Local investigation of the emissive properties of LaB$_6$–ZrB$_2$ eutectics - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Article Dans Une Revue Journal of Materials Science Année : 2017

Local investigation of the emissive properties of LaB$_6$–ZrB$_2$ eutectics

Résumé

LaB$_6$–ZrB$_2$ composites obtained by directional solidification at eutectic composition have been investigated by low-energy electron microscopy (LEEM) and thermal emission electron microscopy (ThEEM). The transitions from the mirror electron microscopy mode to the LEEM mode for the hexa- and diborides indicate lower work functions of the two phases when embedded in the composite compared to the corresponding single phases. In the composite, the work function of the ZrB2 fibers is similar to that of the matrix and ThEEM images display a brighter contrast for the fibers. This is explained by the thermally activated diffusion of La on the fiber surface.
Fichier principal
Vignette du fichier
Douill.pdf (4.15 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

cea-01484778 , version 1 (07-06-2017)

Identifiants

Citer

Marie-Hélène Berger, T. C. Back, P. Soukiassian, D. Martinotti, L. Douillard, et al.. Local investigation of the emissive properties of LaB$_6$–ZrB$_2$ eutectics. Journal of Materials Science, 2017, 52, pp.5537-5543. ⟨10.1007/s10853-017-0816-0⟩. ⟨cea-01484778⟩
305 Consultations
448 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More