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首页> 外文期刊>CERAMICS INTERNATIONAL >Synthesis of a novel single-source precursor for HfC ceramics and its feasibility for the preparation of Hf-based ceramic fibres
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Synthesis of a novel single-source precursor for HfC ceramics and its feasibility for the preparation of Hf-based ceramic fibres

机译：HFC陶瓷新型单源前体的合成及其制备HF型陶瓷纤维的可行性

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摘要

The growing popularity of ultra-high-temperature ceramics inspired us to prepare Hf-based ceramic fibres by sequential melt hand-drawing, ultraviolet (UV) crosslinking, and pyrolysis of a novel polymeric precursor synthesised by co-polymerisation of HfCl4, ethylenediamine, and allylamine. The above precursor featured a backbone comprising Hf-N and CH = CH groups and exhibited good melt spin ability due to having a relatively linear-chain structure, an optimal molecular weight (M-n= 2569 g/mol), and a suitable softening point (135-155 degrees C), being easily melt-drawn into green fibres (diameter = 25 pm) and exhibiting a high ceramic yield of 46.38 wt% at 1500 degrees C. UV curing of green fibres at room temperature and their subsequent pyrolysis in an inert atmosphere at 1200 and 1600 degrees C afforded Hf-based ceramic fibres (diameter = 13 pm), indicating the great potential of the above precursor and the prepared ceramic fibres for ceramic matrix composites used in high temperature applications.
机译：超高温陶瓷的普及感受到通过顺序熔体手绘，紫外（UV）交联和通过通过HFCL4，乙二胺和乙二胺和allylamine。上述前体采用包含HF-N和CH = CH的骨架，并且由于具有相对直链结构，最佳分子量（Mn = 2569g / mol）和合适的软化点而表现出良好的熔融旋转能力，以及合适的软化点（ 135-155℃），易于熔化到绿色纤维（直径=25μm）中，并在室温下的绿色纤维的1500℃下的46.38wt％的高陶瓷产率为46.38wt％及其随后的热解1200和1600摄氏度的惰性气氛得到了基于HF的陶瓷纤维（直径=13μm），表明上述前体和用于高温应用中使用的陶瓷基质复合材料的制备陶瓷纤维的巨大电位。

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  • 来源
    《CERAMICS INTERNATIONAL》 |2018年第6期|共5页
  • 作者

    Cheng Jun; Wang Xiaozhou; Wang Jun; Wang Hao;

  • 作者单位

    Natl Univ Def Technol Sci &

    Technol Adv Ceram Fibres &

    Composites Lab Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Sci &

    Technol Adv Ceram Fibres &

    Composites Lab Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Sci &

    Technol Adv Ceram Fibres &

    Composites Lab Changsha 410073 Hunan Peoples R China;

    Natl Univ Def Technol Sci &

    Technol Adv Ceram Fibres &

    Composites Lab Changsha 410073 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 陶瓷工业;硅酸盐工业;
  • 关键词

    Ultra-high-temperature ceramics; Precursor; HfC; Fibres;

    机译：超高温陶瓷;前体;HFC;纤维;

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