Abstract
In this work, GFs/ZX50 (graphite flakes/Mg–5Zn-0.5Ca) composites were successfully fabricated by ultrasonic-assisted semi-solid stirring followed by extrusion process. The microstructure observation demonstrates good effectiveness of hot extrusion on regulating the orientation of GFs. The GFs/ZX50 composites exhibit excellent thermal conductive property of ∼145.6–174.2 W/(m·K) accompanied with high yield strength of ∼386.8–407.8 MPa. The excellent strength-thermal conductivity synergy of GFs/ZX50 composites is mainly attributed to the highly orientated GFs, the clean Mg-graphite interface, the ultrafine grains and the MgZn2 nano-precipitates.
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