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Proceedings Paper

Ion-beam surface treatment: a new capability for rapid melt and resolidification of surfaces
Author(s): Regan W. Stinnett; D. C. McIntyre; R. G. Buchheit; John B. Greenly; Michael O. Thompson
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Paper Abstract

The emerging capability to produce high average power (5 - 250 kW) pulsed ion beams at 0.2 - 2 MeV energies is enabling us to develop a new, commercial-scale thermal surface treatment technology called Ion Beam Surface Treatment (IBEST). This new technique uses high energy, pulsed (<EQ 100 ns) ion beams to directly deposit energy in the top 2 - 20 micrometers of the surface of any material. The depth of treatment is controllable by varying the ion energy and species. Deposition of the energy with short pulses in a thin surface layer allows melting of the layer with relatively small energies and allows rapid cooling of the melted layer by thermal diffusion into the underlying substrate. Typical cooling rates of this process (109 - 1010 K/sec) cause rapid resolidification, resulting in the production of non-equilibrium microstructures (nano-crystalline and metastable phases) that have significantly improved corrosion, wear, and hardness properties. We have conducted IBEST feasibility experiments with results confirming surface hardening, nanocrystalline grain formation, metal surface polishing, controlled melt of ceramic surfaces, and surface cleaning.

Paper Details

Date Published: 1 May 1994
PDF: 6 pages
Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174600
Show Author Affiliations
Regan W. Stinnett, Sandia National Labs. (United States)
D. C. McIntyre, Sandia National Labs. (United States)
R. G. Buchheit, Sandia National Labs. (United States)
John B. Greenly, Cornell Univ. (United States)
Michael O. Thompson, Cornell Univ. (United States)

Published in SPIE Proceedings Vol. 2259:
XVI International Symposium on Discharges and Electrical Insulation in Vacuum
Gennady A. Mesyats, Editor(s)

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