Radiation defect dynamics in -, -, and -SiC studied by pulsed ion beams
Abstract
Radiation damage behavior of SiC depends on its lattice structure. Here, we use a pulsed-ion-beam method to study defect interaction dynamics in 6H-SiC and damage buildup in 4H- and 6H-SiC irradiated at 100 °C with 500 keV Ar ions. These results are compared with previously reported data for Ar-ion-irradiated 3C- and 4H-SiC. We find that, for these irradiation conditions, damage buildup in 3C- and 6H-SiC is statistically indistinguishable and is significantly more efficient than in 4H-SiC. Within a stimulated amorphization model, 4H-SiC is described by a reduced amorphization cross-section constant, while the point defect cluster production cross-section is the same (within experimental errors) for the three polytypes studied. Moreover, 4H-SiC exhibits slower defect relaxation dynamics than 3C- and 6H-SiC. These results clearly demonstrate the importance of the lattice structure in damage buildup and defect interaction dynamics in SiC.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Texas A & M Univ., College Station, TX (United States). Dept. of Nuclear Engineering
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1529178
- Report Number(s):
- LLNL-JRNL-737622
Journal ID: ISSN 0168-583X; 890147
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
- Additional Journal Information:
- Journal Volume: 435; Journal Issue: C; Journal ID: ISSN 0168-583X
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Bayu Aji, L. B., Wallace, J. B., and Kucheyev, S. O. Radiation defect dynamics in 3C -, 4H -, and 6H -SiC studied by pulsed ion beams. United States: N. p., 2018.
Web. doi:10.1016/j.nimb.2018.03.026.
Bayu Aji, L. B., Wallace, J. B., & Kucheyev, S. O. Radiation defect dynamics in 3C -, 4H -, and 6H -SiC studied by pulsed ion beams. United States. https://doi.org/10.1016/j.nimb.2018.03.026
Bayu Aji, L. B., Wallace, J. B., and Kucheyev, S. O. Wed .
"Radiation defect dynamics in 3C -, 4H -, and 6H -SiC studied by pulsed ion beams". United States. https://doi.org/10.1016/j.nimb.2018.03.026. https://www.osti.gov/servlets/purl/1529178.
@article{osti_1529178,
title = {Radiation defect dynamics in 3C -, 4H -, and 6H -SiC studied by pulsed ion beams},
author = {Bayu Aji, L. B. and Wallace, J. B. and Kucheyev, S. O.},
abstractNote = {Radiation damage behavior of SiC depends on its lattice structure. Here, we use a pulsed-ion-beam method to study defect interaction dynamics in 6H-SiC and damage buildup in 4H- and 6H-SiC irradiated at 100 °C with 500 keV Ar ions. These results are compared with previously reported data for Ar-ion-irradiated 3C- and 4H-SiC. We find that, for these irradiation conditions, damage buildup in 3C- and 6H-SiC is statistically indistinguishable and is significantly more efficient than in 4H-SiC. Within a stimulated amorphization model, 4H-SiC is described by a reduced amorphization cross-section constant, while the point defect cluster production cross-section is the same (within experimental errors) for the three polytypes studied. Moreover, 4H-SiC exhibits slower defect relaxation dynamics than 3C- and 6H-SiC. These results clearly demonstrate the importance of the lattice structure in damage buildup and defect interaction dynamics in SiC.},
doi = {10.1016/j.nimb.2018.03.026},
journal = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms},
number = C,
volume = 435,
place = {United States},
year = {Wed Mar 28 00:00:00 EDT 2018},
month = {Wed Mar 28 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
Radiation defect dynamics in SiC with pre-existing defects
journal, June 2019
- Bayu Aji, L. B.; Wallace, J. B.; Kucheyev, S. O.
- Journal of Applied Physics, Vol. 125, Issue 23