Effect of accelerating voltage on beam damage of asbestos fibers in the transmission electron microscope (TEM)

Type de document

Études primaires

Année de publication

2017

Langue

Anglais

Titre de la revue

Micron

Première page

1

Dernière page

8

Résumé

Transmission electron microscopy (TEM) is a powerful and efficient tool for the analysis of asbestos fibers. Although this analysis technique is common and several standard methods exist for asbestos analysis, questions remain about the optimal conditions to be used. Because asbestos fibers are relatively sensitive to the electron beam, it is important to better understand the phenomena of damage in order to avoid them. This study specifically investigates the effect of the acceleration voltage on damage to four different types of asbestos fibers: chrysotile, amosite, crocidolite and anthophyllite. The results support the conclusion that, contrary to what is usually recommended, it is best to use an acceleration voltage of 200 kV rather than 100 kV in order to avoid damage. The findings shed light on possible damage mechanisms, the most predominant of which seems to be caused by an induced electric field.

Mots-clés

Amiante, Asbestos, CAS 1332214, Fibre minérale, Mineral fibre, Microscopie électronique par transmission, Transmission electron microscopy, Mesure de l'accélération, Acceleration measurement

Numéro de projet IRSST

2010-0067

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