Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

The amorphization of 3C-SiC irradiated at moderately elevated temperatures as revealed by X-ray diffraction

Abstract : Mechanisms of radiation damage buildup in 3C-SiC remain poorly understood. Here, we use X-ray diffraction in combination with numerical simulations to study depth profiles of radiation-produced strain and lattice damage in 3C-SiC bombarded in the temperature range of 25-200 °C with 500 keV Ar ions. Results reveal increased defect recombination with increasing temperature, with a critical amorphization fluence increasing from 0.17 to 0.44 displacements per atom. The amorphization process is found to be correlated with the evolution of lattice strain. We find that, at fluences corresponding to the onset of amorphization, lattice strain is ~2% and is independent of temperature. With continuing bombardment above the onset of amorphization, the strain in the crystal bulk increases and reaches a saturation value that decreases from 7% to 5% with increasing temperature. Based on strain profiles, we compute depth profiles of the effective concentration of point defect clusters in the crystalline phase. Bombardment at higher temperatures results in lower maximum defect concentrations pointing to enhanced defect mobility. 1
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées

Littérature citée [45 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-02193096
Contributeur : Alexandre Boulle <>
Soumis le : mercredi 24 juillet 2019 - 11:35:17
Dernière modification le : samedi 18 juillet 2020 - 03:45:45

Fichier

Text_revised_final.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Alexandre Boulle, A. Debelle, J.B. Wallace, L.B. Bayu Aji, L Aji, et al.. The amorphization of 3C-SiC irradiated at moderately elevated temperatures as revealed by X-ray diffraction. Acta Materialia, Elsevier, 2017, 140, pp.250-257. ⟨10.1016/j.actamat.2017.08.030⟩. ⟨hal-02193096⟩

Partager

Métriques

Consultations de la notice

95

Téléchargements de fichiers

230