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<p>The composition, mass transfer behavior, structure and properties of electrospark coatings produced on chromium alloy VKh1-17A and titanium alloy VT20 using Cr<sub>2</sub>AlC and Ti<sub>2</sub>AlC electrodes were studied. It was found that electrospark deposition (ESD) with a&#xa0;Cr<sub>2</sub>AlC electrode forms MAX phases on both the chromium alloy and the titanium alloy. When a&#xa0;Ti<sub>2</sub>AlC electrode is used, the MAX phase in the coating is observed on the chromium alloy. Vacuum annealing at 800 °C for 1 h increases the MAX-phase content in the coatings. The coatings on the chromium alloy are characterized by hardness <i>H</i> = 20.3 GPa and elastic modulus <i>E</i> = 288 GPa when a&#xa0;Cr<sub>2</sub>AlC electrode is used, and by <i>H</i> = 24.8 GPa and <i>E</i> = 285 GPa when a&#xa0;Ti<sub>2</sub>AlC electrode is used. The coatings on the titanium alloy have <i>H</i> = 17.6 GPa and <i>E</i> = 271 GPa when a&#xa0;Cr<sub>2</sub>AlC electrode is used and <i>H</i> = 21.2 GPa and <i>E</i> = 267 GPa when a&#xa0;Ti<sub>2</sub>AlC electrode is used. The coatings are fully (100%) continuous, up to 20 µm thick, and exhibit low coefficients of friction (<i>K</i><sub>fr</sub> &lt; 0.25). The use of ESD and MAX-phase electrodes increases the hardness by more than a&#xa0;factor of 3.6, the wear resistance by more than a&#xa0;factor of&#xa0;20, and the oxidation resistance by more than a&#xa0;factor of&#xa0;1.4.</p>

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Production of wear-resistant antifriction coatings from MAX phases Cr2AlC and Ti2AlC on chromium alloy VKh1-17A and titanium alloy VT20

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Alexander E. Kudryashov,
  • Evgeniya I. Zamulaeva,
  • Samat K. Mukanov,
  • Mikhail I. Petrzhik,
  • Evgeniy A. Levashov

摘要

The composition, mass transfer behavior, structure and properties of electrospark coatings produced on chromium alloy VKh1-17A and titanium alloy VT20 using Cr2AlC and Ti2AlC electrodes were studied. It was found that electrospark deposition (ESD) with a Cr2AlC electrode forms MAX phases on both the chromium alloy and the titanium alloy. When a Ti2AlC electrode is used, the MAX phase in the coating is observed on the chromium alloy. Vacuum annealing at 800 °C for 1 h increases the MAX-phase content in the coatings. The coatings on the chromium alloy are characterized by hardness H = 20.3 GPa and elastic modulus E = 288 GPa when a Cr2AlC electrode is used, and by H = 24.8 GPa and E = 285 GPa when a Ti2AlC electrode is used. The coatings on the titanium alloy have H = 17.6 GPa and E = 271 GPa when a Cr2AlC electrode is used and H = 21.2 GPa and E = 267 GPa when a Ti2AlC electrode is used. The coatings are fully (100%) continuous, up to 20 µm thick, and exhibit low coefficients of friction (Kfr < 0.25). The use of ESD and MAX-phase electrodes increases the hardness by more than a factor of 3.6, the wear resistance by more than a factor of 20, and the oxidation resistance by more than a factor of 1.4.