Metal oxide (Ti, Ta)-(TiO2, TaO) coatings produced on titanium using electrospark alloying and modified by induction heat treatment. (15th July 2018)

• Record Type: Journal Article
• Authors: Koshuro, Vladimir; Fomina, Marina; Fomin, Aleksandr; Rodionov, Igor
• Is Part Of: Composite structures. Volume 196(2018)
• Page Start: 1
• Page End: 7
• Publication Date: 2018-07-15
• Subjects: Electrospark alloying -- Induction heat treatment -- Tantalum -- Tantalum oxide -- Metal oxide coating; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2018.05.005
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: Metal oxide coatings (Ti, Ta)-(TiO2, TaO) on VT1-00 cp-titanium and VT16 titanium alloy (Ti-3Al-4.5 V-5.0Mo) were formed by electrospark alloying (ESA) at an operating current from 1 to 2.5 A and subsequent induction heat treatment (IHT) with the duration from 30 to 300 s at the temperature of 800 °C. ESA at a high operating current I = 2.5 A and subsequent IHT with a long exposure time t = 300 s ensured the formation of coatings with a high content of tantalum (about 4.5–5%) and tantalum oxide TaO (about 7–8%). The resulting coatings were characterized by high hardness of 9.5–15 GPa and elastic modulus E of 450–700 GPa.