Laser-induced self-propagating reaction synthesis of Ti–Fe alloys

• Published in: Journal of materials science 2008, Vol.43 (1), p.218-221
• Main Authors: Wang, C. S., Zhang, K. S., Pang, H. J., Chen, Y. Z., Dong, C.
• Format: Article
• Language: English
• Subjects: Alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Compressibility; Compressive strength; Cooling rate; Cross-disciplinary physics: materials science; rheology; Crystallography and Scattering Methods; Diffusion layers; Eutectic alloys; Eutectic reactions; Eutectics; Exact sciences and technology; Ferrous alloys; Iron; Iron compounds; Materials Science; Melting; Other topics in materials science; Oxygen; Physics; Polymer Sciences; Reaction synthesis; Self propagation; Solid Mechanics; Titanium; Titanium base alloys
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-007-2146-0

Ti 70.5 Fe 29.5 alloy is synthesized using laser-induced self-propagating reaction synthesis (LSRS). The product mainly consists of β-Ti + TiFe eutectic. However, a given amount of oxygen-stabilized Ti 2 Fe phase is also found in the product due to high cooling rate and oxygen existence. The formation of the fine eutectic structure makes the alloy exhibit high hardness (9.34 GPa), high compressive strength (2609 MPa), and good relative compressibility (8.5%). The phase formation during LSRS can be divided into four stages: melting of Fe particle periphery, formation of a liquid-state Ti–Fe diffusion layer, eutectic reaction, and formation of oxygen-stabilized Ti 2 Fe phase.