用短纤维增强的金属基复合材料(MMC),其机械性能因增强纤维的强度、长度及取向不同有很大变化。用溶液浸渗法复合时,一般情况下必须有纤维预制件,然而,如果不考虑纤维的有序排列,则纤维预制件的制造比较容易。另外,控制预制件中短纤维的取向研究较少,也有的在复合后,进行热挤压等二次加工控制短纤维的取向。但采用脆 The mechanical properties of metal matrix composites reinforced with short fibers (MMC) vary greatly depending on the strength, length and orientation of the reinforcing fibers. When complexed by solution impregnation, fiber preforms are generally required, however, fiber preforms are easier to manufacture without regard to the orderly arrangement of the fibers. In addition, there are few studies on controlling the orientation of short fibers in the preform, and some may be subjected to secondary processing such as hot extrusion to control the orientation of the short fibers after compounding. But with crisp