1. Positron beam studies on the irradiation response of FeCrCoNi upon He ion implantation.
- Author
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Abhaya, S., Rajaraman, R., and David, C.
- Subjects
- *
POSITRON beams , *ION implantation , *DOPPLER broadening , *POSITRON annihilation , *ELECTRON distribution , *POSITRONS , *MOMENTUM distributions - Abstract
• Formation and growth of helium bubbles in FeCrCoNi studied using positron beam based Doppler broadening spectroscopy. • Positron lifetime and electron momentum distribution calculations in FeCrCoNi containing He m -V n complexes using MIKA code. • Positron beam results point out to higher bubble growth resistance in FeCrCoNi when compared to nickel. Positron beam-based Doppler broadening results on He ion-implanted FeCrCoNi show distinct changes in defect-sensitive S-parameter corresponding to the formation of helium-vacancy complexes, nucleation/ growth of helium bubbles, and finally the helium bubble rupture, with isochronal annealing. Data analyses of the positron beam-based ratio curves provide clear information on the kinetics of bubble growth and rupture. The difference data in S-parameter (ΔS), which corresponds to the bubble growth, displays a maximum at 1123 K, with annealing temperature. Comparing the ΔS value to that reported for nickel, it is concluded that FeCrCoNi has higher bubble growth resistance than nickel. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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