Mechanism of internal friction in bulk Zr65Cu17.5Ni10Al7.5 metallic glass -: art. no. 184208

被引：18

作者：

Cai, B ^{[1
]}

Shang, LY

Cui, P

Eckert, J

机构：

[1] Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Hefei 230031, Peoples R China

[2] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.70.184208

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A mechanism of internal friction in metallic glasses is developed and adopted to analyze the results measured in the bulk Zr65Cu17.5Ni10Al7.5 metallic glass. A kink of internal friction is observed near the calorimetric glass transition. The nonlinear relation between the internal friction and frequencies is observed. The obtained activation energies for the relaxation in glassy state (1.7 eV) and supercooled liquid state (5.2 eV) suggest that the relaxation should be mainly controlled by the motion of a single atom in the glassy state, while by collective motion of atoms in the supercooled liquid state. The nonlinear relation between the internal friction and frequencies should be mainly caused by the distribution of microscopic relaxation parameters. The effects of annealing on relaxation parameters are also observed and discussed.

引用

页码：1 / 5

页数：5

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