【作者】 肖永栋；

【导师】 张联盟； 雷国栋； 李新华；

【作者基本信息】 武汉理工大学 ， 材料学， 2002， 硕士

【摘要】 针对型号发展对烧蚀材料提出的更高的隔热性能要求，本文提出了一种复合型防热套的工艺方案。采用在防热套内层增加隔热功能层的方法，在保持传统防热套良好烧蚀性能的同时，其隔热性能得到了较大地提高。 本文以一锥形复合防热套为研究对象，从烧蚀、隔热机理的理论分析和工艺试验两方面，进行了一下研究工作： 1、通过对提高材料及制品通过对提高材料及制品隔热性能的多种途径进行探讨，提出了采用添加隔热功能层，研究复合型大面积防热套是理论有效、工艺可行的方案； 2、通过建立有限元分析模型，对防热套的烧蚀隔热行为进行了理论分析，提出了简化的隔热计算方法，并用该方法对复合型防热套的瞬态传热模型进行了分析计算； 3、通过复合型防热套的工艺探索试验，提出了一种工程应用上切实可行的工艺方案。 4、采用共固化的固化方式，较好地解决了防热套的隔热功能层的界面问题，并成功的研制出复合型防热套的样件。 5、解剖防热套进行性能评价试验研究，通过材料力学及机械性能测试、导热系数测试、Y68-4发动机动态烧蚀试验来综合评价复合型防热套的性能，最终与目标型号的材料需求进行对比，探讨工程应用的可能性。 通过以上研究，得到以下结论：采用布带缠绕工艺、在防热层内添加隔热功能层的方案能显著提高其隔热性能，同时保持原有防热套的烧蚀性能和其他物理机械性能，该方案对后续工序无显著影响。同时无需特种工艺设备，原材料来源充足，制备工艺合理可行，因此能满足型号工程的要求，具有较好的应用前景。更多还原

【Abstract】 To meet the demands of higher insulation performances for certain military applications,a compound heatshield design is proposed .A method that adding an insulating functional layer to the interior of the heatshield is adopted to improve its insulation performances while maintaining its original excellent ablative performances.Based on a cone-shaped compound heatshield,a series of research work has been done from the investigation of theoretical analyses of ablative and insulating principles and technical experiments.1 Based on the exploration of improving material performances,a feasible scheme of adding insulating functional layer is proposed ;2 A simplified calculation method is proposed via establishing FEA(fmite element analysis) and instantaneous heat transmission is calculated with the mentioned method;3 A practical engineering scheme is proposed through a series of experiments;4 The interface problems of the function layer are solved through co-curing method and successful samples are manufactured ;5 In order to estimate properties,the heatshield was anatomized Engineering applied possibility is explored on the analyses of performance evaluation by testing mechanical properties,coefficient of heat conductivity and doing dynamic ablative experiments ,Also,the comparison with that of the required materials is done.In conclusion ,the method of adding a function layer through type winding will improve the insulating performances greatly while maintaining its original ablative performances. Compared with other technical schemes ,no special equipment is needed. Hence,sufficient raw materials and feasible process enable its promising prospect.更多还原