Radiation Response of Rhombohedral Oxides

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The radiation response of three rhombohedral oxides, namely, sapphire ({alpha}-Al{sub 2}O{sub 3}), ilmenite (FeTiO{sub 3}), and geikielite (MgTiO{sub 3}), has been examined by irradiating electron transparent samples with 1 MeV Kr(+) and 1.5 MeV Xe(+)ions. The microstructural changes during irradiation were observed in situ in a high-voltage electron microscope using electron diffraction and microscopy. The irradiation conditions were designed to minimize beam heating and chemical effects due to the implanted ion. Of the three oxides studied, ilmenite is the most susceptible to radiation-induced amorphization while sapphire is the least susceptible. In all three materials, the critical temperature for amorphization was ... continued below

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17 p.

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Devanathan, R.; Weber, W.J.; Mitchell, J.N.; Sickafus, K.E. & Nastasi, M. December 31, 1997.

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Description

The radiation response of three rhombohedral oxides, namely, sapphire ({alpha}-Al{sub 2}O{sub 3}), ilmenite (FeTiO{sub 3}), and geikielite (MgTiO{sub 3}), has been examined by irradiating electron transparent samples with 1 MeV Kr(+) and 1.5 MeV Xe(+)ions. The microstructural changes during irradiation were observed in situ in a high-voltage electron microscope using electron diffraction and microscopy. The irradiation conditions were designed to minimize beam heating and chemical effects due to the implanted ion. Of the three oxides studied, ilmenite is the most susceptible to radiation-induced amorphization while sapphire is the least susceptible. In all three materials, the critical temperature for amorphization was below 300 K indicating good room temperature resistance to amorphization by energetic beams.

Physical Description

17 p.

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INIS; OSTI as DE98003019

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  • Modification of ceramics and semiconductors by ion beams conference, Ciocco (Italy), 17-23 May 1997

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  • Other: DE98003019
  • Report No.: LA-UR--97-4005
  • Report No.: CONF-9705230--
  • Grant Number: W-7405-ENG-36;AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 661944
  • Archival Resource Key: ark:/67531/metadc702439

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Office of Scientific & Technical Information Technical Reports

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  • December 31, 1997

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  • Sept. 12, 2015, 6:31 a.m.

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  • June 13, 2016, 1:21 p.m.

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Devanathan, R.; Weber, W.J.; Mitchell, J.N.; Sickafus, K.E. & Nastasi, M. Radiation Response of Rhombohedral Oxides, article, December 31, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc702439/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.