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hardness measurements. Results showed that consolidated Al-Ni3Al samples included no significant porosity with a nearly uniform distribution of Ni3Al particles. Additionally, structural examinations showed that no significant reaction between Ni3Al and aluminum matrix occurred during sintering process. Al-Ni3Al composites exhibited a higher hardness value compared with pure aluminum sample prepared under identical conditions. The hardness value of Al-Ni3Al composites increased linearly as Ni3Al content increased. Keywords: Al matrix composites, Al-Ni3Al, Intermetallic compound, Nanocrystalline.

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12. Liu, C. T., and Pope, D. P., Intermetallic Compounds, Vol. 2, p. 17, John Wiley, New York, 2000.

13. Brandes, E. A., and Brook, G. B., Smithells Metals Reference Book, 7th ed., p. 14, Butterworth-Heinemann, Oxford, 1992.

14. Enayati, M. H., Sadeghia, Z, Salehi M., and Saidi A., “The Effect of Milling Parameters on The Synthesis of Ni3Al Intermetallic Compound by Mechanical Alloying,” Materials Science and Engineering A,Vol. 375-377, pp. 809-811, 2004.

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