Collapse of defect cascades to dislocation loops in Cu/sub 3/Au

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TEM and ordered Cu/sub 3/Au were employed to measure the probability of dislocation loop formation as functions of irradiating ion mass (Ar/sup +/, Cu/sup +/ and Kr/sup +/), energy (50 and 100 keV), and irradiation temperature (30 and 300/sup 0/K). Disordered zones were produced at every defect cascade site and imaged in dark-field superlattice reflections. Dislocation loops were imaged in fundamental reflections in the same sample areas to produce an accurate measurement of the probability of the collapse of each cascade to a dislocation loop, within a large set (approx.200) of defect cascades for each irradiation condition. The size distributions ... continued below

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Pages: 21

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Black, T.J.; Jenkins, M.L.; English, C.A. & Kirk, M.A. February 1, 1986.

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TEM and ordered Cu/sub 3/Au were employed to measure the probability of dislocation loop formation as functions of irradiating ion mass (Ar/sup +/, Cu/sup +/ and Kr/sup +/), energy (50 and 100 keV), and irradiation temperature (30 and 300/sup 0/K). Disordered zones were produced at every defect cascade site and imaged in dark-field superlattice reflections. Dislocation loops were imaged in fundamental reflections in the same sample areas to produce an accurate measurement of the probability of the collapse of each cascade to a dislocation loop, within a large set (approx.200) of defect cascades for each irradiation condition. The size distributions of dislocation loops and disordered zones were also measured. Defect cascades collapse to dislocation loops with significant probability (approx.0.5) even at 30/sup 0/K. Other observations include an increasing collapse probability with increasing cascade energy density (increasing ion mass) and with increasing sample irradiation temperature. However, no additional collapse was observed upon annealing from 30 to 300/sup 0/K, and no increase in collapse probability was observed upon increasing the bombarding ion energy from 50 to 100 keV. Disordered zone sizes also increased with increasing ion mass and with increasing sample irradiation temperature (30 to 300/sup 0/K).

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Pages: 21

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NTIS, PC A02/MF A01.

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  • 13. international symposium on the effects of radiation on materials, Seattle, WA, USA, 23 Jun 1986

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  • Other: DE86014529
  • Report No.: CONF-860605-22
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5549454
  • Archival Resource Key: ark:/67531/metadc1093944

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  • February 1, 1986

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  • Feb. 10, 2018, 10:06 p.m.

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  • Feb. 21, 2018, 1:34 p.m.

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Black, T.J.; Jenkins, M.L.; English, C.A. & Kirk, M.A. Collapse of defect cascades to dislocation loops in Cu/sub 3/Au, article, February 1, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1093944/: accessed December 9, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.