Abstract
The present work reports on a study of improving mechanical properties and thermo-physical properties of a 7075Al hybrid composite (50SiC+5Cr) simultaneously, which was reinforced by a mixture of 50 vol% SiCp and 5 vol% Cr particles. Cr particles were well reserved in the 7075Al hybrid composite following the squeeze casting process. Compared with the 50 vol% SiCp/7075Al composite (50SiC), the ultimate tensile strength (UTS) and elongation (EL) of the 7075Al hybrid composite were increased by ∼19% and ∼15%, respectively. Additionally, the 7075Al hybrid composite exhibited higher thermal conductivity and lower thermal expansion than those of 50 vol% SiCp/7075Al and 55 vol% SiCp/7075Al (55SiC). Interestingly, fracture mechanism analyses revealed that the 7075Al hybrid composite showed a mixed morphologic feature of ductile-brittle fracture model while the 50 vol% SiCp/7075Al composite exhibited an evident brittle fracture model. The interface conductance (hc) of the 50SiC+5Cr composite is higher than those of the 50SiC and 55SiC composites. The good interface between Cr particles and the Al matrix and the reduced dislocation density present in the Al matrix are responsible for the excellent mechanical properties and good thermo-physical properties of the 50SiC+5Cr composite.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
