Formation and Erosion of WC Under W{sup +} Irradiation of Graphite

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The bombardment of C with 100 keV and 1 MeV W at normal incidence is studied as a function of the incident W fluence experimentally and by computer simulation with the program TRIDYN. Calculated oscillations in the amount of retained W and in the target weight change are confirmed experimentally for 100 keV at room temperature. XPS investigations show W{sub 2}C formation during ion implantation already at room temperature. RBS depth profiles for 1 MeV bombardment show W mobility and surface segregation even at liquid nitrogen (LN{sub 2}) temperatures. At elevated temperatures W clusters to form nano-particles at the surface ... continued below

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6 pages

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Roth, J. January 16, 2001.

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The bombardment of C with 100 keV and 1 MeV W at normal incidence is studied as a function of the incident W fluence experimentally and by computer simulation with the program TRIDYN. Calculated oscillations in the amount of retained W and in the target weight change are confirmed experimentally for 100 keV at room temperature. XPS investigations show W{sub 2}C formation during ion implantation already at room temperature. RBS depth profiles for 1 MeV bombardment show W mobility and surface segregation even at liquid nitrogen (LN{sub 2}) temperatures. At elevated temperatures W clusters to form nano-particles at the surface and the oscillations in the retained amount of W disappear.

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6 pages

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  • Materials Research Society Fall Meeting, No conference location provided, No conference dates provided

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  • Report No.: P01-109556
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 774929
  • Archival Resource Key: ark:/67531/metadc715916

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  • January 16, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 30, 2016, 5:18 p.m.

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Roth, J. Formation and Erosion of WC Under W{sup +} Irradiation of Graphite, article, January 16, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc715916/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.