Ion beam surface treatment: A new capability for rapid melt and resolidification of surfaces
- Sandia National Labs., Albuquerque, NM (United States)
- Cornell Univ., Ithaca, NY (United States)
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 technique uses high energy, pulsed ({le}100 ns) ion beams to directly deposit energy in the top 2--20 micrometers of the surface of any material. 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 (10{sup 9}10{sup 10} K/sec) cause rapid resolidification, resulting in 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, nanocrystaline grain formation, metal surface polishing, controlled melt of ceramic surfaces, and surface cleaning.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10136232
- Report Number(s):
- SAND--94-0093C; CONF-9405116--1; ON: DE94008955; BR: GB0103012
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
070205
36 MATERIALS SCIENCE
360000
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
CORROSION RESISTANCE
CUTTING TOOLS
INDUSTRIAL APPLICATIONS
RADIATION PROCESSING
ION BEAMS
MATERIALS
POLISHING
STEELS
SURFACE CLEANING
SURFACE HARDENING
SURFACE TREATMENTS
TITANIUM BASE ALLOYS
USES
VANADIUM ALLOYS