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Plasticity improvement of ZrCu-based bulk metallic glass by ex situ dispersed Ta particles

机译:通过分散分散的Ta颗粒提高ZrCu基大块金属玻璃的可塑性

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摘要

The (Zr_(48)Cu_(36)Al_8Ag_8)_(99.25)Si_(0.75)-based bulk metallic glass composite (BMGC) rods ex situ dispersed with Ta particles (with a diameter of 2-4 mm) have been successfully fabricated by suction casting and characterized. These Ta-added BMGCs exhibit similar thermal properties in comparison with its base alloy counterpart, with relatively high glass forming ability (GFA). The results of compression test show that a superior mechanical performance with up to 22% compressive plastic strain, 1800 MPa yield strength and 1850 MPa fracture strength at room temperature can be obtained for the 2 mm diameter rod of the ZrCu-based BMGC with 10 vol.% Ta particles. These ex situ dispersed Ta particles (20 ± 8 μm) would arrange as semi-uniform confinement zones to restrict the shear band propagation. In addition, for a given Ta particle size, higher volume fraction particles would lead to more interfacial areas, shorter inter-particle spac-ings, smaller confinement zone sizes than the smaller volume fraction particles, and results in presenting larger compression plasticity.
机译:成功制备了异位分散有Ta颗粒(直径2-4 mm)的(Zr_(48)Cu_(36)Al_8Ag_8)_(99.25)Si_(0.75)基块状金属玻璃复合材料(BMGC)棒通过吸铸和表征。这些添加了Ta的BMGC与基础合金相比具有类似的热性能,具有较高的玻璃形成能力(GFA)。压缩测试结果表明,对于直径为10 mm的ZrCu基BMGC直径为2 mm的棒,在室温下可获得高达22%的压缩塑性应变,1800 MPa的屈服强度和1850 MPa的断裂强度的优异机械性能。 。%Ta颗粒。这些异位分散的Ta颗粒(20±8μm)将布置为半均匀的约束区域,以限制剪切带的传播。此外,对于给定的Ta粒径,与较小体积分数的颗粒相比,较高体积分数的颗粒会导致更多的界面区域,较短的颗粒间间距,较小的限制区大小,并导致呈现较大的压缩可塑性。

著录项

  • 来源
    《Materials Science and Engineering》 |2011年第28期|p.8244-8248|共5页
  • 作者单位

    Department of Mechanical Engineering, National Central University, Chung-Li 320, Taiwan;

    Department of Mechanical Engineering, National Central University, Chung-Li 320, Taiwan;

    Department of Materials Science and Engineering, 1-Shou University, Kaohsiung 840, Taiwan;

    Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan;

    Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan,Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan;

    Department of Materials and Optoelectronic Science, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    composites; metallic glasses; dispersion strengthening; mechanical properties at ambient; temperature; casting;

    机译:复合材料金属玻璃分散强化;室温下的机械性能;温度;铸件;

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