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Conversion of Oak to Cellular Silicon Carbide Ceramic by Gas‐Phase Reaction with Silicon Monoxide
Author(s) -
Vogli Evelina,
Mukerji Joydeb,
Hoffman Christiane,
Kladny Ralf,
Sieber Heino,
Greil Peter
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00822.x
Subject(s) - materials science , silicon carbide , ceramic , porosity , silicon monoxide , inert gas , silicon , annealing (glass) , chemical engineering , gas phase , composite material , chemistry , metallurgy , engineering
Oak has been converted to a porous biocarbon template by annealing in an inert atmosphere above 800°C. Subsequent infiltration with gaseous SiO at 1550–1600°C under flowing argon of atmospheric pressure finally resulted in the formation of a porous, cellular β‐SiC ceramic. The conversion retains the biomorphic cellular morphology of oak tissue. While pores in the cell walls with a diameter less than ∼1 μm vanished, two distinct pore channel maxima representing tracheidal cells and large vessels remained in the SiC ceramic. Depending on the cellular morphology of different kinds of wood, e.g., strut thickness and pore size distribution, gas‐phase conversion to single‐phase β‐SiC can be used to manufacture cellular ceramics with a wide range of pore channel diameters.