Volume 25, Issue 2 (1-2007)
2007, 25(2): 183-190 |
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M. H. Enayati and M. Salehi. An Investigation of the Use of Ni3Al Intermetallic Compound for Fabrication of Al Matrix Composites. Journal of Advanced Materials in Engineering (Esteghlal) 2007; 25 (2) :183-190
URL: http://jame.iut.ac.ir/article-1-399-en.html
URL: http://jame.iut.ac.ir/article-1-399-en.html
Abstract: (7992 Views)
Fabrication and characterization of aluminum matrix composites containing different volume fractions of Ni3Al powder (5-40 Vol%) were investigated. Ni3Al powder was produced by mechanical alloying of elemental nickel and aluminum powder mixture. Al-Ni3Al composite parts were prepared using a powder metallurgy route involving two stages Al and Ni3Al powder mixtures were first compacted under 500MPa and then hot-pressed under 250MPa at 420 oC for 10min. The microstructure and hardness of consolidated parts were investigated by x-ray diffractometery, optical and scanning electron microscopy and
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.
