Production of Alloys Based on Ti–Nb–Zr, Promising for the Production of Implants

• Published in: Russian journal of physical chemistry. B 2021-07, Vol.15 (4), p.740-747
• Main Authors: Dolukhanyan, S. K., Aleksanyan, A. G., Muradyan, G. N., Ter-Galstyan, O. P., Mnatsakanyan, N. L., Mnatsakanyan, A. S.
• Format: Article
• Language: English
• Subjects: Alloys; Biomedical materials; Chemical Physics of Nanomaterials; Chemistry; Chemistry and Materials Science; Electric arc melting; Metal hydrides; Physical Chemistry; Self propagating high temperature synthesis; Surgical implants; Titanium base alloys; Titanium compounds; Zirconium hydrides
• ISSN: 1990-7931; 1990-7923
• DOI: 10.1134/S1990793121040035

The formation process of the well-known biomedical alloy of the Ti–21Nb–5Zr (at %) composition is studied by the hydride cycle (HC) method. TiH 2 hydrides (content H 2 , 4.01 wt %), ZrH 2 (content H 2 , 2 wt %), and NbH 1.23 (content H 2 , 1.31 wt %) are preliminarily synthesized by self-propagating high-temperature synthesis (SHS). The experiments are carried out in a sealed installation consisting of a quartz reactor, a furnace, and devices for controlling the vacuum and temperatures in the reactor. The reactor’s temperature is gradually increased to 1000°C and the sample is kept at this temperature for 30–60 min. The following reaction is investigated: 74% TiH 2 + 21% NbH 1.23 + 5% ZrH 2 → Ti 0.74 Nb 0.21 Zr 0.05 + H 2 ↑. As a result of the HC, the Ti 0.74 Nb 0.21 Zr 0.05 β-alloy containing about 20.2% of the α-phase was synthesized. Ti 0.74 Nb 0.21 Zr 0.05 alloy samples without crushing in the SHS mode interacted with hydrogen ( P H = 10 atm), forming an Ti 0.74 Nb 0.21 Zr 0.05 H 1.84 (3 wt %) alloy hydride. A high hydrogen content provides the easy dispersibility of the powder’s grains into micron, submicron, and nano sizes. Ti 0.74 Nb 0.21 Zr 0.05 H 1.84 alloy hydride can be recommended as a biomedical material for manufacturing implants. The core advantages of the HC method to synthesize the β-type Ti 0.74 Nb 0.21 Zr 0.05 alloy are shown compared to the traditional methods (induction and arc melting, etc.). The results obtained make it possible to predict the prospects of using the HC method for the synthesis of biomedical materials.