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Microstructure, properties and application of YAl_2 intermetallic compound as particle reinforcements

机译：YAl_2金属间化合物作为颗粒增强剂的组织，性能及应用

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摘要

An yttrium aluminum (YAl_2) intermetallic compound ingot was prepared in an induction furnace under vacuum. The microstructure of YAl_2 ingot was characterized by optical microscopy, scanning electron microscopy, and X-ray diffraction. The load bearing response of YAl_2 intermetallic was investigated and compared with SiC ceramic by indentation combined with optical microscopy and scanning electron microscopy. Additionally, the tensile properties of the Mg-Li matrix composites reinforced with ultrafine YAl_2 particles fabricated by planet ball milling were tested. The results show that the intermetallic compound ingot in this experiment is composed of a main face-centered-cubic structure YAl_2 phase, a small amount of YAl phase, and minor Y and Al-rich phases. YAl_2 intermetallic compound has excellent stability and shows better capability in crack resistance than SiC ceramic. The YAl_2 intermetallic compound has better deformation compatibility with the Mg-14Li-3Al matrix than SiC reinforcement with the matrix, which leads to the superior resistance to crack for YAl_(2p)/Mg-14Li-3Al composite compared to SiC_p/Mg-14Li-3Al composite.
机译：在感应炉中在真空下制备钇铝（YAl_2）金属间化合物锭。通过光学显微镜，扫描电子显微镜和X射线衍射对YAl_2铸锭的显微组织进行了表征。通过压痕结合光学显微镜和扫描电子显微镜研究了YAl_2金属间化合物的承载响应并与SiC陶瓷进行了比较。此外，测试了由行星球磨制备的超细YAl_2颗粒增强的Mg-Li基复合材料的拉伸性能。结果表明，该实验中的金属间化合物铸锭由主要的面心立方结构YAl_2相，少量的YAl相以及次要的富Y和Al相组成。 YAl_2金属间化合物具有优异的稳定性，并且比SiC陶瓷具有更好的抗裂性能。 YAl_2金属间化合物与Mg-14Li-3Al基体的变形相容性高于SiC增强基体，与SiC_p / Mg-14Li相比，YAl_（2p）/ Mg-14Li-3Al复合材料具有更好的抗裂性-3Al复合材料。

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  • 来源
    《Materials Science and Engineering》 |2014年第3期|139-145|共7页
  • 作者

    N. Li; Q.Q. Zhang; L.Y. Niu; G.Q. Wu; W. Sha;

  • 作者单位

    School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, PR China;

    School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, PR China;

    School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, PR China;

    School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, PR China;

    School of Planning, Architecture and Civil Engineering, Queen's University Belfast, Belfast BT7 1NN, UK;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Intermetallics; Magnesium alloys; Composites; Mechanical alloying; Electron microscopy; Fracture;

    机译：金属间化合物镁合金;复合材料;机械合金化;电子显微镜;断裂;

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