Effect of temperature on beam damage of asbestos fibers in the transmission electron microscope (TEM) at 100 kV

Type de document

Études primaires

Année de publication

2017

Langue

Anglais

Titre de la revue

Micron

Première page

26

Dernière page

36

Résumé

Damage to asbestos fibers by the transmission electron microscope (TEM) electron beam is a known limitation of this powerful method of analysis. Although it is often considered only in terms of loss of crystallinity, recent studies have shown that the damage may also change the elemental composition of fibers, thus causing significant identification errors. In this study, the main objective was to assess whether temperature is a factor influencing damage to asbestos fibers and, if so, how it can be used to minimize damage. It was found that lowering the temperature to 123 K can inhibit, for a given time, the manifestation of the damage. The significant decrease of atom diffusion at low temperature momentarily prevents mass loss, greatly reducing the possibility of misidentification of anthophyllite asbestos fibers. The results obtained in this study strongly suggest that the predominant mechanism damage is probably related to the induced-electric-field model relegating radiolysis to the status of a subsidiary damage mechanism.

Mots-clés

Amiante, Asbestos, CAS 1332214, Fibre minérale, Mineral fibre, Microscopie électronique par transmission, Transmission electron microscopy, Mesure de la température, Temperature measurement

Numéro de projet IRSST

2010-0067

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