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An Experimental Study of Powder Melting During Low Pressure Plasma Deposition

Published online by Cambridge University Press:  15 February 2011

M. Paliwal  and
D. Apelian
M. Paliwal
Affiliation:
Department of Materials Engineering, Drexel University, Philadelphia, PA 19104
D. Apelian
Affiliation:
Department of Materials Engineering, Drexel University, Philadelphia, PA 19104
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Abstract

Low pressure plasma deposition (LPPD), a recent advancement in plasma spray metallizing, is currently being developed for high performance materials applications. An experimental study of particle melting within the plasma jet was pursued to identify the effect of the process variables and the material properties on the resultant deposit. In tandem the experimental results have been utilized in the development and verification of a mathematical model for the melting of powder particles during the process.

Two binary iron based model alloys - Fe-20 wt% Mn and Fe-20 wt% Cu - were plasma sprayed using Ma 2.4 and Ma 3 guns. Two different methods were used to evaluate the degree of particle melting within the plasma jet. The first method intercepts the particle path in the plasma jet with a glass slide, whereas in the second method the powder particles are collected in free flight using a powder collector (resolidification of powder particles occurs before they impact the collector walls). The droplets which impacted on glass slides and the collected (using the powder collector) powder particles were studied for mode and degree of powder particle melting using scanning electron microscopy. “Sweet spot” deposits (with no relative motion between the plasma gun and the substrate) were also made for the two model alloys in different size ranges using the Ma 2.4 and Ma 3 guns. The resulting deposits were metallographically evaluated. Mode and degree of particle melting injected under different process variables as well as the resultant deposit structures are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 30: Symposium L – Plasma Processing and Synthesis of Materials I , 1983 , 187
Copyright
Copyright © Materials Research Society 1984

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References

REFERENCES

1. Klement, W., Willens, R. and Duwez, P.:Nature, 187, 869 (1960).Google Scholar
2. Lebo, M. and Grant, N.J.: Met. Trans., 5, 1547 (1974).Google Scholar
3. Grant, N.J. in: Rapidly Quenched Metals III, Vol. 2, Cantor, B., ed. (Metals Society, London 1976) p. 172.Google Scholar
4. Holiday, P.R., Cox, A.R. and Patterson, R.J. in: Rapid Solidification and Processing - Principles and Technologies, Mehrabian, R., Kear, B.H. and Cohen, M., eds. (Claitors Publishing Division, Baton Rouge, 1978) p. 246.Google Scholar
5. Liebermann, H.H.: Coaxial Jet Melt-Spinning of Glassy Alloy Ribbons, Technical Information Series, Report No. 80 CRD 117 (G.E. Corporation, Schenectady, New York 1980).Google Scholar
6. Breinan, E.M. and Kear, B.H. in: Rapid Solidification Processing Principles and Technologies, Mehrabian, R., Kear, B.H. and Cohen, M., eds., (Claitors Publishing Division, Baton Rouge, 1978) p. 87.Google Scholar
7. Mash, D.R. and Brown, I.M.: Matls. Engg. Quarterly, Feb. 1964, p. 18.Google Scholar
8. Safai, S. and Herman, H. in: Ultra Rapid Quenching of Liquid Alloys, Vol. 20 of Treatise on Materials Science and Technology, Herman, H., ed. (Academic Press, New York, 1981) pp. 183–214.Google Scholar
9. Wilms, V. and Herman, H.: Proc. Eighth International Thermal Spraying Conference (American Welding Society, Florida 1976) p. 236.Google Scholar
10. McPherson, R.: J. of Materials Science, 15,3141 (1980).Google Scholar
11. Moss, M.: Acta Metallurgica 16, 321 (1968).Google Scholar
12. Krishnanand, K.D. and Cahn, R.W. in: Rapidly Quenched Metals, Grant, N.J. and Giessen, B.C., eds., (MIT, Cambridge, Mass., 1976) p. 67.Google Scholar
13. Moss, M., Smith, D.L. and Lefever, R.A.: Appl. Phys. Lett., 5, 120 (1964).Google Scholar
14. Giessen, B.C., et al. : Metall. Trans. 8A, 364 (1977).Google Scholar
15. Muehlberger, E.: Proc. Seventh International Thermal Spraying Conference, (The Welding Institute, London 1973) p. 245.Google Scholar
16. Jackson, M.R., Rairden, J.R., Smith, J.S. and Smith, R.W.: J. of Metals, 33(11), 23 (1981).Google Scholar
17. Jackson, M.R., Smashey, R.W. and Peterson, L.G. in: Proc. Rapid Solidification Processing, Principles and Technologies III, Mehrabian, R. ed. (National Bureau of Standards, Gaithersburg, Dec. 6–8, 1982) p. 198.Google Scholar
18. Siemers, P.A.: Rapid Solidification Plasma Deposition (RSPD) for Fabrication of Advanced Aircraft Gas Turbine Components, Contract F33615–81–C5156, Interim Reports, Jan. 15, 1982, Apr. 15, 1982, July 15, 1982, Final Report Dec. 31, 1982. Air Force Systems Command, AFWAL, Wright Patterson Air Force Base, OH.Google Scholar
19. Smith, R.W., Paliwal, M. and Apelian, D., in: Proc. Rapid Solidification Processing and Technologies III, Mehrabian, R., ed., (National Bureau of Standards, Gaithersburg, Dec. 6–8, 1982) p. 105.Google Scholar
20. Cheeks, T.L., Glicksman, M.E., Jackson, M.R. and Hall, E.L., in: Proc. Rapid Solidification Processing Principles and Technologies III, Mehrabian, R., ed., (National Bureau of Standards, Gaithersburg, Dec. 6–8, 1982) p. 118.Google Scholar
21. Smith, R.W., Rigney, D.V. and Rairden, J.R. in: Proc. Rapid Solidification Processing Principles and Technologies III, Mehrabian, R., ed., (National Bureau of Standards, Gaithersburg, Dec. 6–8, 1982) p. 468.Google Scholar
22. Ritter, A.M. and Jackson, M.R. in: Proc. Rapid Solidification Processing Principles and Technologies III, Mehrabian, R., ed., (National Bureau of Standards, Gathersburg, Dec. 6–8, 1982) p. 270.Google Scholar
23. Wei, D., Apelian, D., Paliwal, M. and Correa, S.M.: “Melting of Powder Particles in a Low Pressure Plasma Jet”, Annual Meeting of Materials Research Society. Paper No. L4.6, Boston, MA, Nov. 14–17, 1983.Google Scholar