【摘要】 研究了不同组成的NEPE推进剂/衬层粘接界面细观力学性能和结构的差异,以及对应粘接界面贮存过程中粘接性能和破坏方式的变化规律,探索了粘接界面的细观力学性能、结构与破坏方式的内在关联,初步提出NEPE推进剂/衬层粘接界面失效模式。试验结果表明,粘接界面细观力学性能、结构与界面粘接质量相关,是影响界面失效模式的主要因素。粘接界面具有高模量、高硬度层,N元素含量高且有明显梯度变化时,粘接质量较好,发生内聚破坏,反之发生界面破坏或混合破坏;老化过程中,粘接界面的模量和硬度降低、N元素的含量明显降低决定粘接界面依次发生内聚破坏、混合破坏和界面破坏。更多还原

【Abstract】 The diversities of microcosmic mechanical performance/structure in different bonded interface of NEPE propellant/liner and the rule of bonded performance and breakage modes were studied.The inhesion correlations between microcosmic mechanical performance/structure with breakage mode were researched.The prelimary failure mode of NEPE propellant/liner was put forward.The experimental results show that microcosmic mechanical performance/structure has inhesion correlation with the quality of interface and it is the main factor which affects interface failure mode.The bonding quality is good and failure occurs in cohesion breakage when the bonded interface has high modulus,high hardness layer and high content of N element with distinct gradient change.Otherwise,the failure occurs in mixed breakage or interface breakage.The modulus and hardness and the content in N element in bonded interface decreases distinctly during the aging process,and the failure occurs in cohesion breakage and mixed breakage and interface breakage in turn.更多还原