Fracture of pyrolytic graphite parts of nuclear facilities and measuring systems

• Published in: Atomic energy (New York, N.Y.) Vol. 114; no. 6; pp. 433 - 435
• Main Authors: Dorovskoy, V. M., Tutnov, I. A., Berestov, A. V., Rodionov, V. Ya
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.10.2013; Springer; Springer Nature B.V
• Subjects: Deformation; Gold; Grain boundaries; Graphite; Hadrons; Heavy Ions; Materials fatigue; Measurement techniques; Measuring instruments; Nuclear Chemistry; Nuclear Energy; Nuclear engineering; Nuclear facilities; Nuclear Physics; Nuclear reactors; Physics; Physics and Astronomy; Propagation; Scientific and Technical Communications; Studies; Russia; Nuclear Facility; Brittle Fracture; Pyrolytic Graphite; Creep Strength; Propagation Channel
• ISSN: 1063-4258; 1573-8205
• DOI: 10.1007/s10512-013-9735-6

Pyrolytic graphite is a layered material. For this reason, in order to obtain a layer of pyrolytic graphite suitable for study in an electron microscope it is first necessary to obtain a separate layer or layers which are transparent to electrons. For this, a special sticky film was glued onto a large piece of pyrolytic graphite. After the film was removed, a track consisting of several pyrolytic graphite layers remained on the surface of the graphite piece. A new sticky film was glued onto this track or tracks and removed; this was repeated with a third and fourth film. In this way, the technological procedure of separating pyrolytic graphite into layers was performed within the framework of the study. Repeating such procedures many times made it is possible to obtain layers of pyrolytic graphite on the sticky base of a film which are transparent to ~100 keV electrons.