Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-26T22:17:24.018Z Has data issue: false hasContentIssue false
  • English
  • Français

A structural investigation of a plasma sprayed Ni-Cr based alloy coating

Published online by Cambridge University Press:  18 February 2016

S. Sampath ,
R. A. Neiser ,
H. Herman ,
J. P. Kirkland  and
W. T. Elam
S. Sampath
Affiliation:
Department of Materials Science and Engineering, State University of New York, Stony Brook, New York 11794-2275
R. A. Neiser
Affiliation:
Department of Materials Science and Engineering, State University of New York, Stony Brook, New York 11794-2275
H. Herman
Affiliation:
Department of Materials Science and Engineering, State University of New York, Stony Brook, New York 11794-2275
J. P. Kirkland
Affiliation:
Naval Research Laboratory, Washington, DC 20375-5000
W. T. Elam
Affiliation:
Naval Research Laboratory, Washington, DC 20375-5000
Get access

Extract

A Ni-Cr based hardfacing alloy has been plasma sprayed in ambient and low pressure atmospheres onto mild steel substrates. These coatings exhibit excellent wear and corrosion resistance; however, the significance of microstructure on properties has not been reported. This study relates the structure of the sprayed coatings to the processing conditions. X-ray diffraction results indicate phase separation in air plasma sprayed deposits, while low pressure plasma sprayed deposits exhibit a single supersaturated solid solution. Annealing of the air plasma sprayed coating shows dissolution of the bcc chromium phase, confirming its metastable nature. These results were confirmed using Extended X-ray Absorption Fine Structure (EXAFS) analysis, which further suggests a highly disordered structure, with partial oxidation of selected alloying elements, such as chromium. Transmission electron microscopy indicates a wide variety of microstructures in the air plasma sprayed deposit. In the case of low pressure sprayed deposit, the microstructures are homogeneous and uniform.

Type
Research Article
Information
Journal of Materials Research , Volume 8 , Issue 1 , January 1993 , pp. 78 - 86
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Safai, S. and Herman, H., Ultra Rapid Quenching, edited by Herman, H., Treatise in Mater. Sci. and Technol. (Academic Press, New York, 1981), Vol. 20, p. 183.Google Scholar
2. Das, S.K., Norin, E.M., and Bye, R.L., in Rapidly Solidified Metastable Materials, edited by Kear, B. H. and Giessen, B. C. (Mater. Res. Soc. Symp. Proc. 28, Pittsburgh, PA, 1984), p. 233.Google Scholar
3. Panchanathan, V., Tsai, C. L., and Whang, S., in Rapidly Solidified Amorphous and Crystalline Alloys, edited by Kear, B. H., Giessen, B.C., and Cohen, M. (Mater. Res. Soc. Symp. Proc. 8, Pittsburgh, PA, 1982), p. 137.Google Scholar
4. Sampath, S. and Herman, H., Proc. 2nd National Thermal Spray Conference, Cincinnati, OH, edited by Houck, D.L. (ASM INTERNATIONAL, 1989), p. 1.Google Scholar
5. Sampath, S., Ph.D. Thesis, State University of New York, Stony Brook, NY (1989).Google Scholar
6. Sampath, S. and Herman, H., Proc. Northeast Regional Protective Coatings Conference, edited by Yazici, R. (TMS, Warrendale, PA, 1989), p. 145.Google Scholar
7. Murakami, K., Okamoto, T., Miyamoto, Y., and Nakazono, S., Mater. Sci. Eng. A117, 207 (1989).Google Scholar
8. Murakami, K., Asako, H., Okamoto, T., and Miyamoto, Y., Mater. Sci. Eng. A123, 261 (1990).CrossRefGoogle Scholar
9. Neiser, R.A., Kirkland, J.P., Elam, W.T., and Sampath, S., Nucl. Instrum. Methods in Physics Res. A266, 220 (1988).Google Scholar
10. Metco 700-Engineering Guide to Coating Performance and Applications, Metco-Perkin-Elmer Corp., Westbury, NY.Google Scholar
11. Sampath, S., Katz, B., and Herman, H., Mém. et Etudes Sci. Rev. Métall. May (1991), p. 289.Google Scholar
12. Huang, S. C. and Chang, K. M., J. Mater. Sci. 19, 1220 (1984).CrossRefGoogle Scholar
13. Ritter, A. M. and Jackson, M. R., Rapid Solidification Processing—Principles & Technologies III, edited by Mehrabian, R., 270 (1982).Google Scholar
14. X-ray Absorption, edited by Koningsberger, D. C. and Prinz, R. (John Wiley, New York, 1988), ISBN 0-471-87547-3.Google Scholar
15. Idzerda, Y.U., Elam, W.T., Jonker, B.T., and Prinz, G.A., Phys. Rev. Lett. 62 (21), 2480 (1989).Google Scholar
16. Elam, W.T., private communication.Google Scholar
17. Sampath, S., unpublished work.Google Scholar
18. Krishnanand, K. D. and Cahn, R. W., Proc. 2nd Int. Conf. on Rapid Quenching, Section I, edited by Giessen, B. C. and Grant, N. J. (1976), p. 67.Google Scholar
19. Moss, M., Acta Metall. 16, 321 (1968).Google Scholar
20. Sampath, S. and Herman, H., Proc. Int. Thermal Spray Conference, edited by Bucklow, I. A. (The Welding Institute, London, Paper 53, 1989).Google Scholar
21. Chen, H.S. and Turnbull, D., Acta Metall. 17, 1021 (1969).Google Scholar
22. Tanner, L. E. and Ray, R., Scripta Metall. 11, 783 (1977).Google Scholar
23. Thadani, N. N., Mutz, A. H., and Vreeland, T., Scripta Metall. 20, 581 (1986).Google Scholar
24. Millan, M. and Conde, A., Mater. Lett. 8 (6,7), 241 (1989).Google Scholar
25. Sampath, S. and Neiser, R. A., unpublished results. Google Scholar