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在不同热压载荷下制备出碳纤维增强AZ31B复合层板,并分析了机械振动对复合层板界面的影响。通过粘接拉伸法对复合层板的界面结合性能进行测试,并利用OM对复合层板横截面的微观组织进行观察分析。结果表明:随热压载荷的升高,界面粘接拉伸强度先增加后减小,60 MPa热压载荷下的结合强度最高。同时,机械振动起到搅拌作用,促进了金属液体的流动,提高了碳纤维与基体间的润湿性,并且碳纤维均匀分布在金属共晶液中。施加机械振动后层界面的结合强度比施加振动前都得到提高,并且60 MPa热压载荷下结合强度提高了1.5倍,达到11.06 MPa。
The carbon fiber reinforced AZ31B composite laminates were prepared under different hot pressing loads and the influence of mechanical vibration on the interface of the composite laminates was analyzed. The interfacial bonding properties of the composite laminates were tested by the bonding and stretching method. The microstructure of the cross-section of the composite laminates was observed and analyzed by OM. The results show that with the increase of hot press load, the tensile strength of interfacial adhesion first increases and then decreases, and the bonding strength under 60 MPa hot press load is the highest. At the same time, mechanical vibration plays a role of stirring, promotes the flow of the metal liquid, improves the wettability between the carbon fiber and the matrix, and the carbon fibers are uniformly distributed in the metal eutectic liquid. The bonding strength of the interface of the rear layer after mechanical vibration was increased before vibration was applied, and the bonding strength increased by 1.5 times and reached 11.06 MPa under 60 MPa hot press load.