Hydrogen Gorsky effect in amorphous Cu{sub 50}Ti{sub 50}
- Univ. of Tsukuba, Ibaraki (Japan). Inst. of Materials Science
A previous investigation for the short range diffusion of hydrogen in amorphous Cu{sub 20}Ti{sub 50} suggests that there exist six representative atomic structures for the small clusters of the tetrahedra, where a short range jump of a hydrogen atom takes place with the activation energies E{sub 0}, E{sub 1}, ..., E{sub 5}(E{sub 0} > E{sub 1} > ... > E{sub 5}). In the present work, the long range connectivity of these hydrogen sites with various E{sub m}(m = 0 to 5) in amorphous Cu{sub 50}Ti{sub 50} is investigated in the hydrogen concentration range below 15 at.% by means of the hydrogen Gorsky effect (HGE) measurements. HGE is always observed to be composed of two constitutents, HGE-1 and 2. HGE-1 is surmised to be HGE through the whole thickness of a specimen, and HGE-2 to be HGE in some local-regions with the effective diffusion length of several {mu}m reflecting a distribution of internal stress in a specimen. The activation energy for HGE-1, E{sub G}{sup (1)}, is always found at around E{sub 1} or in between E{sub 0} and E{sub 2}, suggesting that there is no long range diffusion path spanning only the sites with lower E{sub 3} to E{sub 5}. E{sub G}{sup (2)} for HGE-2 is slightly higher than E{sub G}{sup (1)}. These results are discussed in the light of the site percolation.
- OSTI ID:
- 143156
- Journal Information:
- Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 2 Vol. 42; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
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