Influence of compaction temperature on the mechanical properties and micro morphology of Cu/CNTs composites prepared by electromagnetic impacting

Carbon nanotubes reinforced copper-based composites (Cu/CNTs) had excellent physical properties and were widely used in industrial production and manufacturing. In this work, the mechanical properties and micro mor-phology of Cu/CNTs composites prepared by electromagnetic powder compaction (EMPC) at 25-200 degrees C were in-vestigated. Results showed that the relative density, hardness and compressive stress of Cu/CNTs compacts gradually increased as the temperature increased. The growth trend had an obvious turning point at 150 degrees C. The maximum relative density and compressive stress were 95.74% at 200 degrees C and 520.95 MPa at 150 degrees C, respec-tively. The micro morphology of the end faces and cross sections became denser. The temperature had a weak-ening effect on the compressive strain, but the opposite was true for compressive stress. The optimal temperature was 150 degrees C. The relationships between temperature and compressive stress and strain of Cu/CNTs composites were revealed. (c) 2021 Published by Elsevier B.V.