The objective of this study is to develop a metal-matrix composite based on the intermetallic alloy Ni3Al reinforced with Al2O3 fibers, with improved high-temperature strength and lower density compared to the matrix material. This paper summarizes results of initial fabrication and mechanical tests on specimens produced using IC-15 [Ni-24% Al-0.24% B (at.%)] and IC-218 [Ni-16.5% Al-8% Cr-0.4% Zr-0.1% B (at.%)], with 20 vol. % Al2O3 fibers. Fabrication methods include both hot-pressing and hot-extrusion. Mechanical tests include four-point bending and tensile tests. The integrity of the fiber-matrix interface was studied and correlated with mechanical properties. Tensile ductilities of approximately 10% at room temperature were achieved for Ni3Al/Al2O3 composites with controlled material processing and interfacial structure. Fabrication of composites by hot-extrusion produced better tensile properties at room temperature, but superplastic behavior (i.e., low strengths, high ductilities) at 1000°C.
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S. V. Nair, J. K. Tien, and R. C. Bates, Int. Metal Rev. 30, 275 (1985).
C. T. Liu, C. L. White, and J. A. Horton, Acta Metall. 33, 213 (1985).
C. T. Liu, Proc. Micon 1986 Symposium. (ASTM, Feb. 1988), p. 222.
S. Nourbakhsh, F. L. Liang, and H. Margolin, to be published in Advanced Manufacturing Process.
T. N. Tiegs, unpublished results.
G. L. Povirk, J. A. Horton, C. G. McKamey, T. N. Tiegs, and S. R. Nutt, to be published in J. Mater. Sci.
J. A. Horton, J. V. Cathcart, and C. T. Liu, Oxid. Met. 29, 347 (1988).
V. K. Sikka and E. A. Loria, Nickel Metallurgy. Vol- 2. Industrial Applications of Nickel, (Canadian Institute of Mining and Metallurgy, Montreal, Canada, 1986), p. 293.
V. K. Sikka, Advanced Materials and Processing Techniques for Structural Applications, Proceedings of First ASM Europe Technical Conference, Paris, 1987, to be published.
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McKamey, C.G., Povirk, G.L., Horton, J.A. et al. Fabrication and Mechanical Properties of Ni3Al-Al2O3 Composites. MRS Online Proceedings Library 133, 609 (1988). https://doi.org/10.1557/PROC-133-609