Facile synthesis of SiBCN powders by a carbonitriding route |
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| Affiliation: | 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, China;2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, China |
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| Abstract: | SiBCN ceramic powders were facilely synthesized from the compacts of silicon, B4C and cornstarch by a carbonitriding route. Effects of silicon content in raw materials on phase composition, chemical bond, microstructure and oxidation resistance of as-received products after heated at 1550 °C were investigated. The featured chemical bonds such as C N and BCN in as-received products were detected by X-ray photoelectron spectroscopy (XPS). The microstructure of BN(C) distributed around nano-sized α/β -SiC/SiCN grains was revealed by transmission electron microscopy (TEM). The synthesized products with the Si/B/C ratio of 1:1:1 presented better oxidation resistance than SiC because of the strengthened chemical bonds and BN(C) formation. |
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| Keywords: | SiBCN Synthesis Carbonitriding Microstructure Oxidation resistance |
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