Underwater sound absorption property of porous aluminum

被引：44

作者：

Cheng, GP ^{[1
]}

He, DP

Shu, GJ

机构：

[1] Zhengzhou Univ, Sch Appl Phys, Zhengzhou 450052, Peoples R China

[2] Southeast Univ, Dept Mat Sci, Nanjing 210096, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2001年 / 179卷 / 2-3期

关键词：

liquid metal infiltration; porous aluminum; acoustic property;

D O I：

10.1016/S0927-7757(00)00656-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Porous aluminum was prepared by negative pressure infiltration process using removable granules. Underwater sound absorption coefficient a of the porous aluminum was determined by a pulse tube method. The relationship between a and pore structure of porous aluminum was studied. a increases remarkably with the decrease of pore diameter from 5 to 2 mm. It shows that there is an optimal porosity (75-80%) with which porous aluminum gives the best sound absorption. alpha increases with the sample's thickness L. The thin sample doesn't absorb sound (such as L = 15 mm). (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：191 / 194

页数：4