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Fabrication and heat treatment of graphene nanoplatelets reinforced aluminium nanocomposites

机译：石墨烯纳米孔增强铝纳米复合材料的制造和热处理

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摘要

The present work reports fabrication of graphene nanoplatelets (0.1, 0.3 and 0.5 wt%) reinforced aluminium matrix naocomposites through non-contact ultrasonic vibrations assisted stir casting process. Microstructure, tensile strength, microhardness and tribological properties of fabricated samples have been examined. The influence of T6 heat treatment on mechanical properties of developed samples was also investigated. Incorporation of graphene in base matrix resulted in grain refinement and an increase of about 37% in ultimate tensile strength and 27% in micro hardness of cast composites. Strength and grain refining action of graphene was attributed as the reason for increment in mechanical properties. Heat treatment causes further improvement of about 83% and 34% in ultimate tensile strength and microhardness of fabricated composites as compared to heat treated base matrix. The enhancement in properties of heat-treated samples was attributed to age hardening. Addition of self-lubricating graphene in aluminium matrix resulted in improved wear behavior of prepared composites. Reduction of about 24% in coefficient of friction of graphene-aluminium composites as compared to base matrix is reported.
机译：通过非接触超声振动辅助搅拌铸造方法，本作工作报告了石墨烯纳米孔（0.1,0.3和0.5wt％）增强铝基基质复合材料的制备。研究了制造样品的微观结构，拉伸强度，显微硬度和摩擦学性质。还研究了T6热处理对开发样品力学性能的影响。将石墨烯掺入碱基中导致晶粒细化，最终拉伸强度的增加约37％，铸造复合材料的微硬度为27％。石墨烯的强度和晶粒精炼作用归因于机械性能递增的原因。与热处理的基质基质相比，热处理导致较大拉伸强度和制造复合材料的微硬度进一步提高约83％和34％。热处理样品的性质的增强归因于年龄硬化。在铝基质中添加自润滑石墨烯导致制备复合材料的改善行为。报道，与碱基基质相比，石墨烯 - 铝复合材料的摩擦系数减少约24％。

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