▎ 摘　　要

Ti2AlNb-based composites with different contents of graphene nanoplatelets (GNPs) were prepared by high-energy ball milling and spark plasma sintering (SPS) under vacuum conditions. The effects of heat treatment on microstructures and mechanical behaviors of the composites were also evaluated. The results showed the layer structures of GNPs were retained in the composite and a small number of in situ TiC were formed during SPS. When GNPs contents increases to 0.2 wt.%, compared with pure Ti2AlNb alloy, the ultimate compressive strength (UCS) of the composites after solid solution (960 degrees C + 3 h) was increased by 13.35% and exceeded 1500 MPa. After further aging treatment (760 degrees C + 12 h), the UCS of the composites with 0.2 wt.% GNPs was reached to 1700 MPa.