Ion-Plasma Spraying and Electron-Beam Treatment of Composite Cr-Al-Co-ZrO2-Y2O3 Coating on the Surface of Ni-Cr Alloy

Coatings

Alexander Gradoboev¹  Mazhyn Skakov²  Assel Zhilkashinova²  Madi Abilev²  Almira Zhilkashinova²  Alexander Pavlov²  Nadezhda Prokhorenkova³ 

[1] Department of Experimental Physics, National Research Tomsk Polytechnic University, 2 Lenin Avenue, 634050 Tomsk, Russia;National Research Laboratory for Collective Use, Sarsen Amanzholov East Kazakhstan University, 34 Tridtsatoy Gvardeiskoy Divizii Street, Ust-Kamenogorsk 070002, Kazakhstan;School of Traditional and Alternative Energy, D. Serikbayev East Kazakhstan Technical University, 69 Protozanov Street, Ust-Kamenogorsk 070004, Kazakhstan;

关键词: Ni-Cr alloy;    composite Cr-Al-Co + ZrO₂-Y₂O₃ coating;    ion-plasma spraying;    electron beam treatment;    performance characteristics;   

DOI  :  10.3390/coatings11030321

来源: DOAJ

【 摘 要 】

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 strengthening samples of a heat-resistant Ni-Cr alloy by applying a composite coating (Cr-Al-Co + ZrO₂-Y₂O₃). 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-Y₂O₃) 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.

【 授权许可】

Unknown