Properties of powders produced by electrical explosions of copper–nickel alloy wires

Kwon, Young-Soon; An, Vladimir; Ilyin, Alexander P.; Tikhonov, D.V.

doi:10.1016/j.matlet.2006.11.047

Cited by 39 publications

(23 citation statements)

References 1 publication

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“…Unless complete evaporation of the metal wire occurs due to not enough of a supply of energy, the wire was split into the Characteristics of Fe-Cr-Al Alloy Nanopowders Prepared by Electrical Wire Explosion Process under Liquid Mediametal vapors and the overheated metal droplets. 16,33) The overheated metal droplets formed by incomplete evaporation of the wire would be changed to submicro-, micrometer sized particles. On the other hand, if complete evaporation of the wire occurs during the EWE process, the content of these coarse particles significantly decreases and the content of nanometer sized particles due to metal vapor increases.…”

Section: Methodsmentioning

confidence: 99%

Characteristics of Fe-Cr-Al Alloy Nanopowders Prepared by Electrical Wire Explosion Process under Liquid Media

et al. 2011

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Fe-Cr-Al alloy nanopowders were successfully prepared by electrical wire explosion method in ethyl alcohol media. The formation of FeCr-Al alloy nanopowder was monitored by X-ray diffraction. The alloy powders have spherical shape and nanometer size. The alloy powders prepared by the electrical wire explosion method have main crystal structures of bcc Fe-Cr alloy. The geometric mean diameter and geometric standard deviation of an alloy powder formed from a wire with diameter of 0.1 mm were 10.2 nm and 1.62, respectively. However, the geometric mean diameter and geometric standard deviation of an alloy powder formed from a wire with diameter of 0.2 mm were 15.4 nm and 1.66, respectively. These values indicate that the particle size of the alloy powders prepared by the EWE method was increased with wire diameter. Fe, Cr, and Al components are uniformly dispersed inside the powder.

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Section: Methodsmentioning

confidence: 99%

Characteristics of Fe-Cr-Al Alloy Nanopowders Prepared by Electrical Wire Explosion Process under Liquid Media

et al. 2011

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“…In the EWE process, the wire is usually overheated and evaporated swiftly when a very strong pulse current with high current density passes through it, resulting in explosions that produce a shock wave, yielding metal powders. Unless complete evaporation of the metal wire occurs due to an excess supply of energy in the EWE process, the wire splits into metal vapors and overheated metal droplets [25]. The overheated metal droplets formed by incomplete evaporation of the wire form submicro-and micrometer sized particles.…”

Section: Synthesis Of Pt-fecr Alloy Nanoparticlesmentioning

confidence: 99%

Large-Scale Synthesis and CO Oxidation Study of FeCr Alloy Supported Pt Nanocatalyst by Electrical Wire Explosion Process

et al. 2012

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Platinum nanoparticles supported on FeCr alloy have been synthesized at a large-scale by sequential electrical explosion of FeCr alloy and Pt wires in ethanol. X-ray diffraction showed corresponding peaks of nonoxide phase Pt and FeCr alloy nanoparticles. Transmission electron microscopy showed uniform dispersion of Pt nanoparticles on the support with an average size of 2 nm and high thermal stability up to 600°C. These Pt-FeCr alloy nanoparticles were found to be active for CO oxidation with an activation energy of 15 kcal mol -1 and negligible deactivation. This work demonstrated the application of the electrical wire explosion process for synthesis of supported metal catalysts with high thermal stability and activity.

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“…[1][2][3][4] In pure single crystal titanium, the -Ti (HCP) is transformed to -Ti (BCC) at 882 C. Chromium is a beta stabilizer that depresses the transformation temperature and exhibits low alpha phase solubility (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…8) Significant variation in the composition distribution of atoms in the final products of intermetallic compounds has been reported in previous studies. [2][3][4] However, there are few reports on the chemical composition and microstructures of single alloy particles. In this study, the explosion products of Ti-Cr nanoparticles were examined with a FE-TEM, since a thorough investigation using a TEM could provide the evidence needed to interpret the reaction mechanism of the explosion.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Ti-Cr Nanoparticles Prepared by Electrical Wire Explosion

et al. 2011

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The reaction products of electrical wire explosion with 25 at% Cr-coated Ti wire were identified as -TiCr 2 , -Ti, (Ti,Cr) and -TiCr 2 based on the selected area electron diffraction patterns. There was a bimodal size distribution where Ti-Cr particles were 40-50 nm in size, and fine particles less than 10 nm were determined to be pure Ti or Cr. The Ti-Cr nanoparticles are not only a mixture of Ti-Cr phases but they are also heterogeneous themselves at a single particle level, due to the non-equilibrium effects of the EWE process. The very rapid collision and subsequent coalescence of Ti and Cr atom clusters are believed to have contributed to the formation of chemically segregated particles.

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Properties of powders produced by electrical explosions of copper–nickel alloy wires

Cited by 39 publications

References 1 publication

Characteristics of Fe-Cr-Al Alloy Nanopowders Prepared by Electrical Wire Explosion Process under Liquid Media

Characteristics of Fe-Cr-Al Alloy Nanopowders Prepared by Electrical Wire Explosion Process under Liquid Media

Large-Scale Synthesis and CO Oxidation Study of FeCr Alloy Supported Pt Nanocatalyst by Electrical Wire Explosion Process

Microstructure of Ti-Cr Nanoparticles Prepared by Electrical Wire Explosion

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