfeltandlight-
weightablativematerials.Thecompositions,structures,performanceandapplicationsof
thesematerialsonhypersonicflightvehiclesareelucidatedindetailandfuturedevelopmentsofthermalinsulationmaterialsarealsohighlight
d.

Abstract:Thermalconductingmechanismofpolymer-basedcompositeisintroduced,summarizesthe
factorsthatinfluencethethermaleffectissummarized,andthefutureresearchdirectionofthermalconductivecompositematerialsispredicted.

Abstract:Asakeymaterialofhighthrust-weightratioengine,P/M nickel-basedsuperalloyhasbeen
mainlyappliedinthefieldsofaeronauticsandastronautics.Therecentresearchachievementsandtheproblemsconcerningcomposition,
powderpreparation,forming,sinteringandpostheattreatmentofP/Mnickelbasedsuperalloyarereviewed.
Finally,somesuggestionsforthedevelopmentofP/Mnickel-basedsuperalloy
areputforward.

Abstract:Structuralhealthmonitoring(SHM)achievestechnologicalleapsinthedesignandoperation
ofengineeringstructures.CompositematerialsincorporatingSHMsystemsenablethedesignandmanufactureoftailoredsmartstructures.
Thispapermainlyfocusesontheirapplicationtoaircraftasameansof
highlightingtheissuesthatfaceSHMincompositestructures.IncorporationofSHMhasthepotentialtoreducethrough-
lifecostsbytheadoptionofconditionbasedmaintenanceandtoreduceoperatingcostsbythe
designofmorestructurallyefficientaircraft.Thepaperaddressesissuesinvolvedinthedesign,certification,
manufactureandthroughlifesupportofsuchstructures.Criticalareasofdevelopmenthavebeenidentifiedto
enabletheimplementationofSHMinfuturecompositeaircraftstructures.

Abstract:Incrementalformingtechnologyisaveryimportantpartofpreciseshapingtechnology.Incrementalformingtechnologyasanewtypeofprecisionplasticformingincludesmanycharacteristicssuchas
smalltonnage,localloading,dieless (orflexibledie)andunconstrained,whichcanformed morecomplex
shapepartwithoutspecialdieandalsohassomefavorablefeaturessuchassmallformingloadandhighflexibility.
Thistechnologyisparticularlysuitableformulti-varietyandsmall-batchproductionofparts,sothat
moreattentionsarepaidtoitbytheinternationalcommunity.Thisarticlefocusesontheformingprinciple,
formingtechnology,formingequipment,researchstatusandotherresearchresultsofthisnewincremental
formingtechnologyinfourtypicalformingprocess,whicharein-planebendingunderunequallocalloadingincrementalforming,
singlepointincrementalforming,multi-pointflexibledieformingandhigh-speedcold
roll-beatingforming,soastopointoutahelpfuldirectionforfurtherresearch.

Abstract:Multi-layerednanoporous-insulationmaterialswerepreparedwiththinnanoporous-insulationmaterials
andmetallicfoils,Insulationperformanceofdifferentstructuresweretested.Theresultsindicatedthatusingmoremetallicfoillayers,
placingstainlesssteelinlowtemperaturezone,orusingaluminumfoilinsteadofstainlesssteelfoilinlow
temperaturezoneandtestingathighertemperaturewereofadvantagetoinsulationperformance.

Abstract:Cross-linkedPVCfoamplasticwaspreparedbyboilingfoamingmethod.InfluenceofPVC
pasteresinonproductsobtainedfrompastingprocess,moldingprocess,foamingprocessandcompression
propertyoffoam wasstudied.Theresultsshowthatappropriatepasteviscosityis4to9Pa·s.K-valueof
PVCpasteresinislargerorbeingalkalineofPVCpasteresincanpreventPVCdegradationin molding
process.BeingalkalineofPVCpasteresincanacceleratefoamingreaction,willbenefittoobtainlowdensity
foamandreducefoamingtime.WithK-valueofPVCpasteresinincreasing,compressionpropertyoffoamincreased.
WhenK-valueisextremelybig,cellularsizeoffoam becomebiggerandcompressionstrengthreduce,
appropriateK-valueis70to80.

Abstract:TheamphiphilicrandomcopolymersofP(S-VP)wassynthesizedviaatomtransferradial
polymerization(ATRP),usingstyrene(St)and4-vinylpyridine(VP)asmonomers,Tris(2-dimethylaminoethyl)
amine(Me6TREN)asligand,andusingCuClascatalyst.Thestructureoftheamphiphilicrandom
copolymersarecharacterizedbyGPCand1HNMR.TheresultsshowthattheGPCissinglepeaks,Mnand
PDIis7153,1.217.Theratioofunitsof4-vinylpyridineandstyreneinchainis1∶1.15.Usingtheamphiphilic
randomcopolymerstomodifythesurfaceofMWNTs,thedissolubilityofMWNTsareimprovedinthesolventofwater,
chloroformandacetone.

Abstract:Theinfluenceofdifferentheattreatmenttemperatureonthemechanicalpropertiesandthermalshockresistanceofneedlingcarbon/
carboncompositeswasinvestigated.Theexperimentalresultsshow
thattheinterlaminarshearstrengthandtensilestrengthdecreaseswithincreasingheattreatmenttemperature,
butbreakingstrainandresistancetothermalshockincreases,theneedlingcarbon/carboncomposites
treatedat1800℃ haschampionperformance.

