Nanoalloying of clusters of immiscible metals and the formation of bimetallic nanoparticles in the conditions of non-synchronous explosion of two wires

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Abstract

The work researches the influence of metal mixing enthalpy on spontaneous nanoalloying of coagulated clusters formed when intertwined Fe/Ag, Ni/Ag, Nb/Сu and Pb/Сu wires with equiatomic composition are exploded. The analysis of temporal dependencies of currents and voltages has shown that the intervals between the successive explosions of Fe/Ag, Ni/Ag, Nb/Сu and Pb/Сu wires are 0.38, 0.26, 0.43 and 0.4 μs, respectively. This explains their asynchronous destruction. It has been found that when wires are exploded, bimetallic Janus and core-shell nanoparticles are formed. The obtained data makes it possible to conclude that when wires explode non-synchronously, clusters coagulate and atoms of metals subsequently intermix. The results of the research demonstrate that the explosion of two wires made of metals with positive mixing enthalpy (from 8 to 116 kJ/g) is a process that can be used to obtain bimetallic nanoparticles with complex structures.

Original languageEnglish
Pages (from-to)855-862
Number of pages8
JournalPowder Technology
Volume360
DOIs
Publication statusPublished - 15 Jan 2020

Keywords

  • Bimetallic nanoparticles
  • Explosion of two wires
  • Immiscible metals
  • Metal mixing enthalpy
  • Nanoalloying of clusters

ASJC Scopus subject areas

  • Chemical Engineering(all)

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