Preparation and Mechanical Properties of Copper Matrix Composites Reinforced by Carbon Nanotubes and Al₂O₃

Abstract

CNTs/Cu‐Al2O3 composites are successfully prepared by internal oxidation, chemical vapor deposition and spark plasma sintering (SPS) method. The influence of Al content (0.12 and 0.6 wt%) on the morphology of grown carbon nanotubes and the mechanical properties of composites are systematically studied. The results show that under the same growth process, more carbon nanotubes are obtained on the surface of the powders with 0.6 wt% Al content. The CNTs/Cu‐Al2O3 composites with 0.12 wt% Al content displays higher mechanical properties, the tensile strength is 280 MPa, and the micro‐hardness is 123.3 HV, which is increased by 40.7 and 78.2% in contrast with that of pure copper, respectively. Moreover, the electrical conductivity of CNTs/Cu‐Al2O3 (Al content is 0.12 wt%) composites is still at the high level of 83.2% IACS. This work uses chemical vapor deposition to improve the dispersion and interfacial bonding of CNTs in the matrix and increase the properties of the composites, which provides a new idea for the preparation of high strength metal matrix composites.

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“…The increasing CeO2 concentration in ZnO QDs can rationalize this dramatic size reduction, corroborating the Zener pinning mechanism that inhibits grain growth. [18,19] Moreover, HR-TEM images of [CeO2]/[ZnO] = 0.43 reveal the presence of lattice fringes with an inter-planar spacing of 0.31 and 0.26 nm, accredited to the (111) plane and (101) plane of CeO2 and ZnO, respectively. A clear interface between CeO2 and ZnO is https://doi.org/10.26434/chemrxiv-2024-nd6dp ORCID: https://orcid.org/0000-0002-6858-8395 Content not peer-reviewed by ChemRxiv.…”

Ceramic particles reinforced copper matrix composites manufactured by advanced powder metallurgy: preparation, performance, and mechanisms

“…The CNTs with high surface cleanness and high degree of graphitization are evenly distributed on the surface of composite powders and are well bound with the matrix. Subsequently, the SPS technique was employed to sinter CNTs/Al 2 O 3 /Cu bulk composites [82]. In bulk composites, the CNTs that are well bound with the Cu matrix and Al 2 O 3 particles play a synergistic role in enhancing the mechanical and electrical properties.…”