Study on damping capacity and dynamic Young's modulus of aluminium matrix composite reinforced with SiC particles

Ciência & Tecnologia dos Materiais Pub Date : 2017-01-01 DOI:10.1016/j.ctmat.2016.08.003

S. Madeira, G. Miranda, D. Soares, F.S. Silva, O. Carvalho

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引用次数: 10

Abstract

The development of high damping materials for noise reduction and attenuation of vibration on structural applications, such as automotive and aerospace industries, has been investigated. This experimental study is concerned with the damping capacity (tan delta) and dynamic Young's modulus (|E*|) of Silicon carbide (SiC) reinforced aluminium (Al) matrix composite. AlSi-SiCp composite was produced by hot pressing technique. Damping capacity and dynamic Young's modulus of composite and unreinforced AlSi alloy were studied using a dynamic mechanical analyser (DMA), over a temperature range of room temperature-400 °C (during heating and cooling phases), at 1 and 20 Hz. AlSi-SiC_p composite showed higher damping capacity and dynamic Young's modulus than the AlSi unreinforced alloy. Furthermore, damping capacity was found to increase with temperature, while modulus decreases. The possible damping mechanisms are presented and discussed.

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SiC颗粒增强铝基复合材料阻尼性能及动态杨氏模量研究

高阻尼材料的发展，以减少噪音和振动的结构应用，如汽车和航空航天工业的衰减进行了研究。本实验研究了碳化硅(SiC)增强铝(Al)基复合材料的阻尼能力(tan delta)和动态杨氏模量(|E*|)。采用热压法制备了AlSi-SiCp复合材料。采用动态力学分析仪(DMA)，在室温-400°C(加热和冷却阶段)、1 Hz和20 Hz的温度范围内，研究了复合材料和未增强AlSi合金的阻尼能力和动态杨氏模量。AlSi- sicp复合材料的阻尼性能和动态杨氏模量均高于未增强AlSi合金。阻尼能力随温度的升高而增大，模量随温度的升高而减小。提出并讨论了可能的阻尼机理。

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Ciência & Tecnologia dos Materiais

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