The formation of pyrochlores during plasma spraying of REO and zirconia oxides powder mixture

• Autorzy: Kubaszek Tadeusz , Nowak Wojciech J. , Pędrak Paweł , Góral Marek , Rybus Kinga , Ślemp Karol

Identyfikatory

DOI

10.30464/jmee.2019.3.2.141

• Języki publikacji: EN

Abstrakty

EN

The pyrochlores are the promising low-thermal conductive materials for Thermal Barrier Coatings applications. In present work the concept of pyrochlore formation during APS spraying of ZrO2 and ReO was analyzed. The specially prepared agglomerated mixtures of ZrO2 with Nd2O3, Yb2O3, Er2O3 and Gd2O3 oxides were plasma sprayed using A60 plasma torch on NiCoCrAlY-type bond coat. The influence of plasma gasses composition on coatings’ microstructure was investigated. The results of XRD phase analysis proved formation of pyrochlores from Gd2O3 +ZrO2 and Nd2O3+ZrO2 mixtures. The formation of Er4O12Zr3 from Er2O3+ ZrO2 mixture as well as Zr3Yb4 from Yb2O3+ ZrO2 powder was detected. The presence of pure rare earth oxides (REO) and zirconia oxides was observed in all types of sprayed coatings. The microstructural assessment showed differences in porosity and thickness of obtained ceramic coatings depending of type of REO oxides. The analysis of results showed that it is possible to obtain pyrochlore ceramic coatings from pure oxides mixture. The plasma energy was not efficient for full formation of pyrochlores, therefore the presence of pure oxides was observed.

Słowa kluczowe

EN

thermal barrier coatings; plasma spraying; ceramic coating; rare earth oxides; pyrochlores; porosity

PL

powłokowe bariery cieplne; natryskiwanie plazmowe; powłoki ceramiczne; tlenki metali ziem rzadkich; pirochlory; porowatość

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2019
• Tom: Vol. 3, No 2
• Strony: 141--147
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Kubaszek Tadeusz

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautic, Department of Materials Science

autor

Nowak Wojciech J.

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautic, Department of Materials Science

autor

Pędrak Paweł

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautic, Department of Materials Science

autor

Góral Marek

• Rzeszow University of Technology, Faculty of Mechanical Engineering and Aeronautic, Department of Materials Science, Powstanców Warszawy 12, 35-959 Rzeszów, Poland

autor

Rybus Kinga

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautic, Department of Materials Science

autor

Ślemp Karol

• Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautic, Department of Materials Science

Bibliografia

• 1. Drapier, J.M. Progress in advanced directionally solidified and eutectic high temperature alloys, Proceedings of Liege Conference, 1978
• 2. Nicoll, A.R., Gruner, H., Prince R., Wuest G., (1995) Thermal spray coatings for high temperature protection, Surface engineering, Issue 1. vol. 1, 59-71
• 3. Pawlowski L., (2013), Strategic oxides for thermal spraying: problems of availability and evolution of prices, Surface and Coatings Technology, vol. 220, 14-19
• 4. Clarke D.R., Phillpot S.R., (2005) Thermal Barrier Coating Materials, Materials Today, volume 8, issue 6, 22-29
• 5. Vassen R., Jarligo M.O., Steinke T., Mack D.E., Strover D., (2010), Overview on advanced thermal barrier coatings, Surface and Coatings Technology, vol. 205, 938-942
• 6. Moskal. G., (2011), Microstructure characterization of TBC layers of Gd2Zr2O7 type, Defect and Diffusion Forum, vol. 312-315, 439-444
• 7. Moskal, G., Swadźba, L., Hetmańczyk, M., Witala, B., Mendala, B., Mendala, J., Sosnowy, P., (2012) Characterisation of the microstructure and thermal properties of Nd2Zr2O7 and Ndassis2Zr2O7/YSZ thermal barrier coatings, Journal of the European Ceramic Society, vol. 32, issue 9, 2035-2042
• 8. Jucha, S., Moskal, G., Mikuśkiewicz, M., (2017), Morphology and durability of Sm2Zr2O7+8YSZ TBC systems during oxidation test at temperature 1100°C, Proceedings of the International Thermal Spray Conference, vol. 2, 917-922
• 9. Jucha, S. Moskal, G., Mikuśkiewicz, M., (2016) Synthesis and characterization of thermal properties of type Eu2O3-ZrO2 sinters, Archives of Metallurgy and Materials, vol. 61 issue 2B, 1121-1128
• 10. Moskal, G., Iwaniak, A., Rozmysłowska-Grund, A. (2011), Characterization of thermal properties of microsized ceramic powders for APS deposition of ceramic layers, Key Engineering Materials, vol. 484, 152-157

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).