بررسی استفاده از ترکیب بین فلزی Ni3Al برای ساخت کامپوزیتهای زمینه آلومینیومی
نویسنده
چکیده
کلیدواژهها
عنوان مقاله [English]
An Investigation of the Use of Ni3Al Intermetallic Compound for Fabrication of Al Matrix Composites
نویسنده [English]
- M. H. Enayati and M. Salehi
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.
کلیدواژهها [English]
- Al matrix composites
- Al-Ni3Al
- intermetallic compound
- Nanocrystalline
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