原位自生法制备石墨烯增强镁基复合材料的工艺和性能

采用原位自生法制备石墨烯增强的镁基复合材料，并使用Raman、XPS、XRD、SEM和TEM以及电子万能拉伸试验机等手段表征了原位生成的石墨烯的微观形貌和复合材料的力学性能。结果表明:进行原位反应可制备石墨烯增强的镁基复合材料，反应温度越高原位生成的石墨烯的质量越好，制备出的复合材料的性能越高。反应温度为780℃时复合材料的力学性能达到最大值，其屈服强度、抗拉强度和延伸率分别为245 MPa、340 MPa和6.7%，比基体的力学性能分别提高了40%、21.4%和48.8%。

Process and Properties of Graphene Reinforced Mg-based Composite Prepared by In-situ Method

The graphene reinforced Mg-based composite material was prepared by in-situ method, and then the in-situ generated graphene and the prepared composite were characterized by means of Raman, XPS, XRD, SEM, TEM and electronic universal tensile testing machine. The results show that graphene-reinforced Mg-based composites can be prepared via in-situ reaction. As the reaction temperature increases the quality of the in-situ generated graphene increases, and the performance of the resulted composites is better. When the reaction temperature is 780℃ the mechanical properties of the composite material reach the maximum, namely, its yield strength, tensile strength and elongation are 245 MPa, 340 MPa and 6.7%, respectively. The yield strength, tensile strength and elongation increased by 40%, 21.4% and 48.8%, respectively, compared with the plain Mg-alloy.