Ion-plasma spraying and electron-beam treatment of composite cr-al-co-zro2-y2 o3 coating on the surface of ni-cr alloy

Almira Zhilkashinova, Madi Abilev, Alexander Pavlov, Nadezhda Prokhorenkova, Mazhyn Skakov, Alexander Gradoboev, Assel Zhilkashinova

Research output: Contribution to journalArticlepeer-review

Abstract

The blades of modern gas turbine engines are complex structures made of heat-resistant nickel alloys with a complex system of internal cavities. The article describes a method of strengthen-ing samples of a heat-resistant Ni-Cr alloy by applying a composite coating (Cr-Al-Co + ZrO2-Y2 O3 ). The alloy prototypes were fabricated by vacuum melting. An ion-plasma technology of a two-layer coating with an inner metal and an outer ceramic layer on the prepared surface of the heat-resistant alloy matrix was developed. The morphology and structure of the alloy prototypes and the investigated composite coating were studied by scanning electron spectroscopy. The total thickness of the two-layer wear-resistant coating was 17–18 µm. The thickness of the inner layer (Cr/Al/Co) is 10–11 µm and the thickness of the outer ceramic coating (ZrO2-Y2 O3 ) is 6–7 µm. To improve the operational characteristics of the material, an electron-beam surface treatment was proposed. The research results showed a sevenfold increase in surface resistance compared with the initial state.

Original languageEnglish
Article number321
JournalCoatings
Volume11
Issue number3
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Composite Cr-Al-Co + ZrO-Y O coating
  • Electron beam treatment
  • Ion-plasma spraying
  • Ni-Cr alloy
  • Performance characteristics

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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