TY - JOUR
T1 - Mechanical Properties of Silicon Oxycarbide Ceramic Foams
AU - Colombo, Paolo
AU - Hellmann, John R.
AU - Shelleman, David L.
PY - 2001/10
Y1 - 2001/10
N2 - The mechanical properties of ceramic foams obtained through a novel process that uses the direct foaming and pyrolysis of preceramic polymer/polyurethane solutions were investigated. The elastic modulus, flexural strength, and compressive strengths were obtained for foams in the as-pyrolyzed condition; values up to 7.1 GPa, 13 MPa, and 11 MPa, respectively, were obtained. The strength of the foam was virtually unchanged at temperatures up to 1200°C in air; however, long-term exposure at 1200°C led to a moderate degradation in strength, which was attributed to the evolution of intrastrut porosity during the oxidation of residual free carbon, as well as devitrification of the foams struts.
AB - The mechanical properties of ceramic foams obtained through a novel process that uses the direct foaming and pyrolysis of preceramic polymer/polyurethane solutions were investigated. The elastic modulus, flexural strength, and compressive strengths were obtained for foams in the as-pyrolyzed condition; values up to 7.1 GPa, 13 MPa, and 11 MPa, respectively, were obtained. The strength of the foam was virtually unchanged at temperatures up to 1200°C in air; however, long-term exposure at 1200°C led to a moderate degradation in strength, which was attributed to the evolution of intrastrut porosity during the oxidation of residual free carbon, as well as devitrification of the foams struts.
UR - http://www.scopus.com/inward/record.url?scp=0035497680&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035497680&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.2001.tb00996.x
DO - 10.1111/j.1151-2916.2001.tb00996.x
M3 - Article
AN - SCOPUS:0035497680
SN - 0002-7820
VL - 84
SP - 2245
EP - 2251
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 10
ER -