Synthesis of ZnO micro-rods on the cell walls of open celled Al foam and their effect on the sound absorption behavior

2013 ◽  
Vol 91 ◽  
pp. 242-244 ◽  
Author(s):  
Yuelu Ren ◽  
Kun Wang ◽  
Bo Zhu ◽  
Xinfu Wang ◽  
Xingfu Wang ◽  
...  
Keyword(s):  
2014 ◽  
Vol 783-786 ◽  
pp. 1509-1512 ◽  
Author(s):  
Yun Jie Li ◽  
Yue Lu Ren ◽  
Zhen Dong Li ◽  
Fu Sheng Han

In the present study, needle like micro-Co3O4 rods were synthesized on the cell walls of open celled Al foam. The microstructure and phase composition of micro-rods and sound absorption properties of resultant samples were characterized. Compared with original Al foams, the modified ones showed enhanced sound absorption capacities, particularly at low frequencies, which were more obvious as the length of Co3O4 rods increased. The improvement is related to increased air flow resistance owing to increased roughness of the cell walls.


2012 ◽  
Vol 457-458 ◽  
pp. 253-256 ◽  
Author(s):  
Guang Chun Yao ◽  
Huan Liu ◽  
Bin Na Song

The aluminum foam materials have studied for the last 15 years in China, from laboratory experiments to industrialized scale. we can manufacture 800mm×2000mm aluminum foam board products. The essential parameters of our aluminum foam product are as follows, density: 0.3~0.6g/cm3; porosity: 77%~88%; pore diameter 5MPa. Some properties of aluminium foam materials were studied such as sound absorption, energy absorption, impact bending strength of aluminum (steel) plate/Al foam sandwich, etc.


2021 ◽  
Vol 179 ◽  
pp. 108049
Author(s):  
Chun-Won Kang ◽  
Haradhan Kolya ◽  
Eun-Suk Jang ◽  
Shaohua Zhu ◽  
Byung-Sook Choi

Author(s):  
Sang Youl Kim ◽  
Soo Han Park ◽  
Yong Su Um ◽  
Bo Young Hur

2005 ◽  
Vol 486-487 ◽  
pp. 468-471 ◽  
Author(s):  
Sang Youl Kim ◽  
Soo Han Park ◽  
Yong Su Um ◽  
Bo Young Hur

Aluminum foam with 0.2 g/cm3 density showed a good sound absorption property at frequencies higher than 2000 Hz. Compressed aluminum foam with an air gap of 50 mm or higher exhibited a very high sound absorption property near 400 Hz.


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