It is indicated that the sub default has influence on materials microstructure and some properties on the basis of NDT, TEM and analysis of ablative and mechanical property.

• 对大锥角防热层的亚缺陷进行无损检测、蚀性能、学性能及扫描电镜分析,分析表明亚缺陷对材料的结构和性能有一定的影响。