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2019 №09 (03) DOI of Article
10.15407/tpwj2019.09.04 		2019 №09 (05)

The Paton Welding Journal 2019 №09


The Paton Welding Journal, 2019, #9, 23-29 pages
 
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #9, 2019 (October)
Pages 23-29

Heat-resistant thermal sprayed coatings based on FeAlCr intermetallide with CeO2 additives

Yu.S. Borisov1, A.L. Borisova1, T.V. Tsymbalista1, N.I. Kaporik1 and M.A. Vasilkovskaya2


1E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2Frantsevich Institute for Problems of Materials Science 3 Krzhizhanovskogo Str., 03680, Kyiv, Ukraine. E-mail: kiparis-gpk@ukr.net

The paper presents the results of studying the heat resistance of coatings, produced by the methods of plasma (PS) and high-velocity oxy-fuel spraying (HVOF), using composite powder based on FeAlCr with addition of 2 wt.% CeO2, as well as by the methods of electric arc metallization (EM) and activated electric arc metallization (AM) with using of flux-cored wire of the following composition: 98(82Fe + 16Al + 2Cr) + 2CeO2 (wt.%). Composite powder was prepared by the method of mechanochemical synthesis (MS) by treating a mixture of powder components in a planetary-type mill. Heat resistance testing was performed in air at 800, 900 and 1000 °C for 7 h by weight method. Coating structure after heat resistance testing was studied with application of metallographic and X-ray structural analysis (XRD). It is found that during testing of coatings produced by PS and HVOF methods the delamination phenomenon is observed, whereas coatings produced by AM and EM methods preserve a tight bond strength with the substrate. Obtained kinetic curves of heat resistance showed that in the entire time interval of testing at 800–1000 °C the oxidation mechanism follows the parabolic law. The data of kinetic dependencies were used to plot the parametric heat resistance diagrams, allowing evaluation of fatigue life time of the studied protective coatings in the temperature range of 800–1000 °C. The highest heat resistance is found in FeAlCrCeO2 coatings produced by AM and EM methods with using of flux-cored wire. At 1000 °C it exceeds the resistance of steel 45 by 23-26 times, and corresponds to heat resistance of 08Cr17Ti steel. 12 Ref., 2 Tables, 8 Figures.
Keywords: thermal spraying, electric arc spraying, iron-aluminium intermetallides, mechanochemical synthesis, composite powder, flux-cored wire, parametric heat resistance diagram, FeAlCr–CeO2 system

 
Received: 12.06.19
Published: 17.10.19
 
 

References

1. Deevi, S.C., Sikka, V.K. (1996) Nickel and iron aluminides: An overview on properties, processing, and applications. Intermetallics, 4(5), 357-375. https://doi.org/10.1016/0966-9795(95)00056-9
2. Kai, W., Lee, S.H., Chiang, D.L.,Chu, J.P. (1998) The hightemperature corrosion of Fe-28Al and Fe-18Al-10Nb in a H2/H2S/H2O gas mixture. Materials Sci. and Eng. A, 258(1-2), 146-152. https://doi.org/10.1016/S0921-5093(98)00927-7
3. Wei, S., Xu, B., Wang, H. et al. (2007) High-temperature corrosion-resistance performance of electro-thermal explosion plasma spraying FeAl-base coatings. Surface and Coatings Technology, 201(15), 6768-6771. https://doi.org/10.1016/j.surfcoat.2006.09.122
4. Tortorelli, P.F., Natesan, K. (1998) Critical factors affecting the high-temperature corrosion performance of iron aluminides. Materials Sci. and Eng. A, 258(1-2), 115-125. https://doi.org/10.1016/S0921-5093(98)00924-1
5. Ignatov, D.V., Lazarev, E.M., Abramova, N.V. (1974) Effect of rare-earth metals on kinetics and oxidation mechanism of nickel-chromium-based alloys. In: Influence of physicochemical medium on high-temperature resistance of metallic materials. Moscow, Nauka, 68-72 [in Russian].
6. Nagai, H., Takebayashi, Y., Mitani, H. (1981) Effect of dispersed oxides of rare earths and other reactive elements on the high temperature oxidation resistance of Fe-20Cr alloy. Metallurgical and Materials Transact. A, 12(3), 435-442. https://doi.org/10.1007/BF02648540
7. Xingwei, M., Zhuji, J., Shi, Y., Jiujun, X. (2009) Effect of La2O3 on microstructure and high-temperature wear property of hot-press sintering FeAl intermetallic compound. J. of Rare Earths, 27(6), 1031-1036. https://doi.org/10.1016/S1002-0721(08)60383-X
8. Wang, Y., Yan, M. (2006) The effect of CeO2 on the erosion and abrasive wear of thermal sprayed FeAl intermetallic alloy coatings. Wear, 261, 1201-1207. https://doi.org/10.1016/j.wear.2006.03.039
9. Xiao, Ch., Chen, W. (2006) Sulfidation resistance of CeO2-modified HVOF sprayed FeAl coatings at 700 °C. Surface and Coatings Technology, 201, 3625-3632. https://doi.org/10.1016/j.surfcoat.2006.08.138
10. Magnee, A., Offergeld, M., Leroy, A. Lefort, A. (1998) FeAl intermetallic coatings applications to thermal energy conversion advanced systems. In: Proc. of the 15th ITSC, France, Nice, 1091-1096.
11. Nikitin, V.I. (1976) Calculation of heat resistance of metals. Moscow, Metallurgiya [in Russian].
12. Nikitin, V.I. (1981) Method of prediction of life of protective coatings. Fiz.-Khimich. Mekhanika Materialov, 3, 95-99 [in Russian].