The performance of low weight, high stiff multi-materials relies on the interfacial bond quality between the adherends. This study analyses the effect of surface roughness, organosilane treatment and coating with diamond like carbon on the adhesion strength between carbon fiber reinforced composites and an additively manufactured (AM) AlSi10Mg counterpart. Extending applications to sandwich structures, both, bulk and honeycomb structured counterparts were considered. Double-Lap Shear specimens were fabricated in a co-curing process, and further investigated regarding the bond efficiency. Results were compared to the state-of-the-art joints applying an adhesive film layer. It was observed that surface roughness is not pivotal when using such adhesive film. In contrast, higher surface roughness generally tends to promote adhesion strength by promoting mechanical interlocking and increasing the available bond area. Further coating with organosilanes and diamond like carbon increases the surface energy and reduces the contact angle thus improving surface wettability by the matrix resin. In consequence, an improvement of up to 30% in adhesion strength was observed in case of coating the metallic surface with diamond like carbon. Prior surface polishing of the additively manufactured parts does not significantly affect the bond quality and is therefore not recommended.

低重量、高刚度的多材料的性能取决于被粘物之间的界面粘合质量。本研究分析了表面粗糙度、有机硅烷处理和类金刚石碳涂层对碳纤维增强复合材料和增材制造 (AM) AlSi10Mg 对应物之间粘附强度的影响。考虑将应用扩展到夹层结构，包括散装结构和蜂窝结构对应物。双搭接剪切试样是在共固化过程中制造的，并进一步研究了粘合效率。结果与应用粘合膜层的最先进的接头进行了比较。据观察，当使用这种粘合膜时，表面粗糙度不是关键。相比之下，较高的表面粗糙度通常会通过促进机械互锁和增加可用粘合面积来提高粘合强度。进一步用有机硅烷和类金刚石碳涂层可增加表面能并降低接触角，从而提高基体树脂的表面润湿性。结果，在用类金刚石碳涂覆金属表面的情况下，观察到粘附强度提高了高达 30%。增材制造零件的事先表面抛光不会显着影响粘合质量，因此不建议使用。结果，在用类金刚石碳涂覆金属表面的情况下，观察到粘附强度提高了高达 30%。增材制造零件的事先表面抛光不会显着影响粘合质量，因此不建议使用。结果，在用类金刚石碳涂覆金属表面的情况下，观察到粘附强度提高了高达 30%。增材制造零件的事先表面抛光不会显着影响粘合质量，因此不建议使用。