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Decoration of Ceramic Foams by Ceramic Nanowires via Catalyst‐Assisted Pyrolysis of Preceramic Polymers
Author(s) -
Fukushima Manabu,
Yoshizawa Yuichi,
Colombo Paolo
Publication year - 2012
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.1551-2916.2012.05341.x
Subject(s) - ceramic , materials science , pyrolysis , silicon carbide , polymer , silicon oxynitride , composite material , substrate (aquarium) , porosity , carbon fibers , nanowire , silicon , coating , chemical engineering , nanotechnology , silicon nitride , metallurgy , layer (electronics) , composite number , oceanography , engineering , geology
Silicon oxynitride ( Si 2 N 2 O ) nanowires ( NW s) were grown in situ on the cell walls of silicon carbide and alumina foams by coating preceramic polymers containing a Co‐based catalyst, followed by pyrolysis in nitrogen at temperatures ranging from 1250°C to 1450°C. The relationship between different processing factors (type of substrate and preceramic polymer, pyrolysis temperature) and the growth of NW s was examined. Varying processing factors were found to be effective for controlling the growth of NW s. The use of a preceramic polymer containing a high amount of carbon as well as silica impurities present in the SiC foams led to a larger amount of longer NW s, homogeneously covering the ceramic struts of the porous substrates. The overall morphology and growing mechanism of the NW s on ceramic foams were investigated.