MTDATA – Phase Diagram Software from the National Physical Laboratory









SGSOL - The SGTE Solution Database for use with MTDATA

SGTE LogoThe SGTE Solution Database is developed and maintained by SGTE, a consortium of centres engaged in the development of thermodynamic databanks for inorganic and metallurgical systems and their application to practical problems. It is a general purpose database for use with MTDATA for the calculation of phase equilibria and thermodynamic properties for a wide range of alloy systems. The database is particularly strong for steels, aluminium alloys and 3-5 semiconductor systems and contains good coverage of binary data for low melting point systems, eg solders.

The SGTE Solution Database contains data for multicomponent, non-ideal solution phases.

Elements included in the current version (4.3) of the database are:

Ag, Al, Am, As, Au, B, Ba, Be, Bi, C, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Hg, Ho, In, Ir, K, La, Li, Lu, Mg, Mn, Mo, N, Na, Nb, Nd, Ni, Np, O, Os, P, Pa, Pb, Pd, Pr, Pt, Pu, Rb, Re, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Ta, Tb, Te, Th, Ti, Tl, Tm, U, V, W, Tb, Zn, Zr.

Between these elements, there are assessed data for over 440 binary and higher-order combinations. For example, taking aluminium alone, there are data for liquid, solid-solution and stoichiometric phases in the following systems:

Al-Ag, Al-As, Al-Au, Al-B, Al-Bi, Al-C, Al-Ca, Al-Ce, Al-Cr, Al-Cu, Al-Fe, Al-Ga, Al-Ge, Al-Hg, Al-In, Al-La, Al-Li, Al-Mg, Al-Mn, Al-Mo, Al-N, Al-Nb, Al-Nd, Al-Ni, Al-P, Al-Pb, Al-Ru, Al-Sb, Al-Si, Al-Sn, Al-Ta, Al-Ti, Al-V, Al-W, Al-Y, Al-Zn, Al-Zr, Al-C-Si, Al-Ca-Si, Al-Cu-Li, Al-Cu-Mg, Al-Cu-Si, Al-Fe-Mn, Al-Fe-Si, Al-Ga-In, Al-Ga-Sn, Al-Mg-Mn, Al-Mg-Si, Al-Mg-Zn, Al-Mn-Si, Al-Sn-Zn.

The chart below gives and overview of the coverage of the current version of the database in terms of the binary systems.

MTDATA for Windows screen shot

Please click here for full details of coverage of the database.

Please click here for a periodic table view of coverage of the database.

The database comprises:

  • expression for the Gibbs energy (relative to the weighted sum of the enthalpies of the constituent elements) of the end-member species as a function of temperature.
  • expressions for the excess Gibbs energy for any solution phases formed between the end-member species. These expressions are derived from various thermodynamic models.


Updated 19 August 2008