TY - JOUR
T1 - Structure and oxidation resistance of micro-cellular Si-SiC foams derived from natural resins
AU - Amaral-Labat, G.
AU - Zollfrank, C.
AU - Ortona, A.
AU - Pusterla, S.
AU - Pizzi, A.
AU - Fierro, V.
AU - Celzard, A.
N1 - Funding Information:
The authors gratefully acknowledge the financial support of the CPER 2007-2013 “Structuration du Pôle de Compétitivité Fibres Grand'Est” (Competitiveness Fibre Cluster), through local (Conseil Général des Vosges), regional (Région Lorraine), national (DRRT and FNADT) and European (FEDER) funds. The authors gratefully also acknowledge Dr. Tobias Fey, FAU Erlangen—Glass and Ceramics for his technical assistance and many helpful discussions, and the company Erbicol for having performed the siliconization process in their labs.
PY - 2013/3
Y1 - 2013/3
N2 - Microcellular Si-SiC porous ceramics were prepared from rigid foams derived from tannin-based natural resins. Such natural foams were used either as such, i.e. in the green state, or after conversion at 900 °C into vitreous cellular carbon foams. Various preparation methods were tested: replica with preceramic polymers followed by pyrolysis, liquid silicon infiltration (LSI) and vapour silicon infiltration (VSI). Depending on the method, very different materials have been obtained, whose morphology and microstructure have been investigated by SEM, XRD and Raman, whereas oxidation resistance has been evaluated by weight loss measurements in dry air at high temperature. The resulting porous ceramics' properties were discussed in relation to the preparation methods and their morphology and conversion of tannin-based foams into SiC.
AB - Microcellular Si-SiC porous ceramics were prepared from rigid foams derived from tannin-based natural resins. Such natural foams were used either as such, i.e. in the green state, or after conversion at 900 °C into vitreous cellular carbon foams. Various preparation methods were tested: replica with preceramic polymers followed by pyrolysis, liquid silicon infiltration (LSI) and vapour silicon infiltration (VSI). Depending on the method, very different materials have been obtained, whose morphology and microstructure have been investigated by SEM, XRD and Raman, whereas oxidation resistance has been evaluated by weight loss measurements in dry air at high temperature. The resulting porous ceramics' properties were discussed in relation to the preparation methods and their morphology and conversion of tannin-based foams into SiC.
KW - Precursors: Microstructure-final
KW - SiC
KW - Thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=84870295657&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2012.08.032
DO - 10.1016/j.ceramint.2012.08.032
M3 - Article
AN - SCOPUS:84870295657
SN - 0272-8842
VL - 39
SP - 1841
EP - 1851
JO - Ceramics International
JF - Ceramics International
IS - 2
ER -