Ti-Cr Nanoparticles Prepared by Electrical Wire Explosion

Abstract

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.

Preparation of Titanium-Chromium Nitride by Gas Nitriding of the Explosion Products of Cr-Coated Ti Wire

“…10) In this study we heated the explosion products, that is, the mixture of -Ti, TiCr 2 and Ti-rich phases at various temperatures under flowing nitrogen gas to produce single phase (Ti,Cr)N particles. Figure 1 shows the X-ray diffraction patterns of the nitriding products at various temperatures.…”

“…Recently, we have successfully synthesized nanoparticles of alloys, intermetallics and nitrides by the electrical wire explosion (EWE) process. [7][8][9][10][11] In our previous work, we produced the mixture of -Ti and TiCr 2 particles along with meta-stable Ti-rich phase by exploding a Cr-coated Ti wire in argon. 10) Later on, we produced the mixture of TiN, Cr 2 N, and a few nanometer-sized fine particles, which are presumably (Ti,Cr)N, by exploding a Cr-coated Ti wire in nitrogen.…”

“…[7][8][9][10][11] In our previous work, we produced the mixture of -Ti and TiCr 2 particles along with meta-stable Ti-rich phase by exploding a Cr-coated Ti wire in argon. 10) Later on, we produced the mixture of TiN, Cr 2 N, and a few nanometer-sized fine particles, which are presumably (Ti,Cr)N, by exploding a Cr-coated Ti wire in nitrogen. 12) In this study, we aimed to synthesize (Ti,Cr)N nanoparticles from two different explosion products obtained in our previous work of Refs.…”

Electrical Wire Explosion of Cr-Coated Ti Wire in N<SUB>2</SUB> Gas

“…29) We also conducted explosion experiments in Ar gas using the Cr-coated Ti wire which is the same as the one used in this study. 28) We produced -Ti and TiCr 2 nanoparticles which are the equilibrium phases of Ti-Cr alloy of the corresponding composition. However, neither of the phases was identified in this study when it was exploded in N 2 gas.…”

“…The only study on this subject was conducted using a rather complicated precipitation method in which Cr 2 O 3 and TiO 2 nanocomposite powder were utilized. 24) We have been demonstrated that electrical wire explosion (EWE) would be a plausible method to synthesize various alloys and intermetallic nanoparticles [25][26][27][28] and also nitride. 29) In this study, we elaborated further to synthesize (Ti,Cr)N nanoparticles by this method.…”