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Preparation and mechanical properties of SiC-AlN ceramic alloy

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Abstract

Fine-grained SiC-AlN ceramic alloys were synthesized by the reaction of silicon nitride and aluminium nitride powders with additions of carbon and CaO. X-ray diffraction and STEM-EDX analysis showed that they are single phase solid solutions. The SiC-AlN alloys were sintered without additives to full density by hot isostatic pressing at 2173 K and 200 MPa for 2 h. The flexural strength, microhardness and fracture toughness were measured and it was found that SiC-AlN alloys have double the strength and slightly higher fracture toughnesses than conventional monolithic SiC.

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Authors and Affiliations

  1. Department of Materials Processing, Faculty of Engineering, Tohoku University, 980, Sendai, Japan

    Jing-Feng Li & Ryuzo Watanabe

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  1. Jing-Feng Li
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  2. Ryuzo Watanabe
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Li, JF., Watanabe, R. Preparation and mechanical properties of SiC-AlN ceramic alloy. J Mater Sci 26, 4813–4817 (1991). https://doi.org/10.1007/BF00612422

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  • DOI: https://doi.org/10.1007/BF00612422

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