The Formation of High-Coercivity, Oriented, Nanophase Cobalt Precipitates in Al

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Ion-implantation and thermal-processing methods have been used to form nanophase magnetic precipitates of metallic cobalt that are embedded in the near-surface region of single crystals of Al{sub 2}O{sub 3}. The Co precipitates are isolated, single-crystal particles that are crystallographically oriented with respect to the host Al{sub 2}O{sub 3} lattice. Embedded nanophase Co precipitates were formed by the implantation of Co+ at an energy of 140 keV and a dose of 8 x l0{sup 16} ions/cm{sup 2} followed by annealing in a reducing atmosphere. The implanted/annealed Co depth profile, particle size distributions and shapes, and the orientational relationship between the nanophase ... continued below

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Honda, S.; Modine, F.A.; Haynes, T.E.; Meldrum, A.; Budai, J.D.; SOng, K.J. et al. November 29, 1999.

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Ion-implantation and thermal-processing methods have been used to form nanophase magnetic precipitates of metallic cobalt that are embedded in the near-surface region of single crystals of Al{sub 2}O{sub 3}. The Co precipitates are isolated, single-crystal particles that are crystallographically oriented with respect to the host Al{sub 2}O{sub 3} lattice. Embedded nanophase Co precipitates were formed by the implantation of Co+ at an energy of 140 keV and a dose of 8 x l0{sup 16} ions/cm{sup 2} followed by annealing in a reducing atmosphere. The implanted/annealed Co depth profile, particle size distributions and shapes, and the orientational relationship between the nanophase precipitates and the host crystal lattice were determined using RBS/channeling, transmission electron microscopy, and x-ray diffraction.

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INIS; OSTI as DE00755661

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  • 1999 Materials Research Society Fall Meeting, Boston, MA (US), 11/29/1999--12/03/1999

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  • Report No.: ORNL/CP-105518
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 755661
  • Archival Resource Key: ark:/67531/metadc709413

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  • November 29, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • Jan. 22, 2016, 11:05 a.m.

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Honda, S.; Modine, F.A.; Haynes, T.E.; Meldrum, A.; Budai, J.D.; SOng, K.J. et al. The Formation of High-Coercivity, Oriented, Nanophase Cobalt Precipitates in Al, article, November 29, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc709413/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.