Study on mechanical properties and wear behavior of in-situ synthesized CNTs/ CuCrZrY composites prepared by spark plasma sintering

Abstract

The Cr particles catalyst uniformly distributed on the surface of CuCrZrY composite powders were prepared by solid solution and aging treatment, the treated CuCrZrY composite powders were used to in-situ synthesis of CNTs/CuCrZrY composite powders by water-assisted chemical vapor deposition (CVD), which improved the wettability and dispersion of CNTs and Cu matrix. The CNTs/CuCrZrY composites were prepared by spark plasma sintering (SPS), and 60% deformation was performed on the hot rolling mill. The results shown that the tensile strength of CNTs/CuCrZrY composites was improved to 423 MPa, which was 53% and 14% higher than Cu and CuCrZrY composites, respectively. The softening resistance temperature of CNTs/CuCrZrY composites reaching 670 °C, and the thermal stability of CNTs/CuCrZrY composites had been significantly improved. The sliding friction coefficient between the CNTs/CuCrZrY composites and GCr15 steel balls at 20 °C and 300 °C were 0.254 and 0.290, which were 55.9% and 56.7% lower than Cu, respectively.