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Thermal Shock Resistance Behavior of Alumina Ceramics Incorporated with Boron Nitride Nanotubes

Authors

  • Wei-Li Wang,

    1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, China
    2. Engineering Ceramics Key Laboratory of Shandong Province, Shandong University, Jinan, China
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  • Jian-Qiang Bi,

    Corresponding author
    1. Engineering Ceramics Key Laboratory of Shandong Province, Shandong University, Jinan, China
    • Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, China
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  • Kang-Ning Sun,

    1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, China
    2. Engineering Ceramics Key Laboratory of Shandong Province, Shandong University, Jinan, China
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  • Ming Du,

    1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, China
    2. Engineering Ceramics Key Laboratory of Shandong Province, Shandong University, Jinan, China
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  • Na-Na Long,

    1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, China
    2. Engineering Ceramics Key Laboratory of Shandong Province, Shandong University, Jinan, China
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  • Yu-Jun Bai

    Corresponding author
    • Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, China
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  • This work was supported by the National Natural Science Foundation of China (No. 50872072, 51042005, and 50972076), Independent Innovation Foundation of Shandong University (2009TS001), and Graduate Independent Innovation Foundation of Shandong University (31370070613213).

Author to whom correspondence should be addressed. e-mails: bjq1969@163.com (Jian-Qiang Bi) and byj97@126.com (Yu-Jun Bai)

Abstract

Alumina-matrix composite containing 2.0 wt% boron nitride nanotubes and monolithic alumina were fabricated by hot pressing, and their thermal and mechanical properties were investigated. Thermal shock resistance was evaluated by water quenching and subsequently by measuring the residual flexural strength by three-point bending test. Though the residual flexural strength of the composite is higher than that of the monolith at temperature differences lower than 280°C, the thermal shock of the composite is more sensitive to temperature change, exhibiting no significant improvement in thermal shock resistance. The variation in thermal shock resistance for the composite is resulted from the introduction of BNNTs.

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