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<p>For the formation of nanodispersed powder, it is necessary to ensure a high hardening rate. The investigations are devoted to the study of the magnetic field′s influence on the dispersity of the powder formed in the cooling of a heterogeneous plasma.</p><p>The paper provides the results of investigating nanoparticles formed in a constant magnetic field. Metals were evaporated using a low-voltage arc (Fe + C, 10 mT), a high voltage arc (Cu + SiO<sub>2</sub>, 15 mT), laser ablation (Ti, 80 mT). The powder obtained in a low-voltage arc was studied using an XRD-7000S X-ray diffractometer. The morphology and the chemical composition of these nanoparticles were considered using a Tescan Vega II LMU electron microscope. The powders obtained from a high-voltage arc were analyzed using a JEOL JSM-7500FA electron microscope. The dispersity of the powder formed in laser ablation was determined on a Shimadzu SALD-7101 diffractometer.</p><p>Due to the difference in condensation temperatures in the mixtures of Ar, O<sub>2</sub>, N<sub>2</sub>, C, and Fe or Ar, O<sub>2</sub>, N<sub>2</sub>, Cu, and SiO<sub>2</sub>, two-layer microparticles are formed. It has been established that the powder of ferromagnetic or nonmagnetic substances formed in the magnetic field from plasma has a larger modal size and a smaller range of dimensions.</p>

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Effect of a Weak Constant Magnetic Field on Phase Transition

  • 期刊论文

  • 发表日期：

    2025年11月29日

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  • V. F. Myshkin,
  • V. A. Khan,
  • D. L. Gamov,
  • I. N. Shevchenko,
  • A. A. Orlov

摘要

For the formation of nanodispersed powder, it is necessary to ensure a high hardening rate. The investigations are devoted to the study of the magnetic field′s influence on the dispersity of the powder formed in the cooling of a heterogeneous plasma.

The paper provides the results of investigating nanoparticles formed in a constant magnetic field. Metals were evaporated using a low-voltage arc (Fe + C, 10 mT), a high voltage arc (Cu + SiO2, 15 mT), laser ablation (Ti, 80 mT). The powder obtained in a low-voltage arc was studied using an XRD-7000S X-ray diffractometer. The morphology and the chemical composition of these nanoparticles were considered using a Tescan Vega II LMU electron microscope. The powders obtained from a high-voltage arc were analyzed using a JEOL JSM-7500FA electron microscope. The dispersity of the powder formed in laser ablation was determined on a Shimadzu SALD-7101 diffractometer.

Due to the difference in condensation temperatures in the mixtures of Ar, O2, N2, C, and Fe or Ar, O2, N2, Cu, and SiO2, two-layer microparticles are formed. It has been established that the powder of ferromagnetic or nonmagnetic substances formed in the magnetic field from plasma has a larger modal size and a smaller range of dimensions.