Reaction synthesis, microstructure, and mechanical properties of in situ composite NiAl-Al 2 O 3 -TiC
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This work was carried out under Grant No. 1608-I from the Indo-French Centre for the Promotion of Advanced Research (New Delhi). The authors are thankful to Professors E.C. Subbarao and A. Ghosh for their critical remarks. The authors are thankful to Professor Mathai Joseph, Director, TRDDC (Pune) for providing support and encouragement. REFERENCES 1. H.C. Brinkman: Appl. Sci. Res., 1947, vol. A1. pp. 81-86. 2. B. Basu: Proc. 7th Int. Conf. on Numerical Method for Thermal Problems, Stanford University, Stanford, CA, 1991, pp. 131-45. 3. C. Prakash: Num. Heat Transfer, 1990, Part B, vol. 18, pp. 171-89. 4. A.K. Singh and B. Basu: Metall. Mater. Trans. B, 1995, vol. 26B, pp. 1069-82. 5. P.J. Prescott and F.P. Incropera: Metall. Trans. B, 1991, vol. 22B, pp. 529-40. 6. M.C. Schneider and C. Beckermann: Metall. Mater. Trans. A, 1995, vol. 26A, pp. 2373-88. 7. R. West: Metall. Trans. A, 1985, vol. 16A, p. 693. 8. A.K. Singh and B. Basu: Proc. 3rd ISHMT-ASME Heat and Mass Transfer Conf., Narosa Publishing House, New Delhi, 1998, pp. 925-30. 9. W. Kurz and D.J. Fisher: Fundamentals of Solidification, 2nd ed., Trans Tech Publications, Aedermannsdorf, Switzerland, 1992, pp. 133-36. 10. Z. Scheil: Metallkunde, 1942, vol. 34, p. 70. 11. V.R. Voller and C. Prakash: Int. J. Heat Mass Transfer, 1987, vol. 30, pp. 1709-19.
Reaction Synthesis, Microstructure, and Mechanical Properties of In Situ Composite NiAl-Al2O3-TiC D.T. JIANG, J.T. GUO, D.L. LIN, and C.X. SHI The NiAl intermetallic alloys have been recognized as promising candidates for high-temperature structural applications.[1,2] These alloys possess several attractive properties, including low density, high thermal conductivity, high melting point, high modulus, and excellent oxidation resistance. However, the use of single-phase NiAl as a structural material is limited because of its lack of ductility at room temperature and low creep resistance at high temperatures. Significant efforts have been made to enhance the mechanical properties of NiAl through grain refinement, micro- and D.T. JIANG, Postdoctoral Fellow, and D.L. LIN, Director, are with the Open Laboratory of Education Ministry of China for High Temperature Materials and Tests, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P.R. China. J.T. GUO, Director of Intermetallics Research Group, and C.X. SHI, Consultant for China National Natural Science Foundation Committee, are with the Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R. China. Manuscript submitted August 25, 1999. 1692—VOLUME 31A, JUNE 2000
macroalloying, as well as incorporating second-phase reinforcement.[3–6] The compound has also been made as a composite material containing a second phase such as boride, carbide, or oxide in the form of particulates, whiskers, or fibers. For instance, NiAl-TiB2,[7,8,9] NiAl-Al2O3,[10,11] and NiAl-AlN composites[12,13] have been extensively investigated to incorporate the high strength and stiffness of these ceramics into the matrix NiAl.
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