Processing math: 100%
Issues »  Volume 41, Issue 8

Synthesis of Composite Coatings by Ultrasonic Impact Treatment of VT6 Titanium Alloy

B. M. Mordyuk1, S. M. Voloshko2, A. P. Burmak2, V. V. Mohylko2, M. M. Voron3

1G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
2National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
3Physico-Technological Institute of Metals and Alloys, NAS of Ukraine, 34/1 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 02.10.2018; final version - 12.05.2019. Download: PDF

Modification of the surface layer of VT6 titanium alloy by ultrasonic impact treatment (UIT) with addition of α-Si3N4, β-Si3N4 and Al2O3 powders in the deformation zone is performed. As shown by means of X-ray phase analysis and scanning electron microscopy, the surface layers of composite are formed during severe plastic deformation induced by UIT. High-temperature oxidation of composite layers leads to the formation of continuous coatings. As shown by the gravimetric analysis of samples during the cyclic high-temperature oxidation in the air (20 cycles for 5 hours at a temperature of 650°C), the heat resistance of the modified surface of titanium alloy VT6 is increased. The highest heat resistance is observed for composite coating contained β-Si3N4 particles. The UIT-synthesis of composite layers/coatings increases corrosion resistance of VT6 alloy in 3.5% NaCl aqueous solution and its wear resistance at dry friction. The highest rates are registered for composite coating contained Al2O3 particles.

Key words: ultrasonic impact treatment, composite layers, oxide/nitride powders, coating, heat resistance, corrosion, wear resistance.

URL: http://mfint.imp.kiev.ua/en/abstract/v41/i08/1067.html

DOI: https://doi.org/10.15407/mfint.41.08.1067

PACS: 62.20.Qp, 68.55.J-, 68.55.Nq, 68.60.Bs, 81.05.Ni, 81.40.Ef, 81.40.Pq, 81.65.-b

Citation: B. M. Mordyuk, S. M. Voloshko, A. P. Burmak, V. V. Mohylko, and M. M. Voron, Synthesis of Composite Coatings by Ultrasonic Impact Treatment of VT6 Titanium Alloy, Metallofiz. Noveishie Tekhnol., 41, No. 8: 1067—1086 (2019) (in Ukrainian)

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