Abstract:AnovelmodifiedSiBCNprecursors(SiBCN/PMSA)wereobtainedbyblendingSiBCN with
polymethylsilylacetylene(PMSA)ascross-linkingagent.ThestructureofthemodifiedprecursorswascharacterizedbyFT-
IR.Thecuringbehaviorofthemodifiedprecursorandthethermalstability,oxidativeresistanceoftheceramicresidueswereevaluatedbyDSC,
TGA,XRDandmufflefurnacescalcinationmethods.
TheresultsshowthatPMSA wascompatiblewithSiBCNprecursor.Theceramicyieldsincreasedsignificantlyduetothecross-
linkingreactionbetweentheC≡CbondsofPMSAandtheSi-HbondsofSiBCNat
lowtemperature.Thehighestceramicyieldwas84.85%.Theceramicresiduesweredenseandexhibitedgood
oxidativestabilityatelevatedtemperature.

Abstract:Thepackaluminizedandsiliconaluminizedat620℃for6hoursonTi-alloysheetfabricated
byelectronbeamphysicalvapordeposition (EB-PVD)techniquewasinvestigated.Surfacesandcross-sectionsofthealuminizedspecimenswerestudiedbyscanningelectronmicroscopy(
SEM).Phaseidentification
oftheoxidescalewasperformedbyX-raydiffraction (GAXRD)andenergydispersiveanalysisofX-rays (EDAX).Theresultsshowthataluminizingcouldbecarriedoutat620℃.ThephaseconstructionofthealuminizedcoatingisAl3Ti.
However,asAl3Tiphaseisbrittle,itiseasytocreatecrackinthecooling
processduetotheheatstress.AfterAl-Sico-infiltrationat620℃,thephasesofthecoatingareAl3Tiand
Ti5Si3.Theinterfaceisclearbutunsmooth.

Abstract:Buttweldprocessoffrictionstirweldingforthinslabarestudiedinthispaper,2524-T3
plateareselectedastestingmaterials.Thejoiningprocessisoptimizedtoobtainthewindowofweldprocess
andthebestprocessparameters.Thebuttweldproducedinoptimizedprocessparametershaveanexcellent
appearance,asthedeformationandthethicknessreductionofweldarelittle;X-rayinspectionresultsshow
theinnerqualityofweldsisgood,andnodefectsarefoundinthepicture;metallographicanalysisindicates
thetextureofweldincross-sectionisuniformanddense;mechanicalpropertytestresultshowsthatthe
meantensilestrengthofbuttjointis397MPa,whichisthe90.4% ofbasemetal’stensilestrength.

Abstract:Ancomputationmodelisdevelopedthatsmallyardstickandshallowtransientelectromagnetic
method(TEM)isputforwardtodetectcomposites.Themodelissimplifiedalongameasuringline,and
transientelectromagneticresponseofeverymeasuringpointisobtainedthroughHankeltransformation,then
alldataareconvertedintoaprofileofcomposites.Theresultshowsthatthecomparisonbetweenanomaly
andspecimenflawsshowsanexcellentagreement,andcomputationalprecisionimprovesalongwiththereductionofthespacebetweenmeasuringpoints.
Finally,thecomputationmodelisverifiedbyexperiments.

Abstract:Thecarbon/carboncompositesringpreparedbychemicalvaporinfiltration(CVI)withneedled
feltaspreformisanisotropy.Theircompressivepropertiesandfracturemechanismofthreeprincipaldirectionswerestudied.
Theresultsshowthattheaxialcompressivepropertiesaresimilartothehoopcompressivepropertieswithhighercompressivemodulus.
Theneedledfeltcarbon/carboncompositesexhibitquasiductilefracturebehaviorunderradialcompression.
Manysmallfragmentsoffibersandmatrixcarbononthe
fracturesurfaceoftheradialcompressivespecimensareobservedandthefailuremodesareshearwithmatrix
crushed.Underaxialandcircinalloading,thecompositesexhibitcatastrophicfailurebehaviorandthespecimensaredestroyedbydelaminationandsplitting.

Abstract:Thepaperdiscussthenoise,theproductsize,theparameterandthepositionsaffectsontheCTvalue
andconstitutesanaloglinesandanalogexpressionsoftheCTvalueanddensitybyC/Ccompositesample.Theresult
indicatesthenoise,theproductsize,theparameterandthepositionhavelittleaffectoftheCT value.Thetextileand
compositeofC/CmaterialanalogexpressionoftheCTvalueanddensityareP=(T+793)/659andP=(T+100)/
860,sorealizetheCTvaluetoquantifythedensityofC/Ccompositematerial.

Abstract:Theobjectiveoftheworkistofindouttheoptimalrangeofchemicalmillingliquorcomposition,
whichcanleadtoastablechemicalmillingundercutrateandadecreaseinmillingthicknessdifference.
Thisworkisconductedtomeasureandcomparethemillingundercutandribevennessthroughagroupof
experimentswhichvaringthemainmaterialcompositioninchemicalmillingliquor.Itisindicatethatunder
theconditionofNaOH200g/L,dessolvedaluminum70to110g/L,temperature(90±5)℃,theribwidth
differencereachtoTw ±0.75mm,thethickdifferencereachtoTs±0.15mm。