Acoustic properties of closed-cell aluminum foams with different macrostructures

作     者：Xingchuan Xia Zan Zhang Weimin Zhao Chong Li Jian Ding Chenxi Liu Yongchang Liu 

作者机构：State Key Lab of Hydraulic Engineering Simulation and Safety School of Materials Science & Engineering Tianjin University School of Materials Science & Engineering Hebei University of Technology 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2017年第33卷第11期

页      面：1227-1234页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported financially by the National Natural Science Foundation of China (Nos. 51501053, 51325401 and U1660201) the National Magnetic Confinement Fusion Energy Research Program (No. 2014GB125006) Science and Technology Plan Projects of Hebei Province (No. 15211026) 

主　　题：Closed cell aluminum foam Sound absorption Sound insulation Macrostructure 

摘      要：As structural materials, closed-cell aluminum foams possess obvious advantages in product dimension, strength and process economics compared with open cell aluminum foams. However, as a kind of structure-function integration materials, the application of closed-cell aluminum foams has been restricted greatly in acoustic fields due to the difficulty of sound wave penetration. It was reported that closed-cell foams with macrostructures have important effect on the propagation of sound waves. To date, the relationship between macrostructures and acoustic properties of commercially pure closedcell aluminum foams is ambiguous. In this work, different perforation and air gap types were designed for changing the macrostructures of the foam. Meanwhile, the effect of macrostructures on the sound absorption coefficient and sound reduction index were investigated. The results showed that the foams with half-hole exhibited excellent sound absorption and sound insulation behaviors in high frequency range（〉2500 Hz）. In addition, specimens with air gaps showed good sound absorption properties in low frequency compared with the foams without air gaps. Based on the experiment results, propagation structural models of sound waves in commercially pure closed-cell aluminum foams with different macrostructures were built and the influence of macrostructures on acoustic properties was discussed.