Shear Strength of Adhesive Lamination Joint of Aluminum and CFRP Sheets Treated by Homogeneous Low Energy Electron Beam Irradiation Prior to Lamination Assembly and Hot-Press
Shear Strength of Adhesive Lamination Joint of Aluminum and CFRP Sheets Treated by Homogeneous Low Energy Electron Beam Irradiation Prior to Lamination Assembly and Hot-Press
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DOI：
10.2320/matertrans.maw201419
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发表时间：
2014-10
影响因子：
1.2
通讯作者：
T. Okada;Masae Kanda;M. Faudree;Y. Nishi
中科院分区：
文献类型：
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作者：
T. Okada;Masae Kanda;M. Faudree;Y. Nishi
采用一种新的粘接方法制备了铝/碳纤维增强环氧树脂（Al/CFRP）双层复合粘接接头，即在复合前对CFRP和Al进行低剂量（= 0.22MGy）的均匀低能电子束辐照（HLEBI），然后在403 K下真空热压2 h。没有紧固件或外部粘合剂的应用：固化的环氧树脂增强的HLEBI作为粘合剂的Al。新的处理明显提高了剪切强度（XFS）的Al/CFRP 45%，在低剪切强度概率（Ps=0.06）在0.22 MGy。XPS（X射线光电子能谱法）测量检测到剪切断裂的Al界面上的碳，表明残留的环氧树脂通过HLEBI很好地粘附到Al上。这可能是由于Al/CFRP的粘附力比CFRP本身中环氧聚合物的凝聚力更强的结果。当HLEBI切断环氧聚合物中的化学键并产生具有悬挂键的活性封端原子时，非成键电子可能在界面处诱导化学键和分子间库仑吸引力。因此，可以解释在Al/CFRP接头中增加的粘附力。[doi：10.2320/matertrans.MAW201419]
Adhesive 2-layer lamination joint of aluminum/carbon fiber reinforced epoxy polymer (Al/CFRP) were prepared by a new adhesion method, a double-step treatment consisting of applying low dose (= 0.22MGy) of homogeneous low energy electron beam irradiation (HLEBI) to the CFRP and Al prior to lamination assembly and hot-press in vacuum below 1Pa for 2h at 403K. No fasteners or external adhesives were applied: the cured epoxy enhanced by the HLEBI acts as the adhesive to the Al. The new treatment apparently boosted shear strength (¸) of the Al/CFRP 45% at low shear strength probability (Ps=0.06) at 0.22MGy. XPS (X-ray photoelectron spectrometry) measurements detected carbon on the shear fractured Al interface indicating the residual epoxy adhered well to the Al by the HLEBI. This is probably a result of adhesion force of Al/CFRP being made stronger than the cohesive force of epoxy polymer in the CFRP itself. When HLEBI cuts the chemical bonds and generates active terminated atoms with dangling bonds in epoxy polymer, the nonbonding electrons probably induced the chemical bonding and intermolecular coulomb attractive forces at the interface. Hence, the increased adhesion force in the Al/CFRP joint can be explained. [doi:10.2320/matertrans.MAW201419]