Stainless Steel Nitriding With A High Nitrogen Ion Beam Flux And A High Power Plasma Torch, страница 2

a)

b)

c)

a)

b)

c)

Figure 3. SEM micrographs of wear tracks (load 8 N, sliding distance 152 m): a — unimplanted steel; b — implanted 1 hour at 400° C; c — implanted 1 hour at 500° C

conclusion

We have shown that ion flux and temperature have a dominant influence on the long range atomic transport of nitrogen in austenitic stainless steel under high flux particle beams. The thickness of nitrided layers in austenitic stainless steel can be significantly increased using an ultra high atomic nitrogen flux produced by a plasma torch at atmospheric pressure. The hardness and wear resistance of stainless steels can be durably enhanced by such surface treatments suggesting their great interest for potential technological applications.

References

1. Menthe E., Rie K. T., Surf. Coat. Technol. 116-119, 199–204, 1999.

2. Ozturk O., Williamson D. L., J. Appl. Phys. 77(8),3839–3850, 1995.

3. Riviere J. P., Meheust P., Villain J. P., Templier C., Cahoreau M., Abrasonis G., Pranevicius L., Surf. Coat. Technol. 158-159, 99–104, 2002.

4. Wei R., Vajo J. J., Matossian J. N., Wilbur P. J., Davis J. A., Williamson D. L., Collins G. A., Surf. Coat. Technol. 83, 235–242, 1996.

5. Pranevicius L. L., Valatkevicius, Valincius, V., Templier C., Riviere J. P., Pranevicius L., Surf. Coat. Technol,156, 219–224, 2002.

6. Pranevicius L. L., Milcius D., Abrasonis G., Nomgaudyte J., Pranevicius L., Templier C., Riviere J. P., Journal of High Temperature Processes, 7 (3), 299–306, 2003.

7. Williamson D. L., Davis J. A., Wilbur R. J., Vajo J. J., Wei R., Matossian J. N., Nucl. Instr. Meth. Phys. Res., B 127-128, 930–936, 1997.

8. Anwand W., Paranscandola S., Richter E., Brauer G., Coleman P. G., Moller W. Nucl. Instr. Meth. Phys. Res., B 127-128, 930–936, 2002.

9. Riviere J. P., Meheust P., Villain J. P., Surf. Coat. Technol. 158-159, 647–652, 2002.