Effects of passing electric current on the elastic property of amorphous Cu{sub 50}Zr{sub 50} and Cu{sub 50}Ti{sub 50}
- Univ. of Tsukuba, Ibaraki (Japan). Inst. of Materials Science
For both amorphous Cu{sub 50}Zr{sub 50} and Cu{sub 50}Ti{sub 50}, the dynamic Young`s modulus M was found to increase under passing electric d.c.-current (PEC) with the current density i{sub d} below 5 {times} 10{sup 3} A/cm{sup 2}, suggesting that PEC induces internal stress. The i{sub d} dependence of M observed at low strain amplitude {epsilon}{sub t} was found to be identical to the {epsilon}{sub t} dependence of M without PEC after scaling between i{sub d} and {epsilon}{sub t}, giving Z* in the order of 10{sup 5}, where Z* is the apparent charge number measuring the electromigration force (EM-force) under PEC. The authors surmise that such a large Z* reflects the concentration of EM-force through the collective motion of many atoms, Z* = z*{xi}, for {xi} atoms with the charge number z* per atom. Application of this view to the observed effect of annealing on Z* gives {xi} as several hundreds in the as-quenched state. Based on the present results, the effects of PEC on the structural relaxation and crystallization processes reported are also discussed.
- OSTI ID:
- 264100
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 7 Vol. 44; ISSN XZ504Y; ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- English
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