Abstract
An experimental investigation is reported on a small patch production and fine-grained nano-structured γ-TiAl alloys particles by physical vapor-phase method. The γ-TiAl alloys nanoparticles which including γ-TiAl and α2-Ti3Al are synthesized by the flow-levitation technology equipped with the improved auxiliaries for double metal wires supplied system. The morphology, crystallite size, crystal structure and chemical composition of γ-TiAl and α2-Ti3Al nanoparticles are characterized by transmission electron microscopy, X-ray diffraction and energy disperse spectroscopy. The mainly results show that the morphologies of γ-TiAl nanoparticles are approximately spherical and the dispersion is homogeneous. The average size of the obtained nanoparticles can be 50 nm or 5 nm in diameter in the present experiment. The phase structured for γ-TiAl and α2-Ti3Al alloy are adjusted by the rate of Ti and Al feeding metal wires. A good yield which is better than 2 g/h is obtained for the γ-TiAl alloys nanoparticles. Several bulk γ-TiAl alloys nano-materials are compacted in high-strength die at room temperature.
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