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。
Carbon fiber reinforced AZ31B composite laminas were fabricated under different hot-pressing loads, and the effects of mechanical vibration on the interface of laminas were analyzed. The interfacial bonding properties of the laminas were tested by the adhesive tensile testing method, and the optical microscope (OM) was utilized to investigate the cross sectional microstructure. The results show that the interfacial tensile bonding strength increases and then decreases with the increase of hot-pressing loads, and the peak bonding strength is obtained at 60 MPa pressure. Besides, the fluidity of the metal liquid is promoted by the mechanical vibration which can generate the stirring effect and enhance the wettability of the carbon fiber and the matrix. The uniformly distributes carbon fibers are infiltrated thoroughly in the metallic eutectic liquid. The bonding strength after applying mechanical vibration can reach 11.06MPa at 60 MPa pressure, which is increased by 1.5 times.