T700/QY9611复合材料层压板孔隙检测及孔隙形貌研究

Porosity and Pore Morphology of T700/QY9611 Composite Laminates

采用模压法制备了4种不同铺层厚度的T700/QY9611复合材料层压板,用超声C扫描选取衰减均匀区域,制得24块显微照相法试样,拍摄了1 800余张金相照片;采用电子显微镜观察了孔隙的微观形貌;Image J软件计算了孔隙率并定量统计分析孔隙形貌。研究表明:该复合材料层压板孔隙总是分布在纤维与树脂的交界处,沿层间生长,随着层压板铺层厚度的增加,层压板孔隙率呈指数增长,且对孔隙形貌(长度、宽度、面积、形状)有不同程度的影响,例如孔隙长度、宽度分布范围不断增大,大尺寸孔隙所占比例不断增加,圆形、椭圆形孔隙所占比例不断减小,不规则孔隙所占比例不断增加。

Four kinds of T700/QY9611 composite laminates with different layer thickness were prepared by the molding method. The24 microcosmic gold phase samples were obtained by ultrasonic C scanning and 1 800 metallography photographs were obtained. The micromorphology of the pores was observed by electron microscope. The porosity and quantitative statistical analysis of pore morphology were calculated by the Image J software. The study shows that the pore size of the composite laminates is always distributed along the boundary between the fiber and the resin and grows along the layer. With the increase of the thickness of the laminates,the porosity of the laminates increased exponentially,and the pore morphology（ length,width,area,shape） has the influence of different range,such as the pore length and width distribution. The proportion of large size pores is increasing,the proportion of circular and elliptical pores is decreasing,and the proportion of irregular pores is increasing.