نوع مقاله : مقاله پژوهشی
نویسندگان
دانشگاه تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Hybrid composites provide a combination of properties such as tensile modulus, compressive strength and wear resistance, which cannot be obtained in ordinary composite materials. Usaully, these composites involves of one or two ex-situ and in-situ reinforce particles. In this study, the hybrid composite AZ91/Mg2Si/5wt%SiCP with micron-sized SiC particles was selected and, 1 and 2wt% nano-sized SiC were added to this composite. The present study investigated the effect of bimodal size SiC particles on the microstructure, mechanical, and wear properties of the cast and extruded composites and compared to the composites with micron-sized SiC reinforcement and base alloy. The present of Mg2Si and nano-sized of SiC particles had positive influence on the microstructure refinement and decrement of the grain size. The results show that the adding of 1 and 2wt% nano-sized SiCp significantly improved the microstructure, mechanical properties and wear resistance of the AZ91 alloy after hot extrusion. Using a less amounts of micro particles along with nano particles is a proper choice to improve mechanical properties and wear resistance.
کلیدواژهها [English]
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