The vacuum gas pressure infiltration was performed for preparing the unidirectional continuous Cf/Al composite with the volume fraction of 40%

of which the reinforced material was M40 graphite fiber and the matrix alloys selected ZL102

ZL114 A

ZL205Aand ZL301 alloys

respectively

to explore effects of matrix alloy on the relative density and tensile strength of continuous Cf/Al composites.The results show that at the preheating temperature

infiltration temperature

impregnation pressure and holding time of 550 ℃

730 ℃

7 MPa and 20 min

respectively

among four kinds of composites

the relative density of continuous M40/ZL301 composites reaches 99.9% with most uniform distribution of fibers in the matrix.Meanwhile

its tensile strength reaches 670.2 MPa

compared with that of M40/ZL102 composites

increased by 639%.The tensile fracture is significantly different from the other three kinds of brittle fracture of composites

exhibiting typical ductile fracture.