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Synthesis of Mesoporous Carbon‐Bonded TiC/SiC Composites by Direct Carbothermal Reduction of Sol–Gel Derived Monolithic Precursor
Author(s) -
Zhong Jie,
Liang Shuquan,
Wang Kun,
Wang Huanting,
Williams Tim,
Huang Han,
Cheng YiBing
Publication year - 2011
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.1551-2916.2011.04662.x
Subject(s) - carbothermic reaction , materials science , furfuryl alcohol , composite material , crystallinity , silicon carbide , nanocrystalline material , ceramic , titanium carbide , mesoporous material , carbon fibers , carbide , chemical engineering , composite number , nanotechnology , catalysis , chemistry , biochemistry , engineering
Mesosporous carbon‐bonded titanium‐carbide/silicon‐carbide ( C‐TiC/SiC ) ceramics with a high specific surface area (221 m 2 /g), ultra fine grains (10–50 nm), and high crystallinity were synthesized from direct carbothermal reduction (1100°–1450°C) of monolithic Ti–Si–O–C precursors made from controlled sol–gel process. The nano‐sized carbide grains are bonded into bulk materials by poly(furfuryl alcohol) ( PFA ) derived nanocrystalline carbon framework by “bridge,” “entanglement,” and “adhesive” effects. Graphenes were found to grow on {111} planes of TiC grains but this was not observed for SiC . The bonding of graphitic carbon layers on carbide grains support the nanostructure and also result in the desired combination of functional and mechanical properties.