Hostname: page-component-745bb68f8f-s22k5 Total loading time: 0 Render date: 2025-01-26T04:53:01.245Z Has data issue: false hasContentIssue false
  • English
  • Français

Nucleation During the Solidification of Atomized Droplets Catalyzed by Spherically-Shaped Oxide Particles

Published online by Cambridge University Press:  26 February 2011

Matthew R. Libera ,
Gregory B. Olson  and
John B. Vander Sande
Matthew R. Libera
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology, Cambridge, MA 02139
Gregory B. Olson
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology, Cambridge, MA 02139
John B. Vander Sande
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology, Cambridge, MA 02139
Get access

Abstract

Nucleation temperatures are calculated for the case of solidification in atomized metal droplets where spherical substrate particles act as nucleation catalysts. Following the method of Fletcher, the effect of substrate size on catalytic potency is illustrated, and the model is applied to the nucleation of bcc solid from pure, liquid iron containing oxide substrate particles as catalysts. Supercooling data from the literature are used to determine wetting angles for alumina, silica, and rare-earth oxide. Oxide particle-size distributions are then used to predict the supercooling behavior of atomized liquid droplets based on the probability that a given size of droplet will contain a particular size of substrate particle. A transition size regime is found separating droplet sizes undergoing very small and very large supercoolings, respectively. This is discussed in terms of the types and number densities of inclusions present during atomization of the melt.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 80: Symposium G – Science and Technology of Rapidly Quenched Alloys , 1986 , 245
Copyright
Copyright © Materials Research Society 1987

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. Levi, C. and Mehrabian, R., Metall. Trans. 13A, 221 (1982).CrossRefGoogle Scholar
2. Cohen, M. and Mehrabian, R., Rapid Solidification Processing and Properties III, NBS Conference, December (1982).Google Scholar
3. Turnbull, D., J. Chem. Phys. 20, 411–424 (1952).CrossRefGoogle Scholar
4. Fletcher, N.H., J. Chem. Phys. 29, 572 (1958); 31, 1136 (1959); 38, 237 (1963).CrossRefGoogle Scholar
5. Hirth, J.P., Metall. Trans. 9A, 401 (1978).Google Scholar
6. Turnbull, D., Physics of Non-crystalline Solids, edited by Prins, J.W. (North Holland, Amsterdam, 1964), p. 41.Google Scholar
7. Spaepen, F. and Meyer, R., Scripta Metall. 10, 257–263 (1976); F. Spaepen, Acta Metall. 23, 729–743 (1975).CrossRefGoogle Scholar
8. Thompson, C.V., Ph. D. Thesis, Harvard University, 1981.Google Scholar
9. Chuang, Y-Y. et al., Metall. Trans. 17A, 1373 (1986).CrossRefGoogle Scholar
10. Smithells Metals Reference Book, 6th ed., (Butterworths, London, 1983).Google Scholar
11. Kelly, T.F. et al., Metall. Trans. 15A, 819–833 (1984).CrossRefGoogle Scholar
12. Ohashi, T. et al., Trans. ISIJ 17, 262–270 (1977).Google Scholar
13. G.E. Kimble and R.S. Halford, private communication to: Pound, G.M. and Mer, V.K. La, J. Am. Cer. Soc. 74, 2323 (1952); D. Turnbull, J. Chem. Phys. 20, 411–424 (1952).CrossRefGoogle Scholar
14. Olson, G.B. et al., Phase Transitions in Condensed Systems-Experiment and Theory, edited by Cargill, G.S. III, MRS Proceedings December, 1985. To be published.Google Scholar
15. Chen, I-W et al., Acta Metall. 33, 1847–1859 (1985).Google Scholar
16. Sims, C.E., Trans AIME 215, 367–393 (1959).Google Scholar
17. Libera, M. and Sande, J.B. Vander, Scripta Metall. 18, 1303–1308 (1984).Google Scholar