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首页> 外文期刊>Journal of Materials Research >Fabrication of highly porous TiAl_3 intermetallics using titanium hydride as a reactant in the thermal explosion reaction
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Fabrication of highly porous TiAl_3 intermetallics using titanium hydride as a reactant in the thermal explosion reaction

机译：在热爆炸反应中使用氢化钛作为反应物制备高度多孔的TiAl_3金属间化合物

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摘要

Porous TiAl3 intermetallics were synthesized by the thermal explosion (TE) reaction from TiH2-75 at.% Al elemental powders combining with carbamide as the space holder. The results showed that the space holder particles were removed completely by dissolving in water before sintering and the violent exothermic reaction occurred from the temperature of 672-1193 degrees C within a few seconds. After TE, TiAl3 was the dominant phase in sintered products and the open porosity of 60.8% was obtained without space holder, while the porosity considerably increased to 81.4% with the addition of 60 vol% carbamide particles. The pore-forming mechanism can be concluded as follows: the sphere large pores replicated from carbamide particles and the small pores generated by the TE reaction. Moreover, porous TiAl3 intermetallics possess the excellent oxidation resistance at 650 degrees C in air, which enabled them good candidate materials for improving the service life and the accuracy of filtration under special conditions.
机译：通过热爆炸（TE）反应，由TiH2-75 at。％Al元素粉末与尿素结合作为空间载体，合成了多孔TiAl3金属间化合物。结果显示，在烧结前通过溶解在水中完全除去了空间保持器颗粒，并且在几秒钟内从672-1193℃的温度发生剧烈的放热反应。 TE后，TiAl3是烧结产品中的主要相，在没有空间保持器的情况下，开放孔隙率为60.8％，而通过添加60％（体积）的尿素颗粒，孔隙率显着增加至81.4％。成孔机理可以归纳为：从尿素颗粒中复制出来的大孔和TE反应产生的小孔。此外，多孔TiAl3金属间化合物在空气中于650摄氏度下具有出色的抗氧化性，使其成为在特定条件下提高使用寿命和过滤精度的良好候选材料。

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  • 来源
    《Journal of Materials Research》 |2018年第18期|2680-2688|共9页
  • 作者

    Jiao Xinyang; Feng Peizhong; Liu Yanan; Cai Xiaoping; Wang Jianzhong; Czujko Tomasz;

  • 作者单位

    China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Jiangsu, Peoples R China;

    Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Shaanxi, Peoples R China;

    Mil Univ Technol, Fac Adv Technol & Chem, Dept Adv Mat & Technol, PL-00908 Warsaw, Poland;

  • 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

    combustion synthesis; porosity; microstructure;

    机译：燃烧合成;孔隙度;微观结构;

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