Ti5Si3 and Ti5Si4
- Practical Electron Microscopy and Database -
- An Online Book -

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TiSix is a more general form of titanium silicide materials. Ti5Si3 is a material suitable for high temperature applications [1, 2]. It has combined properties of a high melting point (2403 K), a low density (4.32 g/cm3), high hardness (11.3 GPa), and a relatively high Young’s modulus (225 GPa) [1].

Ti5Si3 has complex hexagonal structure (D88) with lattice parameters of a = 0.514 nm and c = 0.744 nm, and has 16 atoms per unit cell.

Under some conditions, prior to the disilicide formation [3-5], the initial crystalline phase formed during the Ti–Si interaction is a metal-rich silicide (either Ti5Si3 or Ti5Si4). Then, the disilicides form at the expense of the metal-rich silicide at higher annealing temperature.

 

 

[1] Meschter PJ, Schwartz DS. Silicide-matrix materials for hightemperature applications. J Organomet Chem 1989;52–5.
[2] Murarka SP, Fraser DB. Thin film interaction between titanium and polycrystalline silicon. J Appl Phys 1980;51(1):342–9.
[3] S.-L. Zhang, C. Lavoie, C. Cabral, J.M.E. Harper, F.M. d’Heurle, J. Jordan-Sweet, J. Appl. Phys. 85 (1999) 2617.
[4] L.A. Clevenger, C. Cabral, R.A. Roy, C. Lavoie, J. Jordan- Sweet, S. Brauer, G. Morales, K.F. Ludwig, G.B. Stephenson, Thin Solid Films 289 (1996) 220.
[5] F. M. d’Heurle, J. Mater. Res. 3 (1988) 167.

 

 

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