Biomorphic Silicon Nitride Ceramics with Fibrous Morphology Prepared by Sol Infiltration and Reduction–Nitridation |
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| Authors: | Min Luo Ji-Qiang Gao Jian-Feng Yang Jun-Zhuo Fang Zheng Wang |
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| Affiliation: | State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;
School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China |
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| Abstract: | Biomorphic silicon nitride (Si3N4) ceramics with fibrous morphology were fabricated by combining sol–gel infiltration with carbothermal reduction nitridation from wood precursor. Y2O3-incorporated silica sol was used as the infiltrated solution to promote the formation of fibrous Si3N4 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. |
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