Amorphous surface layers in Ti-implanted Fe
Implanting Ti into high-purity Fe results in an amorphous surface layer which is composed of not only Fe and Ti, but also C. Implantations were carried out at room temperature over the energy range 90 to 190 keV and fluence range 1 to 2 x 10/sup 16/ at/cm/sup 2/. The Ti-implanted Fe system has been characterized using transmission electron microscopy (TEM), ion backscattering and channeling analysis, and (d,p) nuclear reaction analysis. The amorphous layer was observed to form at the surface and grow inward with increasing Ti fluence. For an implant of 1 x 10/sup 17/ Ti/cm/sup 2/ at 180 keV the layer thickness was 150 A, while the measured range of the implanted Ti was approx. 550 A. This difference is due to the incorporation of C into the amorphous alloy by C being deposited on the surface during implantation and subsequently diffusing into the solid. Our results indicate that C is an essential constituent of the amorphous phase for Ti concentrations less than or equal to 10 at. %. For the 1 x 10/sup 17/ Ti/cm/sup 2/ implant, the concentration of C in the amorphous phase was approx. 25 at. %, while that of Ti was only approx. 3 at. %. A higher fluence implant of 2 x 10/sup 17/ Ti/cm/sup 2/ produced an amorphous layer with a lower C concentration of approx. 10 at. % and a Ti concentration of approx. 20 at. %.
- Research Organization:
- Sandia Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- EY-76-C-04-0789
- OSTI ID:
- 5845114
- Report Number(s):
- SAND-79-2228C; CONF-791112-36; TRN: 80-002069
- Resource Relation:
- Conference: Symposium on the scientific basis for nuclear waste management, Boston, MA, USA, 26 Nov 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON
DIFFUSION
IRON
ION IMPLANTATION
TITANIUM
AMORPHOUS STATE
CORROSION
SPUTTERING
TRANSMISSION ELECTRON MICROSCOPY
WEAR
CHEMICAL REACTIONS
ELECTRON MICROSCOPY
ELEMENTS
METALS
MICROSCOPY
NONMETALS
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties
360102 - Metals & Alloys- Structure & Phase Studies