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Shear modulus and compliance in the range of the dynamic glass transition for metallic glasses

机译:金属玻璃在动态玻璃化转变范围内的剪切模量和顺应性

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The dynamic shear modulus and compliance of the dynamic glass transition were investigated in two metallic glasses (Pd_(40)Ni_(40)P_(20) and Zr_(65)Al_(7.5)Cu_(17.5)Ni_(10). Isothermal measurements over four frequency decades enable the determination of shape parameters for the proper glass transition. The real part of the dynamic shear compliance shows a step height of approximately a factor of 2.6 for Pd_(40)Ni_(40)P_(20), comparable to low molecular weight glass formers or the segmental mode as part of the glass transition in high molecular weight polymers. The frequency dependence of the imaginary part of the shear compliance at the high frequency side of the peak shows an exponent near the Andrade value of 1/3.
机译:研究了两种金属玻璃(Pd_(40)Ni_(40)P_(20)和Zr_(65)Al_(7.5)Cu_(17.5)Ni_(10)的动态剪切模量和动态玻璃化转变的顺应性。在超过四个频率的十年中,能够确定合适的玻璃化转变的形状参数,动态剪切柔量的实部显示Pd_(40)Ni_(40)P_(20)的阶跃高度约为2.6倍低分子量玻璃形成剂或在高分子量聚合物中作为玻璃化转变一部分的分段模式。峰高频侧的剪切顺应性虚部的频率依赖性显示出安德拉德值接近1 / 3。

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