Fabrication of alloy nanopowders by the electrical explosion of electrodeposited wires

Kim, Wonbaek; Park, Je-Shin; Suh, Chang–Yul; Chang, Hyunju; Lee, Jae-chun

doi:10.1016/j.matlet.2007.01.106

Cited by 26 publications

(10 citation statements)

References 10 publications

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“…In this work, alloy nanoparticles were fabricated by the electrical explosion of wires (EEW) method, which is a process of explosive destruction of a metal wire under the action of high density current. It has been successfully used to produce various pure metal and metal oxide particles such as Al, Fe, Ni, Si and Fe2O3 [20][21][22][23][24], as well as a few alloy nanoparticles (i.e., Al-Cu, Al-Ni) [25]. For alloy particles, coated metal wires were generally used where one metal component was electrodeposited onto the surface of another metal wire and EEW was subsequently applied [25].…”

Section: Introductionmentioning

confidence: 99%

Thermal-Chemical Characteristics of Al–Cu Alloy Nanoparticles

et al. 2015

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This work investigated the oxidation, ignition and thermal reactivity of alloy nanoparticles of aluminum and copper (nAlCu) using simultaneous thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) method. The microstructure of the particles was characterized with scanning electron microscope (SEM) and transmission electron microscope (TEM), and the elemental composition of the particles before and after the oxidation was investigated with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).The particles were heated from room temperature to 1200 o C under different heating rates from 2 to 30 K/min in the presence of air. The complete oxidation process of the nAlCu was characterized by two exothermic and two endothermic reactions, and the reaction paths up to 1200 o C were proposed. An early ignition of nAlCu, in the temperature around 565 o C, was found at heating rates ≥ 8 K/min. The eutectic melting temperature of nAlCu was identified at ~ 546 o C, which played a critical role in the early ignition. The comparison of the reactivity with that of pure Al nanoparticles showed that the nAlCu was more reactive through alloying.

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Section: Introductionmentioning

confidence: 99%

Thermal-Chemical Characteristics of Al–Cu Alloy Nanoparticles

et al. 2015

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“…The detailed procedure for the continuous electrodeposition set-up is described in our previous papers. 25,26) The diameter of the Cr-coated Ti wire was 0.320 mm which gives the average composition of about 25 at% Cr. The Cr-plating solution consisted of 2.47 mol/L of chromic trioxide and 0.03 mol/L of sulfuric acid.…”

Section: Methodsmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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Cr-coated Ti wire was electrically exploded in N 2 gas. The diameter of Ti wire was 0.289 mm and the thickness of Cr coating was 0.033 mm, which corresponds to the average composition of about 25 at% Cr. X-ray diffraction and FE-TEM study revealed that the explosion products consisted of cube-shaped TiN, sphere-shaped Cr 2 N, and clusters of extremely fine particles. The average particle size of TiN and Cr 2 N was about 35 and 38 nanometers, respectively. The size of the fine particles was small as a few nanometers and clustered heavily. Therefore, it was not possible to examine individually. The particles contained about 28 at% Cr. In some part of the high resolution TEM image, cubic structure could be recognized. The lattice parameter of the particles calculated assuming cubic structure was smaller than TiN and larger than CrN. As a result, it was concluded that the fine particles are (Ti,Cr)N.

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2011

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Titanium-chromium nitride nanopowders were prepared by the electrical explosion of the Cr-coated Ti wires in argon and nitrogen gases and subsequent nitriding treatments. The explosion product of the Cr-coated Ti wire in argon gas consisted of -Ti, TiCr 2 and Ti-rich phases. They transformed into single phase (Ti,Cr)N by the nitriding treatment at 1100 C. On the other hand, the explosion product of Cr-coated Ti wire in nitrogen gas consisted of TiN, Cr 2 N, and a few nanometer-sized (Ti,Cr)N particles. The particles transformed into the mixture of TiN and (Ti,Cr)N by the nitriding treatment at 1100 C. In this case, the pre-existing TiN in the explosion product was stable during nitriding and remained intact to coexist with newly-formed (Ti,Cr)N. The (Ti,Cr)N particles prepared by nitriding of the explosion product of Cr-coated Ti wire in nitrogen gas had 34.21 at% Ti, which was somewhat lower than 41.27 at% Ti of the (Ti,Cr)N produced by nitriding of the explosion product of Cr-coated Ti wire in argon gas. This is probably because high thermal stability of the pre-existing TiN in the explosion product of Crcoated Ti wire in nitrogen gas creates a local titanium deficiency in the formation of (Ti,Cr)N particles.

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Fabrication of alloy nanopowders by the electrical explosion of electrodeposited wires

Cited by 26 publications

References 10 publications

Thermal-Chemical Characteristics of Al–Cu Alloy Nanoparticles

Thermal-Chemical Characteristics of Al–Cu Alloy Nanoparticles

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

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

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