Using M40 J carbon fiber braided laminated puncture structure preform

ZL301 as matrix alloy

four kinds of laminated puncture C

f

/Al composites were prepared by vacuum pressure infiltration method. The effects of Z-direction puncture structure parameters on microstructure

phase composition and tensile properties of C

f

/Al composites were investigated

and their fracture deformation behavior and tensile fracture morphology were analyzed. The results show that the Z-direction puncture structure parameters have significant influence on the microstructure and properties of C

f

/Al composites

where the average tensile strength of 1

#

（single strand

3 mm/pin） and 2

#

（single strand

4 mm/pin）

3

#

（double strand

3 mm/pin）

4

#

（double strand

4 mm/pin） C

f

/Al composites reach 623

353.3

650.2 and 473 MPa

respectively. In addition

tensile strength of 2

#

composites is the lowest among the four structures

while that of 4

#

（double strand

4 mm/pin） C

f

/Al composite is the highest value which is about twice as much as that of 2

#

composites. The C

f

/Al composites with a distance of 3 mm/needle presents less micro infiltration defects and the higher tensile strength. The Z-direction yarn failure delamination phenomenon is easy to appear when single strand pierced yarn is stretched longitudinally. According to the deformation and fracture behavior of C

f

/Al composites

the tensile failure process can be divided into three stages: the stage of fiber and matrix bearing

the stage of fiber bearing the load mainly

and the stage of fracture failure.