Time and amplitude dependences of the damping decrement and shear modulus upon irreversible structural relaxation in a Zr-Cu-Ni-Al-Ti bulk metallic glass
Time and amplitude dependences of the damping decrement and shear modulus upon irreversible structural relaxation in a Zr-Cu-Ni-Al-Ti bulk metallic glass
复制标题
Zr-Cu-Ni-Al-Ti 大块金属玻璃中不可逆结构松弛的阻尼减量和剪切模量的时间和振幅依赖性
DOI：
10.1134/1.1884697
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发表时间：
2005
影响因子：
0.6
通讯作者：
V. Khonik
中科院分区：
文献类型：
--
作者：
N. Kobelev;E. Kolyvanov;V. Khonik
利用倒扭摆研究了Zr52.5Ti5Cu17.9Ni14.6Al10块体金属玻璃在室温至10650 K范围内阻尼衰减和剪切模量不可逆弛豫的时间依赖性。从所获得的结果的不可逆结构弛豫的激活能谱进行评估。的阻尼衰减和剪切模量的振幅依赖性的分析允许的结论是，负责的振幅依赖性的弛豫中心不同于那些与不可逆的结构弛豫在温度低于和在玻璃化转变点附近。
The time dependences of the irreversible relaxation of the damping decrement and the shear modulus of a Zr52.5Ti5Cu17.9Ni14.6Al10bulk metallic glass are investigated using an inverse torsion pendulum in the range from room temperature to ∼650 K. The spectrum of activation energies of irreversible structural relaxation is evaluated from the results obtained. Analysis of the amplitude dependences of the damping decrement and the shear modulus allows the conclusion that the relaxation centers responsible for the amplitude dependence differ from those associated with the irreversible structural relaxation at temperatures below and in the vicinity of the glass transition point.