Plastic flow in fcc metals induced by single-ion impacts

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Description

Irradiation of Au and Pb foils with Xe ions at temperatures between 30 and 450 K has been monitored using in-situ transmission electron microscopy. Single ion impacts give rise to surface craters on the irradiated surface with sizes as large as 12 nm. Approximately 2--5% of impinging ions produce craters on Au while only about 0.6% produce craters on Pb. Larger craters on Au frequently have expelled material associated with them. Temporal details of crater formation and annihilation has been recorded on video with a time resolution of 33 milliseconds. Craters annihilate in discrete steps due to subsequent ion impacts ... continued below

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16 p.

Creation Information

Birtcher, R. C. & Donnelly, S. E. September 1997.

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  • Birtcher, R. C. Argonne National Lab., IL (United States). Materials Science Div.
  • Donnelly, S. E. Univ. of Salford (United Kingdom). Joule Physics Lab.

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Description

Irradiation of Au and Pb foils with Xe ions at temperatures between 30 and 450 K has been monitored using in-situ transmission electron microscopy. Single ion impacts give rise to surface craters on the irradiated surface with sizes as large as 12 nm. Approximately 2--5% of impinging ions produce craters on Au while only about 0.6% produce craters on Pb. Larger craters on Au frequently have expelled material associated with them. Temporal details of crater formation and annihilation has been recorded on video with a time resolution of 33 milliseconds. Craters annihilate in discrete steps due to subsequent ion impacts or anneal in a continuous manner due to surface diffusion. Craters production (those persisting for one or more video frames) as a function of temperature indicates that the surface diffusion process responsible for thermal annealing of craters has an activation energy of 0.76 eV in Au. Crater creation results from plastic flow associated with near surface cascades. Crater annihilation in discrete steps results from plastic flow induced by subsequent ion impacts, including those that do not themselves produce a crater.

Physical Description

16 p.

Notes

INIS; OSTI as DE98050525

Source

  • 4. international union of Materials Research Societies international conference in Asia (IUMRS-ICA), Chiba (Japan), 16-18 Sep 1997

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  • Other: DE98050525
  • Report No.: ANL/MSD/CP--93801
  • Report No.: CONF-9709168--
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/634089 | External Link
  • Office of Scientific & Technical Information Report Number: 634089
  • Archival Resource Key: ark:/67531/metadc696664

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • September 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • Dec. 16, 2015, 1:06 p.m.

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Birtcher, R. C. & Donnelly, S. E. Plastic flow in fcc metals induced by single-ion impacts, report, September 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc696664/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.