Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Effect of substitution of Si by Al on the structural and microstructural properties of nano Ti5Si3 based alloys prepared by MASHS

Authors
Kian Kasraee
Ali Tayebifard
Esmaeil Salahi
Material & Energy Research Center (MERC), Karaj, Iran
10.30501/jamt.2635.70276
Abstract
Ti5Si3 has gained significant attention as a high temperature structural material due to its unique combination of properties. In the present work nanostructured Ti5Si3 based alloys and composites were synthesized by using mechanically activated self-propagating high-temperature synthesis (MASHS). For this purpose, Ti, Si and Al were mixed according to nominal compositions of Ti62.5Si37.5, Ti62.5Si30Al7.5 and Ti62.5Si22.5Al15 and milled by high energy ball milling for 3 and 6 h. The milled powders were pressed to form pellets and then green compacts were placed in a tube furnace to synthesize. The samples were characterized by X-ray diffraction (XRD) analytical technique and scanning electron microscope (SEM) equipped with an energy-dispersive spectrum (EDS) analyzer. The results have shown, Ti5Si3 were synthesized in all samples as main phase. Ti3Al is synthesized beside the Ti5Si3 in the Ti62.5Si22.5Al15 composition. Crystallites size of Ti5Si3 which had been synthesized by MASHS process was measured by Williamson-hall method. Results howed the entire MASHS product have crystallites size under 100 nm. The EDS results have shown that significant amount of Si can be replaced by Al in the Ti5Si3 structure.
Keywords
Titanium silicide
SHS
Mechanical activation
Nano composite
  1. L. Yeha, R.F. Li, Chem. Eng. J. “A Comparative Study on Combustion Synthesis of Ti-Si Compounds",147 (2009) 405e411.
  2. Mitra, Metall. Mater. Trans. “Effect of Fe Addition On Self-Propagating High temperature Synthesis of Ti5Si3 in Fe-Ti-Si System", A29 (1998) 1629e1641.
  3. Amel-farzad, J. Vahdati-Khaki, A. Haerian, A. Youssefi, “Combustion wave    stability in diluted TiO2/Al/C system in atmospheric air” ,Solid State Sci. 10 (2008) 1958e1969.
  4. N. Thadhani, R.A. Graham, T. Royal, E. Dunbar, M.U. Anderson, G.T. Holman, “Shock-induced chemical reactions in titanium–silicon powder mixtures of different morphologies: time-resolved pressure measurements and materials analysis” , J. Appl. Phys. 82 (1997) 1113–1128.
  5. Mitra, “Microstructure and Mechanical Behavior of Reaction Hot-Pressed Titanium Silicide and Titanium Silicide-Based Alloys and Composites”, Metall. Mater. Trans. A, 1998, 29A, p 1629-1641.
  6. Trambukis and Z. A. Munir, “Effect of Particle Dispersion on the Mechanism of Combustion Synthesis of Titanium Silicide”, J. Am. Cer. Soc., 73 (1990) 1240-1255.
  7. Reuss, H. Vehoff,“Temperature dependence of the fracture toughness of single phase and two phase intermetallics”, scripta Metallurgica et Materialia, 24, (1990) 1021-1026. [8] A. Shilpa, J.C. Eric, Z. Sergei, K. Robert, M. Clifford, J. Alloys Compd. 314 (2001) 99–102.
  8. Y. Kang, H.S. Ryoo, W. Hwang, S.K. Hwang, S.W. Kim,” Explosion synthesis of Ti5Si3-Cu intermetallic compound”, Mater Sci Eng A 270 (1999) 330–338.
  9. L. Guan, H.Y. Wang, S.L. Li, W.N. Zhang, S.J. Lü, Q.C. Jiang,” Effect of Fe addition on self propagating high- temperature synthesis of Ti5Si3 in Fe–Ti–Si system”, J Alloy Compd, 456 (2008), 79 84.
  10. Vehoff, S. Reuss,W. Vogt, P. Specht, “Zhou,” Characterization of mechanically alloyed Ti-Al-Si powder blends and their subsequent thermal stability” Struct. Intermetall. (1993) 657–663.
  11. L. Yeh and R.F. Lic, “Formation of TiAl-Ti5Si3 and TiAl-Al2O3 In Situ Composites by Combustion Synthesis”, Intermetallics, 2008, 16, p 64–70.
  12. Zha, H.Y.Wang, S.T. Li, S.L. Li, Q.L. Guan, Q.C. Jiang, “Influence of Al addition on the products of self-propagating high-temperature synthesis of Al–Ti–Si system”, Mater Chem Phys 114 (2009) 709–715.
  13. S. Stoloff, “Pulsed Current Activated Combustion Synthesis and Consolidation of Nanostructured TaSi2”, Mat. Sci. Eng. A261: 169-180(1999).
  14. Mossino “Some aspects in self-propagating high-temperature synthesis”, Ceramics International 30 (2004) 311–332.
  15. R. Bowen, B. Derby, self propagating high temperature synthesis of ceramic materials, Brit Ceramic T, 96 (1997) 25-31.
  16. Suryanarayana,” Mechanical alloying and milling”, Progress in Materials Science 46 (2001) 1-184.
  17. Kasraee, A. Tayebifard, E. Salahi, “Effect of substitution of Si by Al on microstructure and synthesis behavior of Ti5Si3 based alloys fabricated by mechanically activated self-propagating high-temperature synthesis”, Advanced Powder Technology 24 (2014) 885-890.
  18. Kasraee, A. Tayebifard, E. Salahi, “Investigation of Pre-milling Effect on Synthesis of Ti5Si3   Prepared by MASHS, SHS, and MA”, Journal of Materials Engineering and Performance 22(2013) 3742-3748.

 

Journal of Advanced Materials and Technologies
Volume 3, Issue 3
Autumn 2014
Pages 9-16

  • Receive Date 31 May 2013
  • Revise Date 26 July 2014
  • Accept Date 19 August 2014