Electron radiation damages to dicalcium (Ca2SiO4) and tricalcium (Ca3SiO5) orthosilicates - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Année : 2016

Electron radiation damages to dicalcium (Ca2SiO4) and tricalcium (Ca3SiO5) orthosilicates

Résumé

Electron radiation damages to dicalcium silicate (Ca2SiO4) and tricalcium silicate (Ca3SiO5) are reported for the first time in this paper. With increasing flux, between 2.7 x 1017 and 2.2 x1022 e- cm-2 s-1, decomposition into nanodomains of crystalline CaO plus an amorphous silica rich phase is first observed for both silicates, then amorphization at higher flux always for both silicates, and finally hole drilling but only for Ca3SiO5. These structural modifications are accompanied by a net reduction of Ca content under the electron beam depending on the silicate species. These radiation effects occur for values of flux and dose larger than in previously studied orthosilicates (like olivines), and much larger than in all tectosilicates.
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Dates et versions

hal-01314877 , version 1 (12-05-2016)

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  • HAL Id : hal-01314877 , version 1

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Marie-Noëlle de Noirfontaine, Frederic Dunstetter, Mireille Courtial, Marcel Signes-Frehel, Guillaume Wang, et al.. Electron radiation damages to dicalcium (Ca2SiO4) and tricalcium (Ca3SiO5) orthosilicates. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2016, Basic Research on Ionic-Covalent Materials, 374, pp.111-115. ⟨hal-01314877⟩
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