To solve the problem of graphene aggregation in Mg-based alloys

the method of electrostatic attraction was adopted to mix graphene oxide prepared by Hummers method with ZK61 alloy powder which was picklled

and ZK61 Mg-based composites were prepared by powder thixoforming technology.The effects of preparation parameters on the dispersion effects of graphene oxide in matrix and the mechanical properties of the composites prepared were analyzed.The results reveal that after 0.1% graphene oxide is treated by ultrasonic at 840 Wfor 40 min and then mixed with magnesium alloy powder after acid pickling at 1%concentration

graphene oxide is dispersed uniformly in the matrix after thixoforming.The ultimate tensile strength and elongation of the composites are increased by 42.97% and by 6.76%

respectively

compared with those of the matrix alloy

while the change of hardness can be ignored.