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一、前言 烧蚀材料是航天事业广泛采用的热防护材料.它是通过表面层被烧蚀而吸收大量的热能,同时生成多孔碳化层与降解层阻止热能向内部传导,从而对底层结构和仪器起到防护作用.实验证明,烧蚀材料是解决再入热防护中可靠性最高,技术最成熟的一种方法.因此对烧蚀材料提出一系列技术指标,仅就分解一项就有分解温度、分解焓、分解率及分解动力学等、确定上述参数对材料评选,总体设计以及温控系统的研制是十分重要的.
I. Introduction Ablative materials are widely used thermal protection materials in the aerospace industry.It absorbs a large amount of heat through the ablation of the surface layer and at the same time generates a porous carbonized layer and a degraded layer to prevent the heat energy from being conducted to the inside so that the underlying structure and apparatus Play a protective role.Experiments have shown that the ablation material is to solve the re-entry thermal protection, the highest reliability, the most mature technology method.Therefore, ablation materials proposed a series of technical indicators, only a decomposition of the decomposition temperature , Decomposition enthalpy, decomposition rate and decomposition kinetics, etc., to determine the above parameters on the material selection, the overall design and development of temperature control system is very important.