通过测量高频内摩擦力研究金属玻璃的快速弛豫

arXiv - PHYS - Disordered Systems and Neural Networks Pub Date : 2024-04-27 DOI:arxiv-2404.17948

G. V. Afonin, J. C. Qiao, A. S. Makarov, N. P. Kobelev, V. A. Khonik

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引用次数: 0

摘要

我们对 14 种块状金属玻璃 (MG) 的内摩擦力 (IF) 进行了高频（0.4 至 1.7 MHz）测量。结果发现，其中 12 种金属玻璃在温度 T= 400-500 K 时显示出弛豫内摩擦力峰值，这些峰值受非晶态热处理的影响较弱。相应的弛豫时间约为 0.3 微秒。这种快速弛豫在文献中尚属首次报道。确定了 4 MG 的表观活化焓。

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Fast relaxation in metallic glasses studied by measurements of the internal friction at high frequencies

We performed high-frequency (0.4 to 1.7 MHz) measurements of the internal friction (IF) on 14 bulk metallic glasses (MGs). It is found that 12 of these MGs display relaxation IF peaks at temperatures T= 400-500 K, which are weakly affected by heat treatment within the amorphous state. The corresponding relaxation time is about 0.3 microseconds. This fast relaxation is reported for the first time in the literature. The apparent activation enthalpy for 4 MGs is determined.

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arXiv - PHYS - Disordered Systems and Neural Networks

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