项目来源

德国科学基金(DFG)

项目主持人

GünterMotz；

项目受资助机构

UniversitätBayreuth,FakultätfürIngenieurwissenschaften,LehrstuhlKeramischeWerkstoffe

立项年度

2015

立项时间

未公开

项目编号

284004736

项目级别

国家级

研究期限

未知 / 未知

受资助金额

未知

学科

Glass,CeramicsandDerivedComposites;MechanicalPropertiesofMetallicMaterialsandtheirMicrostructuralOrigins;SynthesisandPropertiesofFunctionalMaterials

学科代码

未公开

基金类别

ResearchGrants

关键词

未公开

参与者

SamuelBernard

参与机构

AgenceNationaledelaRecherche/TheFrenchNationalResearchAgency

项目标书摘要：Non-oxideceramicfibershavebeenwidelyusedforthereinforcementofceramicmatrixcomposites(CMCs).Despiteconsiderableeffortstodevelopnewnon-oxideceramicfibersinthelastfewyears,theiruseatindustriallevelexclusivelyconcernsiliconcarbide(SiC)fibers.ButSiCfibersareveryexpensive(from1.5to10kEuro/kg)dependingonthequalityofthefibers,mainlybecausetheproductionisdominatedbycompaniesfromJapanwithnoalternativeproductsfromothercountries.Toreducethecostsofthefibersandtobecompetitiveonthistopic,amobilizationofactivitiesandresourcesoftheacademicEuropeanresearchers,especiallyfromFranceandGermany,isproposedinthepresentproject.Thisprojectconcernsthedesign,processingandinvestigationofthepropertiesofanewclassofcost-effectivepolymerderivednon-oxideceramicfiberswithadditionalfunctionalproperties.Theproposedmaterialsareexpectedtobeusedasreinforcementforthermostructuralapplicationswithelectricalandmagneticproperties.Tomeettherequirementsfortheapplicationsmentionedabovetheobtainedfibersneedtocombinedurabilityinaggressiveandharshenvironmentswhileachievingfunctionalproperties,suchaselectricalconductivityandmagneticproperties.Thesepropertiescanbeachievedthroughthemodificationof(Si-(B/Al)-C-N)polymerswithmetal-organiccompounds,leadingtothein-situgrowthofthefunctionalnanophasesimultaneouslywiththeformationoftherespectiveceramicSiCN(B/Al)matrixduringpyrolysis.Toreachourobjectives,theprojectisdividedintofiveinterconnectedscientifictasks.Thefirsttask(Ta1)isfocusedonthesynthesisandcharacterization(throughNMR,FTIR,molecularweightmeasurementsandelementalanalyses)ofthemetal-modifiedpreceramicpolymers.Thesecondtask(Ta2)dealswiththemelt-spinningandcuringofthepolymerfibers,astheoptimizationofthespinningprocessbymeansofrheologicalinvestigationofthesynthesizedpreceramicpolymers.Task3(Ta3)isfocusedontheconversionofthecuredpolymerfiberspreparedinTa2intothedesiredmetalcontainingfunctionalizedceramicfibers.Detailedinvestigationofthepolymer-to-ceramicconversionwillbeachievedthroughFTIR,TG-GC/MSandsolid-stateNMR.Task4(Ta4)isdedicatedtothecharacterizationofceramicfibers,concerningthemechanicaland(nano)structuralpropertiesandthefunctionalitiesofthemetal-containingSiCN(B/Al)fibers,inparticulartheirelectricalandmagneticproperties.Ta5dealswiththeprocessmodelingoftheceramicfibertransformation.

Application Abstract: Non-oxideceramicfibershavebeenwidelyusedforthereinforcementofceramicmatrixcomposites(CMCs).Despiteconsiderableeffortstodevelopnewnon-oxideceramicfibersinthelastfewyears,theiruseatindustriallevelexclusivelyconcernsiliconcarbide(SiC)fibers.ButSiCfibersareveryexpensive(from1.5to10kEuro/kg)dependingonthequalityofthefibers,mainlybecausetheproductionisdominatedbycompaniesfromJapanwithnoalternativeproductsfromothercountries.Toreducethecostsofthefibersandtobecompetitiveonthistopic,amobilizationofactivitiesandresourcesoftheacademicEuropeanresearchers,especiallyfromFranceandGermany,isproposedinthepresentproject.Thisprojectconcernsthedesign,processingandinvestigationofthepropertiesofanewclassofcost-effectivepolymerderivednon-oxideceramicfiberswithadditionalfunctionalproperties.Theproposedmaterialsareexpectedtobeusedasreinforcementforthermostructuralapplicationswithelectricalandmagneticproperties.Tomeettherequirementsfortheapplicationsmentionedabovetheobtainedfibersneedtocombinedurabilityinaggressiveandharshenvironmentswhileachievingfunctionalproperties,suchaselectricalconductivityandmagneticproperties.Thesepropertiescanbeachievedthroughthemodificationof(Si-(B/Al)-C-N)polymerswithmetal-organiccompounds,leadingtothein-situgrowthofthefunctionalnanophasesimultaneouslywiththeformationoftherespectiveceramicSiCN(B/Al)matrixduringpyrolysis.Toreachourobjectives,theprojectisdividedintofiveinterconnectedscientifictasks.Thefirsttask(Ta1)isfocusedonthesynthesisandcharacterization(throughNMR,FTIR,molecularweightmeasurementsandelementalanalyses)ofthemetal-modifiedpreceramicpolymers.Thesecondtask(Ta2)dealswiththemelt-spinningandcuringofthepolymerfibers,astheoptimizationofthespinningprocessbymeansofrheologicalinvestigationofthesynthesizedpreceramicpolymers.Task3(Ta3)isfocusedontheconversionofthecuredpolymerfiberspreparedinTa2intothedesiredmetalcontainingfunctionalizedceramicfibers.Detailedinvestigationofthepolymer-to-ceramicconversionwillbeachievedthroughFTIR,TG-GC/MSandsolid-stateNMR.Task4(Ta4)isdedicatedtothecharacterizationofceramicfibers,concerningthemechanicaland(nano)structuralpropertiesandthefunctionalitiesofthemetal-containingSiCN(B/Al)fibers,inparticulartheirelectricalandmagneticproperties.Ta5dealswiththeprocessmodelingoftheceramicfibertransformation.