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Observed Changes in Fracture Strength Following Laser Irradiation and Ion Beam Mixing of Ni Overlayers on Sintered Alpha-SiC

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Fracture Mechanics of Ceramics

Abstract

Pulsed laser annealing and ion beam mixing are currently being investigated as surface modification techniques in an attempt to enhance the mechanical properties of poly crystalline α-SiC. Thin Ni overlayers (20nm -100nm) are evaporated onto the SiC surface. The specimens are subsequently irradiated with pulses of a ruby or excimer (KrF or XeCl) laser or bombarded with high energy Si+ or Xe+ ions. Following laser irradiation, the fracture strength of the SiC is increased by as much as ≃50%, but after ion beam mixing, no strength increase is observed. Weibull statistics are used to characterize the SiC fracture strength data before and after surface modification. Cross-sectional transmission electron microscopy (X-TEM), scanning electron microscopy (SEM), secondary ion mass spectroscopy (SIMS), and Rutherford backs cattering (RBS) techniques are used to characterize the modified SiC in order to determine the cause for the increase in fracture strength and the extent of mixing as a result of the surface modification.

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Author information

Authors and Affiliations

  1. Department of Materials Engineering, North Carolina State University, Box 7907, Raleigh, NC, 27695-7907, USA

    K. L. More & R. F. Davis

Authors
  1. K. L. More
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  2. R. F. Davis
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Editor information

Editors and Affiliations

  1. College of Engineering, University of Washington, Seattle, Washington, USA

    R. C. Bradt

  2. Department of Materials and Mineral Engineering, University of California, Berkeley, California, USA

    A. G. Evans

  3. Department of Materials Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA

    D. P. H. Hasselman

  4. Rockwell International, Science Center, Thousand Oaks, California, USA

    F. F. Lange

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© 1986 Plenum Press, New York

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More, K.L., Davis, R.F. (1986). Observed Changes in Fracture Strength Following Laser Irradiation and Ion Beam Mixing of Ni Overlayers on Sintered Alpha-SiC. In: Bradt, R.C., Evans, A.G., Hasselman, D.P.H., Lange, F.F. (eds) Fracture Mechanics of Ceramics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-7026-4_19

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  • DOI: https://doi.org/10.1007/978-1-4615-7026-4_19

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4615-7028-8

  • Online ISBN: 978-1-4615-7026-4

  • eBook Packages: Springer Book Archive

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