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Tailored MoSi2/SiC composites by mechanical alloying

Published online by Cambridge University Press:  31 January 2011

S. Jayashankar  and
M.J. Kaufman
S. Jayashankar
Affiliation:
Department of Materials Science and Engineering, The University of Florida, Gainesville, Florida 32611-2066
M.J. Kaufman
Affiliation:
Department of Materials Science and Engineering, The University of Florida, Gainesville, Florida 32611-2066
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Abstract

MoSi2-based composites have been synthesized through the mechanical alloying (MA) of elemental molybdenum and silicon powders with and without carbon additions. The interplay between the phase formation sequence in the powders and the microstructural evolution in the consolidated samples is described. It is shown that the glassy SiO2 phase characteristic of conventional powder processed MoSi2 can be effectively eliminated by combining mechanical alloying, carbon additions, and an in situ carbothermal reduction reaction. Using this approach, composites consisting of uniformly distributed micron-size SiC in an MoSi2 matrix can be formed. The effect of important processing variables such as the extent of carbon additions, extraneous iron pickup during MA, partial pressures of oxygen, consolidation temperatures, and consolidation atmospheres is discussed based on the evidence obtained from DTA, TGA, TEM, and XRD.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 6 , June 1993 , pp. 1428 - 1441
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

1Chart, T. G., Metal Science 8, 344 (1974).CrossRefGoogle Scholar
2Searcy, A. W. and Tharp, A. G., J. Phys. Chem. 64, 1539 (1960).CrossRefGoogle Scholar
3Berkowitz-Mattuck, J. B., Blackburn, P. E., and Felten, E. J., Trans. Metall. Soc. AIME 233, 1093 (1965).Google Scholar
4Aikin, R.M. Jr, Scripta Metall. 26, 1025–1030 (1992).CrossRefGoogle Scholar
5Meschter, P. J., Metall. Trans. 23A, 1763–1772 (1992).CrossRefGoogle Scholar
6Xiao, L. and Abbaschian, R., Mater. Sci. Eng. A155, 135 (1992).CrossRefGoogle Scholar
7Maxwell, W.A., NACA RM E52B06, 1952.Google Scholar
8Maloy, S., Heuer, A. H., Lewandowski, J. J., and Petrovic, J. J., J. Am. Ceram. Soc. 74, 2704 (1991).CrossRefGoogle Scholar
9Hardwick, D. A., Martin, P. L., and Moores, R. J., Scripta Metall. 27, 391 (1992).CrossRefGoogle Scholar
10Schwarz, R. B., Srinivasan, S. R., Petrovic, J. J., and Maggiore, C. J., Mater. Sci. Eng. A155, 75 (1992).CrossRefGoogle Scholar
11Wei, G.C., J. Am. Ceram. Soc. 66, C–111 (1983).CrossRefGoogle Scholar
12Ishizaki, K., Acta Metall. Mater. 38, 2059 (1990).CrossRefGoogle Scholar
13Atomic Energy Review, special issue No. 7, edited by Brewer, L. (International Atomic Energy Agency, Vienna, Austria, 1980).Google Scholar
14Gokhale, A. B. and Abbaschian, G. J., J. Phase Equilibria 12, 493 (1991).CrossRefGoogle Scholar
15Villars, P. and Calvert, L. D., Pearson's Handbook of Crystallo-graphic Data for Intermetallic Phases (ASM, Metals Park, OH, 1985), Vols. 1 and 2.Google Scholar
16Nowotny, H., Parthe, E., Kieffer, R., and Benesovsky, F., Monatsh. Chemie 85, 255 (1954).CrossRefGoogle Scholar
17Parthe, E., Jeitschko, W., and Sadagopan, V., Acta Crystallogr. 19, 1031 (1965).CrossRefGoogle Scholar
18Aronson, B., Acta Chem. Scand. 9, 1107 (1955).CrossRefGoogle Scholar
19Schachner, H., Cerwenka, E., and Nowotny, H., Monatsh. Chemie 85, 245 (1954).CrossRefGoogle Scholar
20Brewer, L. and Krikorian, O., J. Electrochem. Soc. 103, 38 (1956).CrossRefGoogle Scholar
21Loo, F.J. J. van, Smet, F.M., and Rieck, G.D., High Temp. High Press. 14, 25 (1982).Google Scholar
22Silva, A. Costae and Kaufman, M.J., submitted to Metall. Trans., 1993.Google Scholar
23Loopstra, O. B., Sloof, W. G., Keijser, Th.H. de, Mittemeijer, E. J., Radelaar, S., Kuiper, A. E. T., and Wolters, R. A. M., J. Appl. Phys. 63, 4960 (1988).CrossRefGoogle Scholar
24Doland, C. M. and Nemanich, R. J., J. Mater. Res. 5, 2854 (1990).CrossRefGoogle Scholar
25d'Heurle, F. M., Petersson, C. S., and Tsai, M. Y., J. Appl. Phys. SI, 5976 (1980).CrossRefGoogle Scholar
26Koch, C. C., personal communication, 1992.Google Scholar
27Raynor, G.V. and Rivlin, V.G., Int. Metals Rev. 30, 68 (1985).Google Scholar
28Singh, M., presented at the 94th Annual Meeting of the American Ceramic Society, Minneapolis, MN, 1992.Google Scholar
29Maloney, M.J. and Hecht, R.J., Mater. Sci. Eng. A155, 19 (1992).CrossRefGoogle Scholar