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首页> 外文期刊>Materials Research Bulletin >Matrix structure evolution and thermo-mechanical properties of carbon fiber-reinforced Al_2O_3-SiC-C castable composites
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Matrix structure evolution and thermo-mechanical properties of carbon fiber-reinforced Al_2O_3-SiC-C castable composites

机译：碳纤维增强的Al_2O_3-SiC-C浇铸复合材料的基体结构演变和热机械性能

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摘要

The spalling and corrosion during the thermal cycles are the main causes of the damages observed in Al_2O_3-SiC-C castable composites that are used in molten-iron system. Using the catalyst of nano Ni and ball pitch in the matrix, Al_2O_3-SiC-C castable composites were prepared with the anti-oxidant addition of silicon. The results indicate that the high temperature of the Al_2O_3-SiC-C castable composites can be increased by above 42%, and the thermal shock resistance can be enhanced by above 20% because the ball pitch is carbonized and releases C_xH_y vapor, which can be pyrolized to carbon atoms and subsequently deposited into carbon fibers under the catalyst action. The starting temperature of carbon fiber growth is approximately 900℃, and their diameter and aspect ratio can increase with the rising temperature. The in-situ generation of carbon fibers in Al_2O_3-SiC-C castable composites can significantly improve the fibers' thermo-mechanical properties.
机译：热循环中的剥落和腐蚀是在铁水体系中使用的Al_2O_3-SiC-C可浇铸复合材料中观察到损坏的主要原因。利用纳米Ni催化剂和基体中的球间距，通过添加硅的抗氧化剂制备了Al_2O_3-SiC-C可浇铸复合材料。结果表明，Al_2O_3-SiC-C铸造复合材料的高温可提高42％以上，并且由于球距碳化并释放出C_xH_y蒸气，可将耐热冲击性提高20％以上。热解成碳原子，然后在催化剂作用下沉积到碳纤维中。碳纤维生长的起始温度约为900℃，其直径和长宽比会随着温度的升高而增加。 Al_2O_3-SiC-C浇铸复合材料中碳纤维的原位生成可以显着改善纤维的热机械性能。

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  • 来源
    《Materials Research Bulletin》 |2015年第1期|201-206|共6页
  • 作者

    Xiangcheng Li; Yaxiong Li; Liufang Chen; Boquan Zhu;

  • 作者单位

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, 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
  • 中图分类
  • 关键词

    Composites; Electron microscopy; Mechanical properties; Microstructure;

    机译：复合材料;电子显微镜;机械性能微观结构;

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