The Influence of Nanodispersed Modifiers on the Structure and Properties of Plasma-Sprayed Coatings
Background. Currently, plasma-sprayed coatings are widely used to protect machine parts operating under conditions of high loads and temperatures, abrasive wear and exposure to corrosive media.
Objective. The aim of the paper is to improve the physico-mechanical characteristics of plasma-sprayed coatings by modification of nano-sized particles of TiO2 oxides compounds.
Methods. Experimental studies of corrosion resistance, microhardness, adhesion strength and residual stresses of plasma-sprayed coatings based on the oxide aluminum ceramic powder with the addition of nanodisperse TiO2 powder were conducted.
Results. It is found that addition of TiO2 nanodisperse modifier to the oxide aluminum ceramic powder composition leads to corrosion resistance increase 2.8 times in a 10 % hydrochloric acid solution. The adhesive strength of ceramic nanomodified coatings is increased by 15–20 %.Conclusions. The positive influence of nanodispersed powders on the physico-mechanical and tribological characteristics of plasma-sprayed coatings is established.
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C. Vikas et al., “State of art: plasma sprayed nanostructured coatings: A review”, Materials Forum, no. 32, pp. 137–143, 2008.
Ju.I. Gordeev et al., “Design and investigation of carbide and ceramic composites modified with nanoparticles”, in Proc. IV All-Russian Conf. Nanomaterials, Moscow, Russia, 2011, vol. 4, p. 30 (in Russian).
K.L. Dahm et al., “The wear response of ceramic matrix nano-composite coating in simulated piston-ringcylinder wall test environments”, Tribological Res. Design Eng. System, no. 41, pp. 511–515, 2003. doi: 10.1016/S0167-8922(03)80165-7
G.N. Sokolov et al., “Formation features of structure and properties of deposited alloys under the influence of high-melting compound nanoparticles”, Fizika i Himija Obrabotki Materialov, vol. 2, pp. 38–47, 2014 (in Russian).
D. Mohammadrezа et al., “Fabrication and properties of triplex NiCrAlY/nano Al2O3·13%TiO2/nano TiO2 coatings on a magnesium alloy by atmospheric plasma spraying method”, J. Alloys Compounds, vol. 645, pp. 450–466, 2015, doi: 10.1016/j.jallcom.2015.05.106
V. Pratap Singh et al., “A study on sliding and erosive wear behaviour of atmospheric plasma sprayed conventional and nano-structured alumina coatings”, Materials and Design, vol. 32, no. 2, pp. 584–591, 2011. doi: 10.1016/j.matdes.2010.08.019
I.V. Smyrnov et al., “Device for plasma-arc spraying of magnetically controlled coatings”, Ukraine Patent 104371, 2016 (in Ukrainian).
I.V. Smirnov et al., “Structure and corrosion resistance of plasma coatings when spraying ceramic coated powders”, Vіsnyk NTUU KPІ. Ser. Mashinobuduvannja, no. 60, pp. 267–271, 2010 (in Russian).
S. Dong et al., “Study on the mechanism of adhesion improvement using dry-ice blasting for plasma-sprayed Al2О3 coatings”, J. Thermal Spray Technol., vol. 22, no. 2-3, pp. 213–220, 2013.
N.A. Dolgov, “Method for determining the modulus of elasticity for gas thermal spray coatings”, Powder Metallurgy and Metal Ceramics, vol. 43, no. 7-8, pp. 423–428, 2004. doi: 10.1023/B:PMMC.0000048138.67323.49
Y. Li and K.A. Khor, “Mechanical properties of the plasma-sprayed Al2O3/ZrSiO4 coatings”, Surf. Coatings Technol., vol. 150, pp. 143–150, 2002. doi: 10.1016/S0257-8972(01)01526-2
R. Musalek et al., “Non-linear mechanical behavior of plasma sprayed alumina under mechanical and thermal loading”, J. Thermal Spray Technol., vol. 19, no. 1-2, pp. 422–428, 2010. doi: 10.1007/s11666-009-9362-x
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