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时间:2020-06-03
《耐磨涂层用SiC/PI复合薄膜的碳化研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、表面技术第43卷第2期·42·SURFACETECHN0L0GY2014年04月耐磨涂层用SiC/PI复合薄膜的碳化研究寇玉洁,张盼盼,牛永安,刘俊凯,白瑞,李轰(哈尔滨工业大学复合材料与结构研究所,哈尔滨150080)摘要:目的拓宽碳化硅增强聚酰亚胺(SiC/PI)复合薄膜在耐磨涂层领域的应用。方法利用流延成膜法制备SiC/PI复合薄膜,在氮气氛围中对复合薄膜进行600~1000oC的碳化处理,并对碳化后的薄膜进行SEM.XRD及丌IR等测试.分析碳化过程中组织结构的变化。结果由于SiC纳米颗粒起到物理交联点的作用.复合薄膜的
2、热稳定性和残碳率得到提高,同时也具有了断裂塑性特征。随着碳化温度升高,复合薄膜六角碳层结构逐步完善。PI在碳化中,芳核自由基聚合成环数更多的分子,且SiC与PI的界面处产生Si—O键。结论碳化过程中,SiC纳米粒子与PI作用形成微弱的化学键合,改善了碳膜的界面结合情况.使得其耐热性得到提高。关键词:SiC/PI复合薄膜;耐磨涂层;碳化;微观结构中图分类号:TG174.461文献标识码:A文章编号:1001.3660(2014)02-0042-07StudyontheStructureofSiC/PICompositeFilman
3、dItsPerformanceinCarbonizationProcessKOUru.jie,ZHANGPan-pan,NIUyo-an,LIUJun-kai,BAIRui,LIYao(CentreforCompositeMaterialsandStructures,HarbinInstituteofTechnology,Harbin150080,China)ABSTRACT:ObjectiveTobroadentheapplicationareaofsiliconcarbidereinforcedpolyimide(SiC/P
4、I)compositefilmasero-sionresistantcoating.MethodsThestretchfilmformingmethodwasusedtoprepareSiC/PIcompositefilms,thenSiC/PIfilmwascarbonizedattemperaturesrangingfrom600to1000℃,andthecarbonfilmswereanalyzedbySEM,XRDandFTIRtestsforthechangeoftheorganizationalstructurea
5、ftercarbonization.ResultsDuetoitsroleasaphysicaljunction,siliconcarbidenano—parti—clesincreasedtheheatstabilityandcarbonyieldofthefilms,andgrantedthefilmswithplasticfracturecharacteristics.Asthetemperatureincreased,theHexagonalcarbonlayerstructurewasgraduallyformed.S
6、iliconcarbideandpolyimidearomaticnuclearfreeradicalpolymerizedandproducedmoleculeswithmoreringsincarbonization.andSi—ObondswereformedontheinterfaceofSiCandPI.ConclusionDuringthecarbonization,thenano—particlesSiCandPIinteractedtoformweakbond,improvingtheinter-facebond
7、ingandtheheatresistanceofcarbonfilms.KEYWORDS:SiC/PIcompositefilms;wear—resistantcoating;carbonization;microcosmicstructure收稿日期:2013.10-26:修订日期:2013—12-04Received:2013·10-26;Revised:2013-12-04作者简介:寇玉洁(1990一),女,陕西渭南人,硕士,主要研究方向为聚酰亚胺及其复合材料的制备、改性和碳化。Biography:KOUYu-jie(1
8、990一),female,fromWeinan,Shaanxi,Master,Researchfocus:polyimide,polyimidecomposite&preparation,modificationandcarbonization.通讯作者:李壶(
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