A multiscale experimental analysis of mechanical properties and deformation behavior of sintered copper–silicon carbide composites enhanced by high-pressure torsion

Abstract Experiments were conducted to investigate, within the framework of a multiscale approach, mechanical enhancement, deformation and damage behavior copper–silicon carbide composites (Cu–SiC) fabricated by spark plasma sintering (SPS) combination SPS with high-pressure torsion (HPT). The properties metal–matrix determined at three different length scales corresponding macroscopic, micro- nanoscale. Small punch testing was employed evaluate strength macroscopic scale. Detailed analysis microstructure evolution related HPT, sample failure fractured specimens using scanning transmission electron microscopy. A microstructural study revealed changes in for samples processed HPT an explanation this provided performed copper metal–ceramic interface microtensile hardness each composite component, metal matrix, interface, ceramic reinforcement, measured nano-indentation. results confirm advantageous effect large plastic on Cu–SiC demonstrate impact these separate components type.