炭纤维与树脂对c2fc-sic摩擦材料性能的影响

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1、硕士学位论文摘要大，23％含量的试样的摩擦系数的波动较小；纤维含量为10％的试样的磨损率在0．17～19．2x10-7,cm3．N'l-m"1内波动；纤维含量为23％的试样的磨损率在0．7～0．81xlO'70cm30N-I·mJ内波动。预氧丝增强的试样的摩擦系数在0．54""0．72范围内，纤维含量为23％的试样的摩擦系数较小且波动较小；预氧丝含量为15％的试样的磨损率在0．46"-'-1．09x10"7．cm30N-i．m。1内变化，波动较小；而10％的试样的磨损率在0．66"-'16．67x10"7．cm30N"1．n10呈正弦波动，波动较大。整体来看，预氧丝增强的材料的摩擦

2、系数和磨损率较大。(6)不同树脂做粘结剂制备的C／C．SiC试样中，硼改性树脂制备的试样的摩擦系数在0．50"-'0．72范围内，40％树脂含量的试样的摩擦系数波动较小；22．5％树脂含量的试样的磨损率在O．42～21．76x107·cm3·N-1．m。1范围变化，波动较大，30％树脂含量的试样的磨损率在0．7"-'0．8x10-7·cm30N'I．m‘1范围变化，波动较小。无机纳米改性的树脂制备的试样的摩擦系数在0．56"'0．78范围内，30％树脂含量的试样的摩擦系数波动较小；40％树脂含量的试样的磨损率在0．38"-"1．18x10"7·cm30N"I·m。范围变化，波动较大

3、，37．5％树脂含量的试样的磨损率在0．47"-'0．64x10-7-cm3．Nq．m。范围变化，波动小。整体来说，无机纳米改性的树脂制备的材料的摩擦系数较大，磨损较小。关键词：C／C．SiC，纤维，树脂，力学性能，摩擦n硕士学位论文ABSl]RACTABSTRACTC／C-SiCcompositeshasbroadapplicationprospectasthenewestgenerationfrictionmaterialsbecauseofitsadvantagesoflowdensity,excellentoxidationresistanceandgoodfriction

4、properties．Inthispaper，theshortperiodsandlowercostwarmpressingandin．situreactionprocesswasusedtomanufactureC／C．SiC，Theeffectsofsiliconizationandheattreatmentonthestructureandintensionofcarbonfibre．theheatdecompositionofresin，theeffectsofdifferentcarbonfibresandresinsontheperformanceofC／C．SiCwe

5、reresearched．Theresultsshowthat：(1)ThepullintensityofHTAaftersiliconizationreducedto0．32GPafrom3．15GPa，Thesurfaceroughnessofpreoxidizedfibreafterheattreatmentdecreasedandintensityincreasedto1．62GPafrom0．26GPa．(2)Theremnantcarbonrateofboron．modifiedphenolicresinaftercarbonizationat850℃was64％．th

6、elineshrinkandbulkshrinkratewere14．6％and37．9％．itsweightlOSSvelocityinthe25．200℃and500—700℃phaseswashigh．mileTheremnantcarbonrateofInorganicnano．modifiedphenolicresinaftercarbonizationwas64％．thelineshrinkandbulkshrinkratewere23．4％and48．4％．itsweightlOSSvelocityofnano．modifiedphenolicresininthe35

7、0．700℃phasewashigh．(3)InthedifferentfibresenhancedC／C．SiCsamples，ThemechanicsperformanceofT700enhancedC／C—SiCwasbetter．withthefibervolumeincreasing．itscompressivestressfirstlyincreasedthendecreasedand．impactstressincreased．compositeshav