Abstract
Electron and optical electron microscopy, together with energy dispersive X-ray (EDX) chemical microanalysis, were employed to examine the microstructure of a pressure-cast composite consisting of a Ti-48.4 at. pct Al-1 at. pct Mn matrix reinforced with DuPont’s PRD-166 A12O3 fibers containing 20 wt pct partially stabilized ZrO2. The originally cylindrical fibers were found to have a scalloped surface, and a zone just below the surface was free of ZrO2. In addition, the fibers contained entrapped TiAl, and a small portion of the fiber periphery was covered by ZrO2 particles, which were free of the Y2O3 and HfO2 oxides present in the ZrO2 within the fibers. The matrix consisted of a mixture of TiAl and a lamellar structure of TiAl and Ti3Al and contained Zr not originally present in the matrix alloy. An analysis of the origin of this microstructure is presented.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H.A. Lipsitt, D. Shechtman, and R.E. Schafrik:Metall. Trans. A, 1975, vol. 6A, pp. 1991–96.
J.B. McAndrew and H.D. Kessler:J. Met., 1956, vol. 8, pp. 1348–53.
S.M.L. Sastry and H.A. Lipsitt:Metall. Trans. A, 1977, vol. 8A, pp. 299–308.
T. Tsujimoto and K. Hashimoto:High-Temperature Ordered Intermetallic Alloys III, MRS Symp. Proc, C.T. Liu, A.I. Taub, N.S. Stoloff, and C.C. Koch, eds., 1989, vol. 133, pp. 391–96.
T. Hanamura, R. Uemori, and M. Tanino:J. Mater. Res., 1988, vol. 3, pp. 656–64.
S.F. Baumann, P.K. Brindley, and S.D. Smith:Metall. Trans. A, in press.
P.K. Brindley:High-Temperature Ordered Intermetallic Alloys II, MRS Symp. Proc, N.S. Stoloff, C.C. Koch, C.T. Liu, and O. Izumi, eds., 1987, vol. 81, pp. 419–24.
S. Nourbakhsh, H. Margolin, and F.L. Liang:Metall. Trans. A, 1989, vol. 20A, pp. 2159–66.
S. Nourbakhsh, F.L. Liang, and H. Margolin:High-Temperature Ordered Intermetallic Alloys III, MRS Symp. Proc, C.T. Liu, A.I. Taub,N.S. Stoloff, and C.C. Koch, eds., 1989, vol. 133, pp. 459–64.
J.C. Romine:Ceram. Eng. Sci. Proc, 1987, vol. 8 (7–8), pp. 755–65.
S. Nourbakhsh, F.L. Liang, and H. Margolin:J. Mater. Sci. Lett., in press.
S. Nourbakhsh, F.L. Liang, and H. Margolin:J. Phys. E, 1988, vol. 21, pp. 898–902.
Y.D. Hahn and S.H. Whang: Polytechnic University, Brooklyn, NY, unpublished research, 1989.
J.P. Abriata, R. Versaci, and J. Garces:Binary Alloy Phase Diagrams, T.B. Massalski, ed., ASM, Metals Park, OH, 1986, vol. 2, pp. 1797 and 800.
A.G. Evans and A.H. Heuer:J. Am. Ceram. Soc, 1980, vol. 63, pp. 241–48.
J.L. Murray:Binary Alloy Phase Diagrams, T.B. Massalski, ed., ASM, Metals Park, OH, 1986, vol. 1, pp. 173 and 175.
C. McCullough, J.J. Valencia, H. Mateos, C.G. Levi, and R. Mehrabian:Scripta Metall., 1988, vol. 22, pp. 1131–36.
S.A. Jones, R.D. Shull, A.J. McAlister, and M.J. Kaufman:Scripta Metall., 1988, vol. 22, pp. 1235–40.
M.J. Blackburn:The Science, Technology and Application of Titanium, R. Jaffee and N.E. Promisel, eds., Pergamon Press, 1970, pp. 633–43.
O. Kubaschewski and C.B. Alcock:Metallurgical Thermochemistry, 5th ed., Pergamon Press, New York, NY, 1979.
V. Jayaram, B.J. Dalgleish, and A.G. Evans:J. Mater. Res., 1988, vol. 3, pp. 764–71.
M. Hoch, R.L. Dean, C.K. Hwu, and S.M. Wolosin:Trans. AIME, 1961, vol. 221, pp. 1162–73.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nourbakhsh, S., Liang, F.L. & Margolin, H. Interaction of Al2O3-ZrO2 fibers with a Ti-Al matrix during pressure casting. Metall Trans A 21, 213–219 (1990). https://doi.org/10.1007/BF02656438
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02656438