A STUDY ON SOUND-ABSORPTION ABILITY OF CLOSED-CELL ALUMINIUM FOAMS

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materiali in tehnologije Pub Date : 2023-10-03 DOI:10.17222/mit.2023.741

Vaddi Thulasikanth, Padmanabhan Raghupathy

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Abstract

Metallic foams have gained popularity in industrial applications and research due to their unique mechanical properties combined with light weight, vibroacoustic damping and high-temperature resistance. Generally, closed-cell foams have poor sound absorption properties due to their closed cellular structure when compared to open-cell foams. This paper investigates a new composite closed-cell foam for its acoustic properties. The new closed-cell aluminium fly-ash foam was made with liquid processing, using calcium carbonate (CaCO3) as the blowing agent. The effects of the fly-ash content on the cell morphology and mechanical properties were analyzed. Acoustic studies were conducted on the prepared closed-cell foam using the impedance tube method. Samples were prepared in different ways to determine the effects of the changing parameters. The results of quasi-static compression and microstructural analyses of two different combinations of the foam revealed small pore sizes with varying relative densities and compressive strengths. It is evident from the acoustic studies that the foams are capable of improved sound absorption of medium and high frequencies.

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闭孔泡沫铝吸声性能的研究

金属泡沫由于其独特的机械性能，结合了重量轻、振动声阻尼和耐高温等特点，在工业应用和研究中得到了广泛的应用。与开孔泡沫相比，闭孔泡沫的闭孔结构使其吸声性能较差。研究了一种新型复合闭孔泡沫材料的声学性能。以碳酸钙(CaCO3)为发泡剂，采用液体法制备了新型闭孔铝粉煤灰泡沫。分析了粉煤灰掺量对细胞形态和力学性能的影响。采用阻抗管法对所制备的闭孔泡沫进行了声学研究。以不同的方式制备样品，以确定参数变化的影响。两种不同组合泡沫的准静态压缩和微观结构分析结果表明，相对密度和抗压强度不同，孔隙尺寸较小。从声学研究中可以明显看出，泡沫材料能够改善中高频的吸声效果。

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来源期刊

Materiali in tehnologije 工程技术-材料科学：综合

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal MATERIALI IN TEHNOLOGIJE/MATERIALS AND TECHNOLOGY is a scientific journal, devoted to original papers and review scientific papers concerned with the areas of fundamental and applied science and technology. Topics of particular interest include metallic materials, inorganic materials, polymers, vacuum technique and lately nanomaterials.