无机材料学报

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烧蚀防热材料的显微结构研究

江伟辉1; 周健儿1; 胡行方2; 吴国庭3   

  1. 1. 景德镇陶瓷学院材料工程系, 景德镇 333001; 2. 中国科学院上海硅酸盐研究所, 上海 200050; 3. 北京空间飞行器总体设计部, 北京100086
  • 收稿日期:2001-10-24 修回日期:2001-01-18 出版日期:2002-11-20 网络出版日期:2002-11-20

Microstructures of Ablative Materials for Thermal Protection

JIANG Wei-Hui1; ZHOU Jian-Er1; HU Xing-Fang2; WU Guo-Ting3   

  1. 1. Jingdezhen Ceramic Institute; Jingdezhen 333001; China; 2. Shanghai Institute of Ceramics; CAS; Shanghai 200050, China; 3. Beijing Institute of Spacecraft System Engineering; Beijing 100086; China
  • Received:2001-10-24 Revised:2001-01-18 Published:2002-11-20 Online:2002-11-20

摘要: 研究了二种烧蚀防热材料的显微结构.研究表明:烧蚀材料1#中的高硅氧玻璃纤维在模拟烧蚀后仍保持其纤维形态不变,并且大、中、小纤维以适当的配比结合,使得纤维堆积密度增大,从而能提高材料的机械强度;烧蚀材料2具有蜂窝夹心结构,在蜂窝中填充的低密度材料是由50~100μm的空心玻璃球所组成的,这赋予它密度低、隔热性能好的特点.

关键词: 烧蚀材料, 显微结构, 防热

Abstract: The microstructures of two ablative materials were studied. The results show that the silica fiber
glass in No.1 ablative material remains unchanged after the simulative ablation, and proper combination of the fiber glass with different
diameters leads to increase in packing density, which not only makes the ablative material possess high mechanic strength, but also improves
its thermal insulation at high temperature. No.2 ablative material has the honeycomb structure. The honeycomb is filled with hollow glass
pellets of 50~100μm in diameter. Due to this special structure, No.2 ablative material is characterized by low density and high thermal
insulation.

Key words: ablative material, microstructure, thermal protection

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