一、前言 复合材料是指由几种材料组合而成的一种新型材料,兼有各种组成材料的特点和优点。按复合材料力学性能,目前人们把比强度和比模量分别高于6.5×10~6cm、6.5×10~8m者称为高性能增强纤维,由它们制得的复合材料其 I. Introduction Composite materials refers to a combination of several materials from a new type of material, both the characteristics and advantages of a variety of constituent materials. According to the mechanical properties of composites, at present people regard specific strength and specific modulus higher than 6.5 × 10 ~ 6cm and 6.5 × 10 ~ 8m respectively as high-performance reinforcing fibers and their composite materials