Achieving homogeneous dispersion of GNPs in Ti-based nanocomposites via high-pressure torsion

Authors：Duan, H. Q.; Zhang, H. M.^*; Cheng, X. W.; Chen, P. W.; Mu, X. N.^*; Xue, K. M.; Zhou, Y. F.

Source：Materials Letters, 2022, 306: 130948.

DOI：10.1016/j.matlet.2021.130948

• Metallic composites
• Graphene nanoplates
• High pressure torsion
• Microstructure

How to obtain the uniform dispersion and prohibit severe interfacial reaction simultaneously were the two important problems in graphene nanoplatelets (GNPs) reinforced Ti matrix (GNPs/Ti) composites. In this study, GNPs/Ti nanocomposites were fabricated by using high-pressure torsion (HPT) technique at ambient temperature. The microstructure evolution of the GNPs/Ti nanocomposites during HPT processing were investigated. The results show that the GNPs were homogeneously dispersed under the HPT shear force. Moreover, their intrinsic structure was well-retained with no interfacial reaction. The microhardness of HPT 1wt% GNPs/Ti nano composite was increased by 18.6% compared to that of HPT pure Ti processed at 5GPa-5r.

• Institution
  北京理工大学