DEVELOPMENT OF COMPLEX EQUIPMENT FOR PLASMA SPRAY CERAMIC COATINGS

Develop a set equipment for plasma forming ceramic coatings. The article presents characteristics and parameters of the developed complex equipment for formation of plasma ceramic coatings as well as results of its testing. Methods of research is based on studies of structural elements composite plasma coatings system ZrO₂ – Y₂O₃  obtained  using  developed complex equipment. One of the most effective ways to protect the components from high temperature corrosion and oxidation is formation on the surface of plasma thermal barrier coatings. For thermal barrier coating has very strict requirements: сharacterized by a smooth change of physico-mechanical properties (porosity, microhardness, elastic modulus) in the cross section of the metal substrate to the outer ceramic layer; to withstand multiple cycles of thermal cycling from room temperature to the operating temperature; to maintain gastightness under operating conditions and thus ensure a sufficiently high level of adhesive strength. For realization of new technological schemes applying thermal barrier coatings with high operational characteristics was developed, patented and manufactured a range of new equipment. The experiments show that authors developed PBG-1 plasmatron and powder feeder PPBG-04 have at least 2–3 times the service life during the deposition of ceramic materials compared to the standard equipment of the company "Plasma-Technik", by changing the structure of the cathode-anode plasma torch assembly and construction of the delivery unit of the feeder to facilitate the uniform supply of the powder into the plasma jet and the best of his penetration. The result is better plasma coatings with improved operational characteristics: adhesion strength is increased to 1.3–2 times, material utilization in 1.5–1.6 times microhardness 1.2–1.4 times the porosity is reduced by 2–2.5 times.

1. Sterns K. A. (1997) Thermal barrier coatings. Aerokosmicheskaya Tekhnika [Aerospace Equipment], (10), 144–164 (in Russian).

2. Duane L Ruckle (1980) Plasma-Sprayed Ceramic Thermal Barrier Coatings for Turbine Vane Platforms. Thin Solid Films, 73, (2), 455–461. doi:10.1016/0040-6090(80)90514-3

3. Stecura S. (1987) New ZrO2 – YbO Plasma-Sprayed Coatings for Thermal Barrier Applications. Thin Solid Films, 150 (1), 15–40. doi:10.1016/0040-6090(87)90305-1

4. Fairbanks S. W., Hecht R. J. (1987) The Durability and Performance of Coatings in Gas Turbine and Diesel Engines. Materials Science and Enginering, 88, 321–330. doi:10.1016/0025-5416(87)90101-7

5. Suhr D. S. (1984) Microstructure and Durability of Zirconia Thermal Barrier Coatings. Thesis (Ph. D.) 5756909. Cleveland, OH (USA).Case Western Reserve Univ.

6. Miller R. A., Christopher C. (1984) Performance of Thermal Barrier Coatings in High Hear Flues. Thin Solid Films, 119 (2), 195–202. doi:10.1016/0040-6090(84)90534-0

7. Padovan J., Chung B. T. F., McDonald G. E., Hendricks R. C. (1987) Therinomechanical Behaviour of Plasma-Sprayed ZrO2 – Y2O3 Coatings Influenced by Plasticity Creep and Oxidation. 11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings. John Wiley & Sons, 8 (7/8), 572-582. DOI: 10.1002/9780470320402.ch10

8. Okovity V. A., Panteleenko F. I., Devoino O. G., Okovity V. V., Sobolevsky S. V., Shevtsov A. I. (2011) Creation of gradient plasma-sprayed coatings on basis of zirconium dioxide stabilized with ytterbium dioxide. Vestnik BNTU [Bulletin of the Belarusian National Technical University], (6), 5–8 (in Russian).

9. Okovityi V. V., Il'iushchenko A. F., Devoino O. G., Shevtsov A. I., Sobolevskii S. B. (2012) Composite Powder on the Basis of Zirconium Dioxide Partially Stabilized with Ytterbium Oxide. Poroshkovaia metallurgiia. Respublikanskii mezhvedomstvennyi sbornik [Powder Metallurgy. Republican interdepartmental collection]. Minsk, Vysheishaia shkola Publ., Is. 35, 80–85 (in Russian).

10. Okovity V. A., Panteleenko F., Panteleenko A., Okovity V. V., Kulak A., Ulasevich S. (2013) Th? process of composite powder production ?n the base hydroxyapatite and zirconium dioxide for plasma bioceramic coatings. Nauka i Tekhnika [Science & Technique], (1), 31–38 (in Russian).

11. Okovityi V. A., Il'iushchenko A. F., Devoino O. G., Shevtsov A. I. (2013) Creation of Gradient Plasma Coatings on the Basis on Zirconium Dioxide Partially Stabilized with Cerium Oxide. Poroshkovaia metallurgiia. Respublikanskii mezhvedomstvennyi sbornik [Powder Metallurgy. Republican interdepartmental collection]. Minsk, Vysheishaia shkola Publ., Is. 36, 331–337 (in Russian).

12. Devoino O. G., Okovity V. V. (2013) Composite Powder on the Basis of Zirconium Dioxide Partially Stabilized with Cerium Oxide. Nauka i Tekhnika [Science & Technique], (6), 3–8 (in Russian).

13. Devoino O. G., Okovity V. V. (2015) Plasma thermal barrier coatings based on zirconium dioxide with high thermal stability. Nauka i Tekhnika [Science and Technique], (1), 35–39 (in Russian).

14. Okovity V. A., Shevtsov A. I., Devoino O. G., Okovity V. V. (2010) Plasmatron for coating deposition. Patent 14906 Republic of Belarus (in Russian).

15. Okovity V. A., Ilyushchenko A. F., Shevtsov A. I., Astashinsky V. M., Okovity V. V. (2013) Powder Feeder for Coating Deposition. Patent. 16809 Republic of Belarus (in Russian).

16. Okovity V. V. (2013) Plasmatron for Coating Deposition on Internal Surfaces of Parts: Utility Model Patent 8930 Republic of Belarus (in Russian).

17. Okovity V. V. (2013) Plasmatron for Coating Deposition. Utility Model Patent 9423 Republic of Belarus (in Russian).

18. Powder Feeder for Coating Deposition. Utility Model Patent 9665 Republic of Belarus (in Russian).

19. Okovity V. V. (2014) Plasmatron for Coating Deposition: Utility Model Patent 10210 Republic of Belarus (in Russian).