| 金属玻璃Fe_(75)Mo_3Si_5B_(17)的微蠕变和内耗研究 |
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| 引用本文： | 何思明,钟德林,唐林昌.金属玻璃Fe_(75)Mo_3Si_5B_(17)的微蠕变和内耗研究[J].四川大学学报(自然科学版),1990(2). |
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| 作者姓名： | 何思明 钟德林 唐林昌 |
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| 作者单位： | 四川大学物理系
(何思明，钟德林)，四川大学物理系(唐林昌) |
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| 摘 要： | 研究了金属玻璃Fe_(75)Mo_3Si_5B_(17)由室温至500℃范围内的微蠕变和内耗.发现在结构弛豫过程中在较低温度的微蠕变回复能达到零,反映滞弹性性质;在较高温度则不能达到零,反映粘弹性性质.微蠕变的平均激活能为1.73eV.整个内耗曲线随频率增加向高温移动,具有弛豫型特征,激活能有一较宽分布.讨论了微蠕变和内耗的微观机制.
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| 关 键 词： | 微蠕变 内耗 滞弹性 粘弹性 应变变换 |
INVESTIGATION OF MICRO-CREEP AND INTERNAL FRICTION IN METALLIC GLASS Fe_(75)Mo_3Si_5B_(17) |
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| He Siming Zheng Delin Tang Linchang.INVESTIGATION OF MICRO-CREEP AND INTERNAL FRICTION IN METALLIC GLASS Fe_(75)Mo_3Si_5B_(17)[J].Journal of Sichuan University (Natural Science Edition),1990(2). |
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| Authors: | He Siming Zheng Delin Tang Linchang |
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| Institution: | Department of Physics |
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| Abstract: | The micro-creep and internal friction in metallic glasses Fe75Mo3Si5BI7 from room temperature up to 500 C were investigated with a torsionl micro-creep apparatus and a torsion pendulum. It was found that during structural relaxation process the micro-creep recovery at lower temperatures can reach zero,showing anelasticity while at higher temperatures can not reach zero, showing viscoelasticity. The average activation energy for the micro-creep is 1.73eV. The whole internal friction curve is shifted to higher temperature with the increase of frequency and exl ibits a characteristic of relaxation type. The activation energies have a wide distribution. A model of shear transformation in localized structural units (small clusters of atoms) is used to explain mechanism of the micro-creep and internal friction. |
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| Keywords: | micro creep internal friction anelasticity viscoelasticity shear transformation |
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