前言 碳-碳复合材料主要用作防热烧蚀材料。七十年代美国已经成功地把碳-碳复合材料用作洲际导弹“民兵-Ⅲ”弹头MK12A的鼻锥材料。航天飞机等新的应用,要求碳-碳复合材料不仅作为防热烧蚀材料而且在超低温下工作,因此研究碳-碳复合材料超低温下一些性能是有现实意义的。 碳-碳复合材料的常温或高温性能,国内外都已经进行了许多研究工作,并取得了很 Preface Carbon-carbon composites are primarily used as heat-resistant ablative materials. In the 1970s, the United States has successfully used carbon-carbon composites as nose cone materials for the intercontinental missile “militia-III” warhead MK12A. Space Shuttle and other new applications require carbon-carbon composite material not only as a heat-resistant ablation materials and work at ultra-low temperature, so the carbon-carbon composite materials under some properties of low temperature is of practical significance. Carbon-carbon composite materials at room temperature or high temperature performance, both at home and abroad have carried out a lot of research work, and made very