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首页> 外文期刊>Materials Science and Engineering >Dynamic viscoelasticity of Zr-Al-Ni-Cu metallic glass in the glass transition region
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Dynamic viscoelasticity of Zr-Al-Ni-Cu metallic glass in the glass transition region

机译：Zr-Al-Ni-Cu金属玻璃在玻璃化转变区的动态粘弹性

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摘要

Viscoelastic behaviour of a metallic glass Zr_(55)Al_(10)Ni_5Cu_(30) has been studied by measuring the dynamic shear modulus G under forced vibration at low frequencies below 1 Hz. In measurements with increasing temperature, the shear modulus falls markedly at temperatures around the glass transition but at different rates under different vibration frequencies. The dynamic viscosity η has been evaluated using the relation η = G/(iω), where ω is the angular frequency. The curves of |η| vs temperature of different frequencies converge to a single curve in the glass transition region, and the converged curve is in fair agreement with the data reported in the literature. The dynamic glass transition point, defined as the vibration frequency and temperature at which the curves of the storage modulus G_1 and the loss modulus G_2 cross each other, obeys the Arrhenius law. The pre-exponential factor and the activation energy of the transition frequency are unusually large, suggesting that collective movements of atoms control the transition.
机译：通过在低于1 Hz的低频下强迫振动下测量动态剪切模量G，研究了金属玻璃Zr_（55）Al_（10）Ni_5Cu_（30）的粘弹性行为。在随温度升高的测量中，剪切模量在玻璃化转变附近的温度下明显下降，但在不同的振动频率下以不同的速率下降。使用关系式η= G /（iω）评估了动态粘度η，其中ω是角频率。 |η|的曲线在玻璃化转变区域中，不同频率的温度曲线在一条曲线上收敛，并且该收敛曲线与文献中报道的数据完全吻合。动态玻璃化转变点定义为振动频率和温度，在该频率下，储能模量G_1和损耗模量G_2的曲线相互交叉，遵守阿伦尼乌斯定律。前指数因子和跃迁频率的活化能异常大，表明原子的集体运动控制跃迁。

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  • 来源
    《Materials Science and Engineering》 |2009年第2009期|232-235|共4页
  • 作者

    Y.Ueno; M.Hojo; H. Numakura; T.Ichitsubo; J.Saida;

  • 作者单位

    Department of Materials Science, Osaka Prefecture University, Naka-ku, Sakai 599-8531, Japan;

    Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan;

    Department of Materials Science, Osaka Prefecture University, Naka-ku, Sakai 599-8531, Japan;

    Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan;

    Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    amorphous solids; metallic glasses; glass transition; viscoelasticity; viscosity; rheology;

    机译：无定形固体;金属玻璃玻璃化转变;粘弹性粘度流变学;

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