Development of Aluminum–Copper–CNT Composites through a Tubular Metal Additive Extrusion Technique

Aluminum matrix composites (AMCs) reinforced with copper (Cu) and carbon nanotubes (CNTs) are emerging as high-performance materials for advanced engineering applications due to their superior thermal conductivity, strength, and wear resistance. However, conventional manufacturing methods face challenges in achieving uniform reinforcement distribution, defect-free structures, and complex geometries such as tubular components. This study proposes a novel Tubular Metal Additive Extrusion (TMAE) technique for the fabrication of Al–Cu–CNT composite tubes. CNTs were synthesized using the arc discharge method, followed by composite preparation via hot extrusion at 550°C and 8 MPa pressure. In the present work a review of the proposed study and synthesis of multiwalled carbon nanotubes is presented.