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碳/碳复合材料的应用日益增加,产生了需要辅助粘结的设计方案。就某些情况来讲,辅助粘结是用于火箭喷管部件的主要粘结方法。在其它一些设计中,除了采用机械紧固装置外也采用辅助粘结。碳/碳材料界面的辅助粘结不但使设计具有灵活性,而且还能减轻复杂的加工问题。在实施的一项辅助粘结研究计划中,取得了四种材料和四种不同工艺的层间剪切强度数据,其中包括在2480℃(4500℉)下的石墨化。还获得了室温和高温2204℃(400℉)的数据。在2204℃(4000℉)下测得的剪切强度高达12.41兆帕(1800磅/吋~2);相反,薄粘结层的值低到0.41兆帕(60磅/吋~2)。结果说明,辅助粘结是一种具有生命力的工艺,可以利用它来连接碳/碳结构部件。
The increasing use of carbon / carbon composites has created a design that requires secondary bonding. In some cases, secondary bonding is the primary method of bonding for rocket nozzle components. In other designs, an auxiliary bond is used in addition to mechanical fastening. The secondary bonding of the carbon / carbon material interface not only gives the design flexibility, it also alleviates complex processing problems. In an implementation of a cohesive bonding research program, interlaminar shear strength data were obtained for four materials and four different processes, including graphitization at 2480 ° C (4500 ° F). Also available at room temperature and high temperature 2204 ℃ (400 ℉) data. The shearing strength measured at 2204 ° C (4000 ° F) is as high as 12.41 MPa (1,800 psi); on the contrary, the value of the thin adhesive layer is as low as 0.41 MPa (60 psi). The results show that secondary bonding is a viable process that can be used to connect carbon / carbon structural components.