A novel processing method for fabricating high porosity microcellular ceramic foams for sound absorption applications has been developed. The strategy for fabricating the ceramic foams involves: (i) forming some shapes using a mixture of preceramic polymer and expandable microspheres by a conventional ceramic forming method, (ii) foaming the compact by heating, (iii) cross-linking the foamed body, and (iv) transforming the foamed body into ceramic foams by pyrolysis. By controlling the microsphere content and that of the base elastomer, it was possible to adjust the porosity with a very high open-cell content (ranging between 43 - 95%), high microcellular cell densities (9 × 108 - 1.6 × 109 cells/cm3) and desired expansion ratios (3 - 6 folds). Sound absorption testing has been performed using ASTM C-384 standard test. The preliminary results show that ceramic foams are candidate sound absorption materials.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Microcellular Ceramic Foams: Manufacturing and Study of Acoustical Properties


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2007 Noise and Vibration Conference and Exhibition ; 2007



    Publication date :

    2007-05-15




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Microcellular ceramic foams: manufacturing and study of acoustical properties

    Serry Ahmed,M.Y. / Wang,C. / Park,C.B. et al. | Automotive engineering | 2007


    Novel Acoustical Polyolefin Foams

    Park, Chung P. / Brucker, Michel / Burgun, Sandrine et al. | SAE Technical Papers | 2001


    Microcellular graphitic carbon foams for next generation structures and thermal management

    Anderson, D.P. / Kearns, K.M. / Klett, J.W. et al. | IEEE | 2000


    Pilot Benchmarking Study of Polyether Foams for Acoustical Applications

    Castillo, Manuel Sánchez | SAE Technical Papers | 2001


    Microcellular Graphitic Carbon Foams for Next Generation Structures and Thermal Management

    Anderson, D. P. / Kearns, K. M. / Klett, J. W. et al. | British Library Conference Proceedings | 2000