Study On The Heat-insulation Properties Of Si-Ablative Material

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.