Electrospark Deposition of Ti – Al – Cr – B Coatings on Titanium Alloy VT3-1

• Published in: Metal science and heat treatment 2024-03, Vol.65 (11-12), p.698-705
• Main Authors: Burkov, A. A., Kulik, M. A., Khe, V. K., Krutikova, V. O.
• Format: Article
• Language: English
• Subjects: Aluminum; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chromium borides; Classical Mechanics; Coatings; Corrosion rate; Corrosion resistance; Deposition; Electrochemical impedance spectroscopy; Engineering Thermodynamics; Heat and Mass Transfer; Materials Science; Metallic Materials; Oxidation resistance; Surface hardness; Titanium alloys; Titanium base alloys; Wear resistance
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/s11041-024-00992-9

Coatings on a titanium alloy are prepared by electrospark deposition with a non-localized anode consisting of titanium and aluminum granules with addition of chromium diboride powder. With increase of the CrB 2 concentration from 2 to 10 vol.%, the gain in the weight of the cathode increases monotonically from 4.10 to 9.56 mg/cm 2 . According to the data of polarization tests and electrochemical impedance spectroscopy, the Ti – Al – Cr – B coatings reduce the corrosion rate of the VT3-1 alloy. The highest oxidation resistance of the coatings is observed for a CrB 2 concentration of 2 vol.%. Deposition of Ti – Al – Cr – B coatings makes it possible to increase the surface hardness of the VT3-1 alloy by a factor of 2.7 – 4. The deposited Ti – Al – Cr – B coatings increase the wear resistance of the surface of titanium alloy VT3-1 by up to a factor of 6.