Ion beam amorphization of muscovite mica

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1996.0229· OSTI ID:286331

Templier, C; Desage, F; Desoyer, J C ^[1]; Hishmeh, G ^[2]; Cartz, L ^[3]; Donnelly, S E; Vishnyakov, V ^[4]; Birtcher, R C ^[5]

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1. Laboratoire de Metallurgie Physique, 40 Av. Recteur Pineau 86022 Poitiers, Cedex (France)
2. Midwest Research Technologies Inc., 14540 Greenfield Avenue, Brookfield, Wisconsin 53005 (United States)
3. College of Engineering, Marquette University, Milwaukee, Wisconsin 53233 (United States)
4. Joule Laboratory, Science Research Institute, University of Salford M5 4WT (United Kingdom)
5. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

The microstructure of a muscovite mica exposed to a rare gas ion beam has been studied by transmission electron microscopy. The investigation of damage without implantation was carried out using argon and helium ions of sufficient energy to transverse the 100{endash}150 nm mica specimens. For 340 keV Ar{sup ++} irradiation, amorphization of mica occurred at a fluence as low as 3.5{times}10{sup 14} ions{center_dot}cm{sup {minus}2} which corresponds to 0.29 dpa. Muscovite can be amorphized using 80 keV helium ions, but this requires a much higher fluence and damage production of 4.6{times}10{sup 16} ions{center_dot}cm{sup {minus}2} and 0.60 dpa, respectively. Since helium irradiation results principally in ionization energy loss, it indicates that amorphization of muscovite results mainly from nuclear interactions. Complete amorphization of muscovite mica is found to take place for all ions at approximately the same amount of nuclear energy transfer to energetic primary knock-on atoms, assuming a recoil energy greater than 500 eV. This suggests that amorphization occurs directly in dense displacement cascades. A significant amount of helium, 100 ppm, can be implanted into muscovite mica without destroying the crystal structure. {copyright} {ital 1996 Materials Research Society.}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 286331
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 7 Vol. 11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHIZATION
AMORPHOUS STATE
ARGON IONS
HELIUM IONS
KEV RANGE
MICROSTRUCTURE
MUSCOVITE
PHYSICAL RADIATION EFFECTS