Research of a heat-resistant intermetallic underlayer for the heat-shielding coating of gas turbine engine turbine blades

Abstract

The paper presents the results of research of the structure as well as physical and mechanical properties of a heat-resistant intermetallic coating of a “Ni-Co-Cr-Al-Y” system produced by the method of high-energy plasma powder spraying and used as a substrate in forming a heat-shielding zirconium dioxide coating. A coating is produced with an intermetallic phase composition (b-NiAl+ g’-Ni3Al) and spheroidal grain microstructure. The density of the coating is r=8200 kg/m 3, the microhardness is Нm=7,85 GPa and the roughness is 5mkm. According to the results of testing the heat shielding of the wall of a turbine blade made of the ЖС6Ф alloy with the help of a heat-shielding ZrO2 coating with a “Ni-Co-CR-Al-Y” substrate the metal temperature reduction amounted to 398 K. The coating is intended for the protection of the working surface of various-application gas turbine engine turbine blades against high-temperature gas corrosion in the form of a substrate for the heat-shielding zirconium dioxide coating, and also as an independent heat-shielding coating. The plasma heat-shielding coating for the “Ni-Co-CR-Al-Y” system has been tested as a substrate for a heat-shielding coating of zirconium dioxide with a view to extending the service life of turbine blades (made of a heat-resistant ЖС6Ф alloy) of the NK series gas turbine engine turbines.

About the authors

Yu. P. Tarasenko

Institute of Mechanical Engineering Problems of the Russian Academy of Sciences

Author for correspondence.
Email: npktribonika@yandex.ru

Candidate of Science (Physics and Mathematics)

Head of laboratory

Russian Federation

I. N. Tsareva

Institute of Mechanical Engineering Problems of the Russian Academy of Sciences

Email: npktribonika@yandex.ru

Candidate of Science (Physics and Mathematics)

Senior Researcher

Russian Federation

O. B. Berdnik

The Nizhniy Novgorod branch of Establishment of the Russian Academy of Sciences Institute mechanical engineering A.A.Blagonravova's name of the Russian Academy of Sciences Joint-Stock Company Research-and-production Center "Tribonika", Nizhni Novgorod

Email: npktribonika@yandex.ru

Candidate of Science (Engineering)

Senior Researcher

Russian Federation

Ya. A. Fel

Institute of Mechanical Engineering Problems of the Russian Academy of Sciences

Email: npktribonika@yandex.ru

Candidate of Science (Physics and Mathematics)

Senior Researcher

Russian Federation

L. A. Krivina

Institute of Mechanical Engineering Problems of the Russian Academy of Sciences

Email: npktribonika@yandex.ru

Research associate

Russian Federation

References

  1. Baldayev L.Kh. Renovatsiya i uprochnenie detaley mashin metodami gazotermicheskogo napyleniya [Renovation and strengthening of machine parts using methods of gasthermal spraying]. Moscow: KKhT Publ., 2004. 134 p.
  2. Tarasenko Yu.P., Berdnik O.B., Tsareva I.N., Fel Ya.A. Increasing reliability and resource of turbine blades of gas-pumping units // Sbornik trudov ХХ yubileynoy konferentsii «Problemy mashinovedeniya». Moscow: IMASh RAN, 2008. P. 528-531. (In Russ.)
  3. Tarasenko Yu.P., Tsareva I.N., Fel Ya.A., Berdnik O.B. Lopatka turbiny gazoturbinnogo dvigatelya s zharostoykim pokrytiem [A gas turbine engine turbine blade with
  4. heat-resistant coating]. Patent RF, No. 88389, 2009 (Publ. 06.07.2009).
  5. Bugs M. F., Anshakov A.S., Zasypkin I.M. Elektrodugovye generatory s mezhelektrodnymi vstavkami [Arc generators with interelectrode inserts]. Novosibirsk: Nauka Publ., 1981. 219 p.
  6. Kolobov Yu.R., Kablov E.N., Kozlov E.V. et. all. Struktura i svoystva intermetallidnykh materialov s nanofaznym uprochneniem [Structure and properties of intermetallic materials with nanophase strengthening]. Moscow: MISiS Publ., 2008. 327 p.

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