No abstract

No abstract

Nano-sized Titanium nitride powders were synthesized by electrical explosion of Ti wire under nitrogen atmosphere ranging from 0.2 to 1.5 atm. Electron microscopy and X-ray diffraction studies revealed that the reaction products are cube-shaped single phase TiN nanoparticles. The lattice parameter of TiN nanoparticles increased with nitrogen pressure in the chamber. The nitrogen content of nanoparticles was estimated from their lattice parameter being comparable to the stoichiometric composition of TiN. Small amount of TiN 0:3 phase was formed when nitrogen pressure in the chamber was low.

We previously proposed a new method to synthesize nano-sized powders of various alloys and intermetallic compounds. The method consisted of electrical wire explosion of electrodeposted metal wires. In this study, the method was applied for Ti-Cr alloy. The overall composition of the Cr-coated Ti wire was about Ti-25 at% Cr. The explosion products consisted of equilibrium phases of -Ti and TiCr 2 phases along with meta-stable Ti-rich phase. The composition of phase estimated from its lattice parameter was Ti-13 at% Cr. The phase decomposed completely to -Ti and TiCr 2 phases during isothermal aging at 600 C for one day.

No abstract