辐射/烧蚀交替型柔性防热复合材料

Radiation/Ablation Flexible Thermal Protection Materials

通过优化防热方式,提高柔性防热材料的烧蚀防热性能,设计制备了一种辐射/烧蚀交替型柔性防热材料,该柔性防热材料由多层复合防热布叠合构成,复合防热布是一种烧蚀体表面附着辐射层的复合材料,并通过氧乙炔烧蚀试验评价了其热防护性能。通过辐射层表面处理方法提高辐射层与烧蚀层的粘接性,用T型剥离试验、SEM评价了其粘接性能。结果表明,较烧蚀型防热材料,辐射/烧蚀交替型柔性防热材料具有更优异的热防护性能,烧蚀后防热层完好数更多,背温更低;表面处理方法可有效提高剥离强度,在处理剂浓度为5%时,效果最佳。

Thermal protect performance of flexible materials was improved by devising the method of thermal protection. A radiation/ablation alternate flexible thermal protection materials（ FTPM） was designed,which was composed of multi layer of composites of heat-resistant and evaluated by oxyacetylene ablation test. In order to eliminate the poor adhesion between the radiation layer and ablation layer,the adhesion properties was evaluated by T peel test and SEM after modified by surface treatment. The results showed that new FTPM possesses much more excellent ablative performance than conventional ablators,because FTPM has more layers in good condition and lower temperature after ablation test. Adhesion properties were improved effectively by surface treatment and obtained the best with 5wt%.