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dc.contributor.authorRao, G. R.
dc.contributor.authorWang, Z. L. (Zhong Lin)
dc.contributor.authorLee, E. H.
dc.date.accessioned2009-03-30T16:05:23Z
dc.date.available2009-03-30T16:05:23Z
dc.date.issued1993-04
dc.identifier.citationJournal of Materials Research, 8 (1993) 927-933en
dc.identifier.issn0884-2914
dc.identifier.urihttp://hdl.handle.net/1853/27455
dc.description©1993 Materials Research Society. The original publication is available at: http://www.mrs.org/en
dc.descriptionDOI: 10.1557/JMR.1993.0927
dc.description.abstractTefzel, a copolymer of tetrafluoroethylene and ethylene, was implanted simultaneously with 400 keV boron, 700 keV nitrogen, and 600 keV carbon to a dose of 3 X 10¹⁵ ions/cm² for each ion. The implanted layer was examined using transmission electron microscope and compared with the pristine Tefzel for microstructural changes. The microhardness of the implanted and pristine Tefzel was determined using a nanoindentation technique. TEM bright-field images of the implanted layer show a patch-type contrast with distinguishable bright and dark regions. Electron energy loss spectroscopy (EELS) was used to show that the bright regions had a higher carbon concentration, as compared with the dark regions. The carbon-rich regions had an average size of approximately 40 nm. The pristine material showed a fairly featureless contrast with occasional local patchy regions. These were determined to be due to local thickness variations. The triple implantation improved the hardness of pristine Tefzel by over 66 times. The structure of the carbon-rich regions appears to be clusters of sp² bonded C atoms with sp³ sites present and hydrogen preferentially bonded in the sp³ C configuration. It was speculated that the carbon-rich regions could be harder than the surrounding regions, but this could not be resolved due to the small size of the regions.en
dc.language.isoen_USen
dc.publisherGeorgia Institute of Technologyen
dc.subjectIon-implanted polymers
dc.subjectMicrostructure
dc.subjectElectron energy loss spectroscopy
dc.subjectSurface hardness
dc.subjectEthylene tetrafluoroethylene
dc.subjectTefzel
dc.titleMicrostructural effects on surface mechanical properties of ion-implanted polymersen
dc.typeArticleen
dc.contributor.corporatenameOak Ridge National Laboratory. Metals and Ceramics Division
dc.publisher.originalMaterials Research Society


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