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Microstruciture and Properties of Intermetallic Matrix Composites Produced by Reaction Synthesis

  • D. E. Alman (a1), J. A. Hawk (a1), C. P. Dogan (a1), M. Ziomek-Moroz (a2) and A. V. Petty (a1)...

Abstract

In this US Bureau of Mines study, a variety of TiAl based composites were produced in situ by reaction synthesis. Mixtures of elemental Ti, Al and B and Ti, Al, and Si powders were reactive hot-pressed to form TiAl reinforced with 10, 20, 25 or 60 vol. pct. TiB2 or Ti5Si3. Microstructural evaluation of the resultant composites confirmed that the reaction products were primarily TiAl and TiB2 or Ti5S3, with a small amount of Ti3Al. The hot-press temperature and pressure had a significant effect on the density of the composites. In general, higher temperatures and initiating the reaction under pressure promoted dense composites. Room temperature biaxial flexure strength tests indicated that the addition of the reinforcing phases can improve the strength of TiAl. Potentiodynamic experiments revealed that TiAl, TiAl+TiB2 and TiAl+Ti5Si3 composites display active-passive corrosion behavior in both acidic and alkaline solutions.

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1 Nishiyama, Y., Miyatshita, T., Isobe, S. and Noda, T., in High Temperature Aluminides and Intermetallics, eds. Whang, S.H. et al. , (TMS: Warrendale, Pa, 1990) p.557.
2. Flemings, M.C., Adv. Marls, and Processes, 145 (1), 22 (1994).
3. Bose, A., Moore, B., German, R.M. and Stoloff, N.S., J. Metals, 40 (9), 14 (1988).
4. Alman, D.E. and Stoloff, N.S., Intl. J of Powder Met., 27 (1), 29 (1991).
5. Rawers, J.C. and Wrzesinski, W.R., J. Mater. Sci., 27, 2877 (1992).
6. Alman, D.E. and Stoloff, N.S., Scripta Met. etMater., 28, 1525 (1993).
7. Alman, D.E., Hawk, J.A., Petty, A.V. Jr., and Rawers, J.C., JOM, 46 (3), 31 (1994).
8. Munir, Z.A., Bull. Am. Ceram. Soc.,67 (2), 34 (1988).
9. Alman, D.E., Hawk, J.A., Dogan, C.P. and Petty, A.V. Jr., Presented at the 18th Annual Conference on Composite Materials (Restricted Sessions), Cocoa Beach, Florida Jan. 12–14, 1994. in press.

Microstruciture and Properties of Intermetallic Matrix Composites Produced by Reaction Synthesis

  • D. E. Alman (a1), J. A. Hawk (a1), C. P. Dogan (a1), M. Ziomek-Moroz (a2) and A. V. Petty (a1)...

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