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Proceedings Paper

Formation of dislocations and hardening of LiF crystals irradiated with energetic Au, Bi, Pb, and S ions
Author(s): J. Maniks; Ilze Manika; K. Schwartz; M. Toulemonde; C. Trautmann
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Paper Abstract

The irradiation of LiF crystals with Au, Pb, Bi, and S ions in the range of 400 - 2200 MeV leads to a remarkable increase of the hardness. The effect appears for Bi and Pb ions at fluences above 109 ions/cm2 and for S ions above 1010 ions/cm2. The increase of hardness follows the energy loss and is related to the formation of defects along the ion path. Defect complexes, clusters and aggregates with nanoscale dimensions serve as strong obstacles for dislocations and cause dispersion strengthening. Structural investigations reveal the generation of long-range stress in the adjacent non-irradiated part of the crystal. Close to the implantation zone, the stress exceeds the yield strength, causing microplastic deformation and work hardening. Compared to light S ions, heavy ions (Au, Pb, Bi) cause more severe structural damage, larger hardening effects, and higher internal and long-range stress.

Paper Details

Date Published: 8 August 2003
PDF: 8 pages
Proc. SPIE 5122, Advanced Organic and Inorganic Optical Materials, (8 August 2003); doi: 10.1117/12.515640
Show Author Affiliations
J. Maniks, Univ. of Latvia (Latvia)
Ilze Manika, Univ. of Latvia (Latvia)
K. Schwartz, Gesellschaft fuer Schwerionenforschung (Germany)
M. Toulemonde, Gesellschaft fuer Schwerionenforschung (Germany)
C. Trautmann, Gesellschaft fuer Schwerionenforschung (Germany)

Published in SPIE Proceedings Vol. 5122:
Advanced Organic and Inorganic Optical Materials
Andris Krumins; Donats Millers; Inta Muzikante; Andris Sternbergs; Vismants Zauls, Editor(s)

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