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Synthesis of Ceramic Bonded Carbon Using SiC ‐Coated Carbon Particles and Spark Plasma Sintering
Author(s) -
Nakamura Masaharu,
Tojo Tetsuro,
Naito Makio,
Miyamoto Yoshinari
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02708.x
Subject(s) - materials science , spark plasma sintering , ceramic , microstructure , sintering , carbon fibers , composite material , coating , particle (ecology) , composite number , oceanography , geology
A dense SiC coating on carbon particles has been developed using SiO powders as the Si source and a chemical vapor reaction method. The coating process was controlled by atmosphere, coating temperature, time, and weight ratio of SiO /C. The SiC ‐coated carbon particles, with a mean particle size of 20 μm, were sintered at 2000°C under 40 MP a for 20 min by spark plasma sintering ( SPS ). The product, called ceramic bonded carbon ( CBC ), had a unique microstructure, with a 3D micro‐network structure consisting of carbon particles covered with 1~5 μm thick SiC boundary layers. The sintering behavior of SiC / CBC s was analyzed in terms of the network formation of SiC boundary layers at over 1800°C and the grain growth of SiC at 2000°C. SiC / CBC s showed a bending strength of 150 MP a and a low shore hardness of 40. These materials could also be easily joined to SiC ceramics using SPS .