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Abstract <p>In this paper, we describe the CCDS2000 detonation system and demonstrate its capabilities for producing insulating and wear-resistant alumina coatings. The dielectric strength of such coatings is above 25 kV/mm at thicknesses in the range 50–300 μm. The resistivity of the coatings at a temperature of 20°C and relative humidity below 59% is ρ<sub>e</sub> &gt; 2.67 × 10<sup>13</sup> Ω cm. As humidity increases, ρ<sub>e</sub>&#xa0;drops sharply, by two to three orders of magnitude. The adhesion of the coatings to a steel substrate is up to 60–70 MPa, their microhardness is HV<sub>0.1</sub> = 1522–1655, and their porosity ranges from 0.35&#xa0;to&#xa0;1.00%. Our results demonstrate that, to obtain electrical insulation coatings, it is reasonable to use a C<sub>2</sub>H<sub>2</sub> + 2O<sub>2</sub> detonating mixture, and that optimal wear resistance parameters can be obtained with a 0.69C<sub>2</sub>H<sub>2</sub> + 0.53C<sub>3</sub>H<sub>6</sub> + 2.51O<sub>2</sub> mixture. Switching to the dual-fuel mixture ensures a fourfold increase in abrasion resistance and a 34% increase in erosion resistance.</p>

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Alumina Coatings Produced Using the CCDS2000 Detonation System

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • V. Yu. Ulianitsky,
  • I. S. Batraev,
  • D. K. Rybin,
  • A. A. Shtertser

摘要

Abstract

In this paper, we describe the CCDS2000 detonation system and demonstrate its capabilities for producing insulating and wear-resistant alumina coatings. The dielectric strength of such coatings is above 25 kV/mm at thicknesses in the range 50–300 μm. The resistivity of the coatings at a temperature of 20°C and relative humidity below 59% is ρe > 2.67 × 1013 Ω cm. As humidity increases, ρe drops sharply, by two to three orders of magnitude. The adhesion of the coatings to a steel substrate is up to 60–70 MPa, their microhardness is HV0.1 = 1522–1655, and their porosity ranges from 0.35 to 1.00%. Our results demonstrate that, to obtain electrical insulation coatings, it is reasonable to use a C2H2 + 2O2 detonating mixture, and that optimal wear resistance parameters can be obtained with a 0.69C2H2 + 0.53C3H6 + 2.51O2 mixture. Switching to the dual-fuel mixture ensures a fourfold increase in abrasion resistance and a 34% increase in erosion resistance.