Acoustic absorption properties of open-cell Al alloy foams with graded pore size

被引：40

作者：

Huang Ke ^{[1
]}

Yang Donghui ^{[2
]}

He Siyuan ^{[3
]}

He Deping ^{[1
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Adv Metall Mat, Nanjing 211189, Peoples R China

[2] HoHai Univ, Coll Mech & Mat, Nanjing 210098, Peoples R China

[3] Southeast Univ, Sch Biol Sci & Med Engn, State Key Lab Bioelect, Nanjing 210096, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2011年 / 44卷 / 36期

关键词：

SOUND-ABSORPTION;

D O I：

10.1088/0022-3727/44/36/365405

中图分类号：

O59 [应用物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

By adjusting the size of preform particles and their stacking routes, the open-cell Al alloy foams with graded pore size were prepared by the melt infiltration method. The effects of pore structures and air gap on the acoustic absorption properties of open-cell Al alloy foams have been investigated. The results show that whether there is an air gap, the open-cell Al alloy foam with graded pore size exhibits better acoustic absorption properties (maximum absorption coefficient, noise reduction coefficient (NRC) and half-width of the absorption peak) than the foams with uniform pore size. The typical maximum absorption coefficient, NRC and half-width of the absorption peak are 0.96-0.99, 0.40-0.64 and 1600-3200 Hz, respectively.

引用

页数：6