Paper Title:
Characterization of Nickel Implanted α-Al2O3
  Abstract

Optical and structural properties of single crystalline α-Al2O3 were changed by the implantation of high fluences of Ni ions. Sapphire single crystals with <0001> orientation were implanted at room temperature with 150 keV nickel ions. Implantation fluences were in the range 0.3×1015 to 1.8×1017 cm-2. After implantation the optical absorption spectra reveal the presence of a band peaking in the region 300 - 500 nm, depending on the retained fluence. This is usually related to the presence of metallic particles. X-ray diffraction (XRD) studies show the presence of metallic Ni after implantation. Annealing in oxidizing atmosphere promotes the ecrystallization of the host matrix along with the formation of NiAl2O4 as deduced from Rutherford Backscattering Spectrometry (RBS) and confirmed through XRD. In vacuum the particles formed are metallic like with some Ni spinel also present. The control of the implantation fluence, temperature and annealing atmosphere allows tailoring the component phases.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
348-352
DOI
10.4028/www.scientific.net/MSF.514-516.348
Citation
C. Marques, N. Franco, R. C. da Silva, A. Wemans, M. J.P. Maneira, E. Alves, "Characterization of Nickel Implanted α-Al2O3", Materials Science Forum, Vols. 514-516, pp. 348-352, 2006
Online since
May 2006
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