A novel graphene modified high-temperature resistant adhesive for bonding carbon/carbon composites was developed. The effects of graphene content on the mechanical properties, thermal conductivities and braking properties of the carbon/carbon joints were studied. When the graphene content in the adhesive was 1.5 wt%, the specimens possessed the bonding strength of 13.2 MPa and the thermal conductivity of 23.89 W/(m•k), which were 63.09% and 145.03% higher than those of 0.0 wt%, respectively, and 24.38% and 64.53% higher than those of 5.0 wt%, respectively. The excellent properties were attributed to the uniform dispersion of graphene in the adhesive matrix, which could effectively reduce the stress concentration and provide a fast heat conductivity network chain. The adhesive properties also had an obvious influence on the braking performance. Finite element analysis considered that the main reason for the difference in braking performance was that the temperature and field distribution on the friction surface were affected by the thermal conductivity of the adhesive.

开发了一种新型的石墨烯改性耐高温胶粘剂，用于粘结碳/碳复合材料。研究了石墨烯含量对碳/碳接头的力学性能，热导率和制动性能的影响。当粘合剂中的石墨烯含量为1.5 wt％时，样品的粘结强度为13.2 MPa，导热系数为23.89 W /（m•k），比0.0 wt％的样品高63.09％和145.03％，分别比5.0 wt％的高出24.38％和64.53％。优异的性能归因于石墨烯在胶粘剂基质中的均匀分散，可以有效降低应力集中并提供快速的导热网络链。粘合性能也对制动性能有明显的影响。