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Biomorphic Silicon Nitride Ceramics with Fibrous Morphology Prepared by Sol Infiltration and Reduction–Nitridation
Author(s) -
Luo Min,
Gao JiQiang,
Yang JianFeng,
Fang JunZhuo,
Wang Zheng
Publication year - 2007
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.1551-2916.2007.02049.x
Subject(s) - sintering , silicon nitride , carbothermic reaction , materials science , ceramic , microstructure , infiltration (hvac) , chemical engineering , morphology (biology) , nitride , composite material , silicon , nitrogen , silicon oxynitride , metallurgy , chemistry , layer (electronics) , carbide , organic chemistry , biology , engineering , genetics
Biomorphic silicon nitride (Si 3 N 4 ) ceramics with fibrous morphology were fabricated by combining sol–gel infiltration with carbothermal reduction nitridation from wood precursor. Y 2 O 3 ‐incorporated silica sol was used as the infiltrated solution to promote the formation of fibrous Si 3 N 4 grain at 1600°C under high nitrogen pressure (0.6 MPa). The influence of sintering conditions (additive and temperature) on the phase composition and microstructure of sintering bodies was analyzed, and the reaction mechanism is discussed.