A high performance adhesive is used to join Zerodur to a carbon fiber reinforced polymers (CFRPs) honeycomb (HC) in a sandwich structure for aerospace applications. The main problem of finding an adhesive with suitable thermomechanical stability and ease of application for use in large components, together with a lower curing temperature than 160 °C, in order to avoid detrimental effects on the CFRPs is resolved. Two phenolic‐based and one cyanate ester‐based adhesives are considered. One phenolic‐based adhesive that is already proven effective in the joining of carbon/carbon composites (C/C) is used to join CFRP slabs and Zerodur–CFRP–Zerodur in a sandwich structure. Thermal analysis is conducted to characterize and compare the phenolic adhesive, cured at 150 °C and at 260 °C, with a cyanate ester‐based adhesive and a commercial phenolic‐based one. The phenolic adhesive cured at 150 °C results to be the most suitable joining material; the lap shear strength of the CFRP slabs joined at room temperature is measured after thermal cycling. Zerodur–CFRP–Zerodur sandwich structures, joined by the phenolic adhesive cured at 150 °C, are tested in tensile and lap shear modes.

中文翻译：

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用于航空航天应用的Zerodur–CFRP–Zerodur夹心结构的粘接

高性能粘合剂用于将Zerodur与三明治结构的碳纤维增强聚合物（CFRP）蜂窝（HC）结合在一起，用于航空航天应用。解决了找到一种粘合剂的主要问题，该粘合剂具有合适的热机械稳定性，并且易于在大型部件中使用，并且固化温度低于160°C，以避免对CFRP产生不利影响。考虑使用两种基于酚醛的粘合剂和一种基于氰酸酯的粘合剂。一种已经被证明可以有效地连接碳/碳复合材料（C / C）的酚醛基胶粘剂用于将CFRP平板和Zerodur–CFRP–Zerodur以三明治结构连接在一起。进行热分析以表征和比较在150°C和260°C下固化的酚醛粘合剂，使用基于氰酸酯的胶粘剂和基于酚醛的商业胶粘剂。结果表明，在150°C下固化的酚醛粘合剂是最合适的连接材料。热循环后，测量在室温下连接的CFRP板的搭接剪切强度。Zerodur–CFRP–Zerodur三明治结构与通过在150°C固化的酚醛粘合剂连接的结构在拉伸和搭接剪切模式下进行了测试。