Structure and properties of electric-spark alloyed TiN, TiB2, and Mo coatings on VT22 titanium alloy and their transformation under light-thermal treatment

• Published in: Materials science (New York, N.Y.) Vol. 45; no. 6; pp. 804 - 809
• Main Authors: Paustovs’kyi, O. V., Pasichnyi, V. V., Tymofeeva, I. I., Molyar, O. H., Novikova, V. I., Shelud’ko, V. E., Mordovets’, N. M., Ostapenko, S. O., Kostenko, O. D., Isaeva, L. P.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-11-2009
• Subjects: Alloying; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coatings; Friction; Materials Science; Oxides; Solid Mechanics; Spark alloying; Structural Materials; Tin base alloys; Titanium base alloys; Titanium diboride; electric-spark alloying; hardness; solar treatment; current; coating; layer
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-010-9246-8

We have established that electric-spark alloyed TiN, TiB
2
, and Mo coatings improve substantially the tribotechnical characteristics of VT22 titanium alloy. It has been shown that an increase in the slip velocity from 1.0 to 10 m/sec increases the wear intensity and friction coefficient by a factor of 1.5–2 and 1.3, respectively. A significant amount of oxides in the coatings and their additional alloying with titanium after treatment by concentrated solar radiation favor a 3–4 times increase in the layer thickness but lower its tribotechnical properties.