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Investigation of the interaction between hydrogen and irradiation defects in titanium by using positron annihilation spectroscopy.
- Source :
-
International Journal of Hydrogen Energy . Apr2021, Vol. 46 Issue 24, p13162-13170. 9p. - Publication Year :
- 2021
-
Abstract
- The formation of mono-vacancy, vacancy clusters and hydrogen-vacancy complexes with 30 keV H ion-irradiated pure titanium at different doses and temperatures was measured using by Positron annihilation spectroscopy (PAS). Results show a large number of H m V n clusters and vacancy-like defects in the samples irradiated at for room temperature, and that the formation of H m V n (m > n) at the sample irradiated at a high dose inhibits the increase of the S parameter. At increased irradiation temperature, the shrinkage of vacancy clusters and the effective open volume of defects decrease the S parameters. The high-temperature irradiation results in decreased vacancy-type defect concentration, and some hydrogen atoms diffuse from the cascade region to the track region, forming a large number of hydrogen-vacancy complexes in the track region. The coincidence Doppler broadening spectroscopy, an element analysis method, used to detect hydrogen in the ion-irradiated pure titanium sample, and results show hydrogen-related peaks in the high-momentum region, which may be due to the information of positron annihilation in the covalent bond formed by the H and the Ti elements. The increased radiation dose and temperature contribute to the formation of the hydrogen vacancy-complex, and the positron annihilation in high-momentum regions easily obtain hydrogen-related information. • The increased radiation dose and temperature contribute to the formation of the hydrogen vacancy-complex (H m V n). • The formation of H m V n (m > n) at the sample irradiated at a high dose inhibits the increase of the S parameter. • Hydrogen-vacancy complexes (H m V n) formed as hydrogen atoms deposited in the material. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 46
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 149437012
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2021.01.128