Hydrogen trapping by solute atoms in Nb-Mo(3 at.%) alloys as observed by the channeling method

To elucidate the mechanism of the enhancement of the terminal solubility for hydrogen (TSH) in Nb by alloying with undersized Mo atoms, the state of H was studied by the channeling method using a nuclear reaction exp 1 H( exp 11 B, alpha ) alpha alpha in Nb--Mo(3 at.%) alloys. At room temperature, H...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1989, Vol.39 (1), p.57-60
Main Authors: YAGI, E, NAKAMURA, S, KANO, F, KOBAYASHI, T, WATANABE, K, FUKAI, Y, MATSUMOTO, T
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solubility, segregation, and mixing
phase separation
Specific materials
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Summary:To elucidate the mechanism of the enhancement of the terminal solubility for hydrogen (TSH) in Nb by alloying with undersized Mo atoms, the state of H was studied by the channeling method using a nuclear reaction exp 1 H( exp 11 B, alpha ) alpha alpha in Nb--Mo(3 at.%) alloys. At room temperature, H atoms are located at sites displaced from tetrahedral (T) sites by approx 0.6 A towards the nearest-neighbor lattice points, while at 373K, they are at T sites. These results give direct evidence for trapping of H by Mo atoms and strongly support the trapping model for the enhancement of the TSH in the low-concentration region of Mo atoms. 18 ref.--AA
ISSN:0163-1829
1095-3795
DOI:10.1103/PhysRevB.39.57