Mechanical behavior of Al /AL2O3p-SiCp hybrid composite fabricated by hot pressing method

• Published in: Materials letters Vol. 375; p. 137215
• Main Authors: Aghapour, Jafar, Roudini, Ghodratollah, Khosravi, Morteza
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-11-2024
• Subjects: Alumina; Composite materials; Hybrid composite; Metallic composites; Silicon carbide; Composite materials; Silicon carbide; Alumina; Metallic composites; Hybrid composite
• ISSN: 0167-577X
• DOI: 10.1016/j.matlet.2024.137215

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•Composites fabricated by hot pressing.•Composites strength is affected by hybrid reinforcements.•Composites strength is decreased by defects.
Hybrid particulate metal matrix composites with specific strength can be used in various applications. The mechanical properties of these composites can be improved by correctly choosing the type, volume fraction, size, and distribution of reinforcements and metal matrix. In this research, to make Al/Al2O3-SiC hybrid composites, aluminum chips were prepared by machining, and then the chips were coated with Al2O3 and SiC reinforcements by suspension method. For composite making, first, aluminum-coated chips were molded inside a steel mold and after heat treatment at 645 °C for 2 h the chips were hot pressed. The microstructure of the fabricated composites was examined by optical and SEM microscope, and then compression and tensile strength behavior were studied. The microstructural results showed a sound composite without any porosities and cracks. The hybrid composite with 12 wt% reinforcements showed high compressive strength (370 MPa).