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Registration Number

0222U004604, 0117U000258 , R & D reports

Title

Designing of oxide materials based on ZrO2, doped with the oxides of gadolinium, lanthanum, yttrium, cerium for a new generation of thermal barrier coatings on the gas-turbine engine parts.

Head

Dudnik Olena V., Доктор хімічних наук

Registration Date

19-09-2022

Organization

Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine

Description

 Objective of research: creation of physico-chemical bases of microstructural design and development of high-strength heat-protective coatings based on ZrO2, complex doped with yttrium oxides and lanthanides. For the first time, concentrates of oxides of rare earth elements (REE) of natural origin of cerium and yttrium subgroups were used to create a ceramic layer based on ZrO2 thermal barriers and electron beam evaporation-condensation coatings (EB-PVD). The analysis of modern developments in the field of thermobarrier coatings (TBP) and the prospects of high-entropy and complex composite materials based on ZrO2 doped with a mixture of REE oxides for microstructural design of TBP ceramic layer. The nature of the interaction between lanthanide oxides in each subgroup is analyzed on the basis of known phase diagrams and theoretical Ln2O3 - LnI2O3 and Ln2O3 - Y2O3 phase diagrams are constructed. The technology basics of obtaining targets (d = 68.5 ± 0.5 mm, h = 55 ± 5 mm) from powders based on ZrO2 have been developed and the optimal parameters for depositing the modern coatings by EB-PVD method have been determined. The structure and phase composition of the inner heat-resistant TBP layer of NiCrAlY alloy and the mode of formation of the diffusion barrier layer at the boundary of the inner metal heat-resistant layer / outer ceramic layer of the two-layer thermobarrier coating were studied. For the first time, two-layer metal/ceramics thermobarrier coatings, deposited in one technological cycle on the first stage blades of the ZMKB "Progress" turbine by EB-PVD method, were obtained and studied. The peculiarities of the laminar microstructure formation of the modern coatings depending on their composition are determined. It was found that the microhardness of the modern coatings is lower than the standard, but their thermocycling durability is 16% higher than the standard coating system ZrO2−Y2O3.

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Glabay Marina Sergiivna
Goncharenko Maria R.
Hrechanіuk Mykola I.
Lakiza Sergiyergij Mykolajovych
Makudera Alina O.
Marek Iryna O.
Red'ko Victor P.
Ruban Konstyantin Oleksiiovich
Smyrnova-Zamkova Mariia Yu.
Tyschenko Yana Sergiivna
Khomenko Olena V.