2D- and 3D Observation and Mechanism of Self-Healing in Glass-Boron Composites

Castanié, Sandra; Mear, François; Podor, Renaud; Suhonen, Heikki; Montagne, Lionel; Riemanis, I.

Type de document :

Article dans une revue scientifique

DOI :

10.1111/jace.14041

URL permanente :

http://hdl.handle.net/20.500.12210/12405

Titre :

2D- and 3D Observation and Mechanism of Self-Healing in Glass-Boron Composites

Auteur(s) :

Castanié, Sandra [Auteur]
Mear, François [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Podor, Renaud [Auteur]
Suhonen, Heikki [Auteur]
Montagne, Lionel [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Riemanis, I. [Auteur]

Titre de la revue :

Journal of the American Ceramic Society

Numéro :

Pagination :

849-855

Date de publication :

2015-12-21

Discipline(s) HAL :

Chimie/Chimie inorganique

Résumé en anglais : [en]

The self-healing of a crack in a glass–boron composite has been observed by X-ray nanotomography. It shows the occurrence of a healing effect within the bulk of the composite, despite of a limited oxygen access in the ...
Lire la suite >The self-healing of a crack in a glass–boron composite has been observed by X-ray nanotomography. It shows the occurrence of a healing effect within the bulk of the composite, despite of a limited oxygen access in the crack. This 3D tomographic observation offers new insights in the mechanism of healing, complementary to in situ high-temperature environmental scanning electron microscopy. In addition, nano-X-ray fluorescence imaging, electron microprobe and solid-state NMR gave evidence that the molten B2O3, produced by the oxidation of boron particles at 700°C, reacts with the glass matrix to form borosilicate compounds that also contribute to heal the crack. The high viscosity of B2O3 at 700°C leads to the formation of bridges between the walls of the crack, which limit oxygen diffusion. Thus, the B particle oxidation is not completed after a single healing cycle, meaning that several healing cycles can be obtained in a composite.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

RMN et matériaux inorganiques (RM2I)

Date de dépôt :

2019-09-24T14:35:10Z

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