Actions for Depth-independent hardness improvements in ion irradiated polystyrene [electronic resource].

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Depth-independent hardness improvements in ion irradiated polystyrene [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
9 pages : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Polystyrene (PS) was irradiated with 2 MeV He⁺ ions to a fluence of 3.3 × 10⁹ ions/m². A cross-section of the irradiated layer was subjected to hardness measurements across the section using a nanoindentation technique. Results showed that hardness increased as a function of irradiation depth and showed a maximum value of 12 GPa at a depth of approximately 6.5 μm, for a total ion penetration range of 9 μm, as compared to a hardness of 0.45 GPa for unirradiated PS. The hardness variation with depth followed the trend for Linear Energy Transfer (LET) for ionization from the energetic ions to substrate atoms. This investigation showed for the first time how hardness varies as a function of depth for ion-irradiated polymers; this variation approximately follows the ionization LET profile, suggesting that cross-linking in the polymers could be proportional to ionization.
Report Numbers
E 1.99:conf-941144--93
conf-941144--93
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
12/31/1994.
"conf-941144--93"
"DE95008682"
Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994.
Lee, E.H.; Rao, G.R.; Riester, L.
Funding Information
AC05-84OR21400
View MARC record | catkey: 14452272