一、引言碳纤维增强碳基体复合材料(CFRC)即碳/碳复合材料,是五十年代末问世并飞速发展起来的新型耐高温结构材料。由于它有独特、超群的物理力学性能、化学稳定性等,所以已成功地用于航空、航天、化工、医疗、核反应堆等国民经济的各个部门。就单质碳来说,由于它不属液态且升华 I. INTRODUCTION Carbon fiber reinforced carbon matrix composite (CFRC), carbon / carbon composite material, is a new type of high temperature structural material that has come out and developed rapidly in the late 1950s. Because of its unique, superior physical and mechanical properties, chemical stability, etc., it has been successfully used in various sectors of the national economy such as aviation, aerospace, chemical, medical, nuclear reactors. In the case of elemental carbon, since it is not liquid and sublimated