Preparation and Sound Absorption Coefficient Test of Aluminum Foam with CaO Granules Infiltrating Agent

Abstract:

Three kinds of aluminum foam of different pore sizes were prepared with a tailor-made low-pressure infiltration device. CaO granules in three sizes (0.45~0.71mm,0.71~090mm and 1.25~1.60mm) were selected as infiltrating agents. The processing parameters were as follows: granules preheat temperature of 700 °C,infiltration pressure of 0.04 MPa and aluminum liquid temperature of 720 °C. In order to improve the removal performance and porosity, mixture of CaO powder of finer than 300 mesh and pure alcohol was mixed uniformly with granules, which made the slurry-coating granules conformal contacts rather than point contacts as in the traditional infiltration method. The testing results show that among all aluminum foam specimens tested with transfer function methods, two kinds have high sound absorption coefficient in low frequency (250~1600Hz).

• Periodical: Materials Science Forum (Volume 933)
• Pages: 55-60
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.933.55
• Online since: October 2018
• Authors: yong zhang*, Zong Min Chen, Zhao Jun Wang, Jing Hui Liu
• Keywords: Aluminum Foam, CaO Granules, Sound Absorption Coefficient

References

[1] Miao Wang, Lucai Wang. Research status and development prospects of aluminum foam and composite structures, Materials review A: Review article 29(2015)81-84.

[2] Yong Zhang, Jinghui Liu, Zhaojun Wang, Manufacturing aluminum foam by CaO granules and low-pressure infiltration method, Foundry Technology 37(2016)2657-2659.

[3] Sararat Mahasaranon, Kirill V. Horoshenkov, Amir Khan, The effect of continuous pore stratification on the acoustic absorption in open cell foams, J. Appl. Phys. 111(2012)084901-1/11.

DOI: 10.1063/1.3701710

[4] Yong Zhang, Youxi Wang, Chunming Zhang, Study on the technological parameter of penetrating casting for foam Al alloys, Foundry Technology 31(2010)720-722.

[5] David Oliva , Valtteri Hongisto, Sound absorption of porous materials–Accuracy of prediction methods, Applied Acoustics 74(2013)1473-1479.

DOI: 10.1016/j.apacoust.2013.06.004

[6] Dong Guan, Jiu Hui Wu, Jiangling Wu, Acoustic performance of aluminum foams with semiopen cells, Applied Acoustics 87(2015)103-108.

DOI: 10.1016/j.apacoust.2014.06.016

[7] Yunjie Li, Zhendong Li, Fusheng Han, Air flow resistance and sound absorption behavior of open-celled aluminum foams with spherical cells, Procedia Materials Science 4(2014)187-190.

DOI: 10.1016/j.mspro.2014.07.591

[8] Yunjie Li, Xinfu Wang, Xingfu Wang, Sound absorption characteristics of aluminum foam with spherical cells, J. Appl. Phys. 110(2011)113-115.

[9] Xiangyi Bu, Sound Absorption property of alumiun alloy foam used for noise reduction in construction, Foundry Technology.36(2015)1934-(1935).

[10] Dong Guan, Jiu Hui Wu ,Li Jing, A statistical method for predicting sound absorbing property of porousmetal materials by using quartet structure generation set, Journal of Alloys and Compounds 626(2015)29-34.

DOI: 10.1016/j.jallcom.2014.11.159

[11] Yong Zhang, Low-pressure infiltrating technology of foam aluminum and its familiar defects, Foundry Technology 25(2004)596-599.