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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Sintering and Extrusion on the Microstructures and Mechanical Properties of a SiC/Al-Cu Composite
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Effects of Sintering and Extrusion on the Microstructures and Mechanical Properties of a SiC/Al-Cu Composite

机译：烧结和挤压对SiC / Al-Cu复合材料组织和力学性能的影响

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摘要

This article studied the effects of sintering and extrusion on the microstructures and mechanical properties of SiC particle reinforced Al-Cu alloy composite produced by powder metallurgy method. It has been shown that both extrusion and increasing sintering temperature can significantly improve the strength and plasticity of the composite. The extrusion and increase of the sintering temperature can break up the oxide coating on the matrix powder surfaces, decrease the number of pores, accelerate the elements’ diffusion and increase the density and particle interfacial bonding strength, thus significantly improve the mechanical properties of the composite. The strength and hardness of the composite increase and the elongation decreases with increasing the aging time at under-aged stage, while the strength and hardness start to decrease and the elongation starts to increase with increasing the aging time at over-aged stage due to the formation and growth of the secondary strengthening precipitates in the Al-Cu matrix.
机译：研究了烧结和挤压对粉末冶金法制备的SiC颗粒增强Al-Cu合金复合材料的组织和力学性能的影响。已经表明，挤出和提高烧结温度都可以显着提高复合材料的强度和可塑性。挤压和提高烧结温度可以破坏基体粉末表面的氧化物涂层，减少孔的数量，加速元素的扩散，增加密度和颗粒界面结合强度，从而显着提高复合材料的机械性能。 。随着老化时间的增加，复合材料的强度和硬度增加，而伸长率降低，而随着老化时间的增加，强度和硬度开始降低，伸长率开始增加。次生强化的形成和生长在Al-Cu基体中发生。

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