碳纤维表面状态及其对复合材料剪切性能的影响  被引量:1

Surface status of carbon fibers and shear properties of carbon fibers reinforced matrix composites

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作  者:黄炎 梁禄忠 孙金萍[1] 王志强[1] 

机构地区:[1]中航工业沈阳飞机工业(集团)有限公司,沈阳110819

出  处:《材料与冶金学报》2015年第3期197-200,206,共5页Journal of Materials and Metallurgy

基  金:辽宁省科学技术计划项目资助(No.2012222010)

摘  要:采用X射线衍射仪和扫描电镜观察了碳纤维表面的微观结构以及复合材料的截面形貌,分析了进口碳纤维和国产碳纤维的表面状态差异,以及此差异对碳纤维复合材料进行层间剪切强度(ILSS)的影响.结果表明进口碳纤维表面粗糙度更大,沟槽深度和宽度均大于国产碳纤维.在树脂基复合材料中,进口碳纤维与树脂基体结合更为紧密,固化后形成制件的孔隙率更低,其室温和高温层间剪切强度都高于相应国产碳纤维体系.因此,尽管表面处理会对碳纤维表面造成一定的影响,但处理后得到的高粗糙度表面是纤维在复合材料中形成较强界面的根本原因.Surface status of imported and domestic carbon fibers was compared, and the shear test was conducted on the composite of carbon fiber with different surface status. Microstructure of carbon fibers was identified by X - ray diffractometer(XRD). Surface of the carbon fibers and cross- sectional morphologies of the composite were observed by scanning electron microscope ( SEM ). The results showed that the imported carbon fiber has a rougher surface while its grooves are deeper and wider. In resin - matrix composites, the imported fibers are integrated with the matrix more tightly and porosity of the sample solidified by the imported fibers is more lower. The shear strength at the room and the high temperatures is higher than that of domestic carbon fiber. Therefore, though the fiber surface is influenced by the surface treatment, the more rough physical surface can promote the surface bonding.

关 键 词:碳纤维 复合材料 界面 剪切强度 

分 类 号:TB332[一般工业技术—材料科学与工程]

 

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