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Open-celled silicon carbide (SiC) foam has been proven of a promising underwater acoustic absorption material. However, further improvement of its sound absorption capacity especially at low frequency is restricted by the acoustic impedance mismatch between the foam material and the water surrounding it. How to tailor the existing SiC foam in order to achieve an optimized impedance match is a key...
Silicon carbide (SiC) foam prepared by polymer pyrolysis combined with molten silicon reactive infiltration (MRI) process was experimentally studied for the first time regarding its underwater acoustic absorption coefficient (α) mainly over low and middle frequency range (200–4000Hz). The relationship between α and the pore structure of SiC foam including pore size (d) and foam thickness (t) was studied...
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