Impact of pre-existing crystal lattice defects on the accumulation of irradiation-induced damage in a C/C composite

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dc.contributor.authorWang, ZYen_AU
dc.contributor.authorMuránsky, Oen_AU
dc.contributor.authorZhu, HLen_AU
dc.contributor.authorWei, Ten_AU
dc.contributor.authorZhang, Zen_AU
dc.contributor.authorIonescu, Men_AU
dc.contributor.authorYang, Cen_AU
dc.contributor.authorDavis, Jen_AU
dc.contributor.authorHu, Gen_AU
dc.contributor.authorMonroe, Pen_AU
dc.contributor.authorWindes, Wen_AU
dc.date.accessioned2023-04-06T02:24:53Zen_AU
dc.date.available2023-04-06T02:24:53Zen_AU
dc.date.issued2022-06en_AU
dc.date.statistics2022-12-19en_AU
dc.descriptionG. Hu is supported by the Australian Institute of Nuclear Science and Engineering (AINSE). We also acknowledge the use of NCRIS-supported facility at the Centre for Accelerator Science of ANSTO.en_AU
dc.description.abstractA carbon-fibre reinforced carbon-matrix (C/C) composite was irradiated with 30 MeV C6+ ions to a peak damage of ∼25 dpa. Ion irradiation-induced microstructural changes were mainly studied using Raman spectroscopy. The irradiation-induced crystal lattice defect accumulation in the C/C composite was compared with a reference of PCIB graphite (nuclear-grade). It shows that a high concentration of pre-existing crystal lattice defects in the studied C/C composite have a significant impact on the unexpectedly high disordering of the crystal lattice observed along the entire ion range. In comparison, PCIB graphite with much less pre-existing crystal lattice defects behaves in a more predictable manner with the irradiation damage accumulated in a narrow high dpa region. We rationalised that a large number of pre-existing crystal lattice defects in the C/C composite lead to a stronger electron-phonon coupling and play an important role on the formation of stable crystal lattice defects due to electronic energy loss during ion irradiation. The present results have implications for the development of C/C composites for radiation-tolerant applications, in terms of the crystal lattice defect elimination in the as-manufactured microstructure. Additionally, this investigation identifies a fundamental knowledge gap in the electronic energy loss effect on the irradiation damage produced in carbon-based materials at intermediate ion energies. © 2022 Elsevier B.V.en_AU
dc.identifier.articlenumber153684en_AU
dc.identifier.citationWang, Z., Muránsky, O., Zhu, H., Wei, T., Zhang, Z., Ionescu, M., Yang, C., Davis, J., Hu, G., Monroe, P. & Windes, W. (2022). Impact of pre-existing crystal lattice defects on the accumulation of irradiation-induced damage in a C/C composite. Journal of Nuclear Materials, 564, 153684. doi:10.1016/j.jnucmat.2022.153684en_AU
dc.identifier.issn0022-3115en_AU
dc.identifier.journaltitleJournal of Nuclear Materialsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.jnucmat.2022.153684en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14816en_AU
dc.identifier.volume564en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCrystal latticesen_AU
dc.subjectComposite materialsen_AU
dc.subjectCarbonen_AU
dc.subjectMicrostructureen_AU
dc.subjectIrradiationen_AU
dc.subjectRaman spectroscopyen_AU
dc.subjectPhysical radiation effectsen_AU
dc.titleImpact of pre-existing crystal lattice defects on the accumulation of irradiation-induced damage in a C/C compositeen_AU
dc.typeJournal Articleen_AU
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