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Titanium nitride coatings synthesized by IPD method with eliminated current oscillations

Abstract

This paper presents the effects of elimination of current oscillations within the coaxial plasma accelerator during IPD deposition process on the morphology, phase structure and properties of synthesized TiN coatings. Current observations of waveforms have been made by use of an oscilloscope. As a test material for experiments, titanium nitride TiN coatings synthesized on silicon and high-speed steel substrates were used. The coatings morphology, phase composition and wear resistance properties were determined. The character of current waveforms in the plasma accelerator electric circuit plays a crucial role during the coatings synthesis process. Elimination of the current oscillations leads to obtaining an ultrafine grained structure of titanium nitride coatings and to disappearance of the tendency to structure columnarization. The coatings obtained during processes of a non-oscillating character are distinguished by better wear-resistance properties.

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Study of Selected Properties of Thermally Sprayed Coatings Containing WC and WB Hard Particles

Abstract

The paper presents results of research of the essential characteristics of two kinds of advanced coatings applied by HVOF technology. One studied coating: WB-WC-Co (60-30-10%) contains two types of hard particles (WC and WB), the second coating is eco-friendly alternative to the previously used WC-based coatings, called “green carbides” with the composition WC-FeCrAl (85-15%). In green carbides coating the heavy metals (Co, Ni, NiCr) forming the binding matrix in conventional wear-resistant coatings are replaced by more environmentally friendly matrix based on FeCrAl alloy. On the coatings was carried out: metallographic analysis, measurement of thickness, micro-hardness, adhesion, resistance to thermal cyclic loading and adhesive wear resistance (pin-on-disk test). One thermal cycle consisted of heating the coatings to 600°C, dwell for 10 minutes, and subsequently cooling on the still air. The number of thermal cycles: 10. The base material was stainless steel AISI 316L, pretreatment prior to application of the coating: blasting with white corundum, application device JP-5000.

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A Multi RIG Screening Test for Thin Ceramic Coatings in Bio - Tribological Applications

). C. Richard, C. Kowandy, J. Landoulsi, M. Geetha, H. Ramasawmy, Corrosion and wear behavior of thermally sprayed nano ceramic coatings on commercially pure Titanium and Ti-13Nb-13Zr substrates, Int. Journal of Refractory Metals & Hard Materials Vol. 28, pp. 115-123, (2010) W. Österle, D. Klaffke, M. Griepentrog, U. Gross, I. Kranz, Ch. Knabe, Potential of wear resistant coatings on Ti-6Al-4V for artificial hip joint bearing surfaces, Wear Vol. 264, pp. 505-517 (2008). T. Lubinski, Testing of friction dynamics on a

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Wear Resistance of the Cermet Cutting Tools After Aluminum (Al+) and Nitrogen (N+) Ion Implantation

.A., Matula G.: Podstawy metalurgii proszków i materiały spiekane. Cermetale narzędziowe. Open Access Library 8 (2012) 9-39. 6. Shepard S.R., Suh N.P.: The Effects of Ion Implantation on Friction and Wear of Metals. Journal of Lubrication Technology, 104 (1982) 29-38. 7. Huang X., Etsion I., Shao T., Effects of elastic modulus mismatch between coating and substrate on the friction and wear properties of TiN and TiAlN coating systems. Wear, 338-339 (2015) 54-61. 8. PalDey S., Deevi S.C., Single layer and multilayer wear resistant coatings of (Ti, Al)N: A

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Mechanical Characteristics and Wear Resistance of the Cladding Layers Obtained by Melting of Cored Wires with Simultaneous Vibration of Substrate

., Panin, V. E. “Defect Accumulation in Nanoporous Wear-Resistant Coatings Under Collective Recrystallization: Simulation by Hybrid Cellular Automaton Method”, In: Hsueh C. H. et al. (eds) Handbook of Mechanics of Materials, Springer, Singapore, pp. 1 – 35, 2018 . DOI: 10.1007/978-981-10-6855-3_72-1 [14] Panin, S., Vlasov, I., Dudina, D., Ulianitsky, V., Stankevich, R., Batraev, I., Berto, F. “Mechanical characterization of composite coatings formed by reactive detonation spraying of titanium”, Metals 7 (9), 355, 2017 . DOI: 10.3390/met7090355 [15

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Gas-Dynamic Foil Bearings Application in High-Speed Turbines

, Washington, D.C., USA. [7] Heshmat H., Hryniewicz P., Walton J.F., Willis J.P., Jahanmir S., DellaCorte Ch.: Low-friction wear-resistant coatings for high-temperature foil bearings, Tribology International 38 (2005) 1059-1075. [8] MiTi Developments, Vol. 4, 6, 13, 16-19, 21, 23, 25,26 1998-2006. [9] NASA Facts FS-2001-07-014-GRC, Creating a Turbomachinery Revolution, Research at Glenn Enables an Oil-Free Turbine Engine. [10] Oil-free turbomachinery - foil gas bearings, Lighter Weight Vehicles, Automotive Industry Workshop, www.nasa.gov [11] San Andrés L

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