Abstract
To reduce the cost of nanocomposites and improve the dispersion of nanoparticles, Al2O3np/SiCnp/Al hybrid nanocomposites are fabricated by combining liquid-state blowing and ultrasonic-assisted casting. The average grain size of the matrix decreases to 39 μm in Al2O3np/SiCnp/Al, which shows improvements of approximately 118% and 26% as compared to those of Al2O3np/Al and SiCnp/Al, respectively. X-ray Diffractometer (XRD) results confirm the presence of SiCnp and Al2O3np in hybrid nanocomposites. The dispersed SiCnp and Al2O3np are homogeneously distributed in the matrix and no clusters consisting of SiCnp and Al2O3np exist in the microstructure. Theoretical analyses also verify that there is little possibility for clusters to form in the melt. Good bonding between nanoparticles and Al is demonstrated. Neither cavities nor reaction products exist at the interface. The ductility and the strength of Al2O3np/SiCnp/Al are improved. The improvement in yield strength of Al2O3np/SiCnp/Al, in comparison with that of A356, is about 45%.
Highlights
IntroductionIn light of the desired chemical, physical and mechanical properties, the reinforcement and the matrix are selected for nanocomposite preparation
One of the great advantages of nanocomposites is their manufacturability
X-ray Diffractometer (XRD) results verified the presence of SiCnp and Al2 O3np in hybrid nanocomposites
Summary
In light of the desired chemical, physical and mechanical properties, the reinforcement and the matrix are selected for nanocomposite preparation. High-strength lightweight nanocomposites become the focus of new material development. A lot of research is conducted on Al matrix nanocomposites, which have larger ratios of strength to weight than that of aluminum alloys. Compared with the conventional composites, the tensile strength and ductility of nanocomposites are simultaneously improved at both room and elevated temperatures [3]. Nanoparticles result in the enhancement of the hot-tearing resistance of Al–Cu alloy [5]. If the distribution of nanoparticles is uniform throughout the matrix, the increase in strength from the Orowan mechanism can be obtained [6]. It is difficult to achieve the uniform distribution of nanoparticles in the matrix. The van der Waals forces between nanoparticles are attractive
Sign-in/Register to view highlights & summary 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.
