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Formation of tough interlocking microstructure in ZrB_2-SiC-based ultrahigh-temperatuve ceramics by pvessuveless sintering

机译:无熔烧结在ZrB_2-SiC基超高温陶瓷中形成强韧的互锁显微组织

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摘要

A self-reinforced ultrahigh-temperature ceramic (UHTC) with elongated ZrB_2 grains has been successfully densified by pressureless sintering using commercially available ZrB_2, SiC, and WC powders as raw materials. Benefiting from the unique interlocking microstructure, this material had improved strength (518 ± 10 MPa) and higher fracture toughness (6.5 ± 0.2 MPa m~(1/2)) compared to ZrB_2-SiC ceramics prepared by pressureless sintering. This work provides a new route for tailoring the microstructure and mechanical properties of UHTCs.
机译:具有拉长的ZrB_2晶粒的自增强超高温陶瓷(UHTC)已通过使用市售ZrB_2,SiC和WC粉作为原料的无压烧结成功地进行了致密化。与通过无压烧结制备的ZrB_2-SiC陶瓷相比,得益于独特的互锁微结构,该材料具有更高的强度(518±10 MPa)和更高的断裂韧性(6.5±0.2 MPa m〜(1/2))。这项工作为定制UHTC的微观结构和力学性能提供了一条新途径。

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  • 来源
    《Journal of Materials Research》 |2009年第7期|2428-2434|共7页
  • 作者单位

    State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Shanghai 200050, China Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of High Performance Ceramics and Superfine Microstructures. Shanghai Institute of Ceramics, Shanghai 200050, China;

    State Key Laboratory of High Performance Ceramics and Superfine Microstructures. Shanghai Institute of Ceramics, Shanghai 200050, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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