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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >High-frequency elastic moduli and internal frictions of Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass during glass transition and crystallization
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High-frequency elastic moduli and internal frictions of Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass during glass transition and crystallization

机译：玻璃过渡期间Zr41.2Ti13.8Cu12.5Ni10Be22.5散装金属玻璃的高频弹性模态和内部摩擦

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摘要

Temperature dependent Young's modulus, shear modulus and the related internal frictions of Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit-1) bulk metallic glass (BMG) were measured by using the modified piezoelectric ultrasonic composite oscillator technique (M-PUCOT) at longitudinal and torsional resonance under several tens of kilohertz, respectively. An irreversible internal friction peak accompanied by a very small modulus relaxation (about 10%) are observed near the onset crystallization temperatures T-x in each resonance mode, and the peak values in these two modes are almost the same, indicating that the supercooled liquid region (SLR) is far from liquid state under high frequency vibration with micro strain (similar to 10(-7)) amplitude. What is more, the internal friction peak value decreases obviously after a preheating process to SLR (similar to 410 degrees C) and the final values of moduli are proportional to the crystallinity. All these interesting phenomena during the glass transition and crystallization can well be interpreted through a three-parameter anelastic solid phenomenological model.
机译：温度相关的杨氏模量、剪切模量和Zr41的相关内摩擦。2Ti13。8Cu12。5Ni10Be22。采用改进的压电超声复合振子技术（M-PUCOT），分别在几十赫兹的纵向和扭转共振下测量了5（Vit-1）块体金属玻璃（BMG）。在每个共振模式下，在起始结晶温度T-x附近观察到不可逆内耗峰，伴随着非常小的模量松弛（约10%），并且这两种模式下的峰值几乎相同，表明在微应变（类似于10（-7））振幅的高频振动下，过冷液相区（SLR）远离液态。此外，对SLR进行预热（类似于410°C）后，内耗峰值明显降低，模量的最终值与结晶度成正比。玻璃化转变和结晶过程中所有这些有趣的现象都可以通过三参数滞弹性固体唯象模型很好地解释。

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