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- Title
Positron Annihilation Spectroscopy Characterization of Formation of Helium/Hydrogen-Vacancy Nano-Clusters in FeCr Alloy.
- Authors
TE ZHU; BAOYI WANG; XIANGYU LIAN; SHUOXUE JIN; RUNSHENG YU; XINGZHONG CAO; QIU XU
- Abstract
In the present work, Fe9Cr model alloy was implanted with 100 keV He and 60 keV H ions at room temperature. Positron annihilation Doppler broadening spectroscopy was employed to detect (H, He)-V complexes with open volume in the irradiated specimens. The results show that the positron is sensitive to the relative position of the gas atoms decorating the open volume; i.e., to the configuration of the (H, He)-V complexes. The formation of H-vacancy clusters after H implantation and a large number of vacancies can be retained after H-V decomposes at room temperature. For the pre-implanted He situation (He + H), He-vacancy clusters are formed in advance and the post-implanted H introduces a large number of vacancies and decomposable H-vacancy clusters. The He-vacancy clusters forming in advance may recombine with vacancies and H atoms to form stable He-vacancy clusters and a small amount of He-H-V complex.
- Subjects
POSITRON annihilation; DOPPLER broadening; SPECTROMETRY; HELIUM; ALLOYS; ION temperature; POSITRONS
- Publication
Acta Physica Polonica: A, 2020, Vol 137, Issue 2, p235
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.137.235