The FactSage FSupsi ultrapure silicon database
TO OBTAIN :
- A LIST OF all the binary AND TERNARY SYSTEMS WHICH HAVE BEEN ASSESSED
- A LIST OF ALL ASSESSED phases IN EACH OF THE SYSTEMS
CLICK ON “List of optimized systems”
The FactSage FSupsi alloy database is directed primarily to the liquid state of silicon-rich alloys, with the particular aim of enabling calculation of impurity concentration levels in ultra-pure silicon.
In addition, a number of elements are included in a Si-rich solid solution phase (diamond structure), although assessed data for solid Si-rich alloys are fewer and less reliable.
Solid phases which may precipitate at low concentration levels of B, C, N and O are also included in the database.
The elements included as impurities in liquid silicon are:
Ag, Al, Au, B, Bi, C, Ca, Co, Cr, Cu, Fe, Ge,
H, Hf, In, Li, Mg, Mn, Mo, N, Ni, O, P, Pb,
Ru, Sb, Sn, Ta, Ti, V, W, Y, Zn, Zr
The elements included in the Si-rich solid solution are:
B, C, Ge, N, Sn, Ti, Zn
All other elements are treated as insoluble in solid Si.
The major source of data has been the assessments contained in the SGTE2004 Solution Database, together with more recent published assessments. One or two original assessments have been carried out as part of the development work on this database.
Specific information on each alloy system can be obtained from the list of references supplied below.
As mentioned above, the database is intended primarily for calculations relating to
Si-rich liquid alloys – generally up to a few percent total solute concentration. Less reliable calculations involving Si-rich solid alloys may be performed for a limited number of impurity elements.
The database is generally valid for temperatures from about 200 to 300oC below the melting temperature of Si (1414oC) to about 1800oC.
In the assessments, the liquid phase has been described using a simple polynomial expression based on a substitutional solution with random mixing. The Si-rich phase with the diamond structure has been described using the same model.
References
Pure Element Data
A.T.Dinsdale, SGTE Data for Pure Elements, Calphad 15 (1991) 317-425
Si-Al: H.Feufel, T.Godecke, H.L.Lukas, F.Sommer, J.Alloys and Compounds 247 (1997) 31-42
Si-Ag: P.Y.Chevalier, Thermochimica Acta, 113 (1988) 33-41
Si-Au: P.Y.Chevalier, Thermodata, Grenoble, private communication, July 1998
Si-B: S.G.Fries, H.L.Lukas, COST 507 (1998) ISBN 92-828-3902-8 pp.126-128
Si-Bi: R.W.Olesinski, G.J.Abbaschian, Bulletin of Alloy Phase Diagrams 6 (1985) 359-361
Si-C: H. Dalaker, Doctoral Thesis, Norwegian University of Science and Technology, 2009.
Si-Ca: C.Anglezio, unpublished work (1991)
Si-Co: S.D.Choi, Calphad 16 (1992) 151-159
Si-Cr: C.A.Coughanowr, I.Ansara, H.L.Lukas, Calphad 18 (1994) 125-140
Si-Cu: M.Jacobs, T.Buhler, COST 507 (1998) ISBN 92-828-3902-8, pp.178-181
Si-Fe: J.Lacaze, B.Sundman, Met.Trans. 22A (1991) 2211-2223 (C-Fe-Si)
Si-Ge: C.Bergman, R.Chastel, R.Castanet, J.Phase Equilib. 13 (1992) 113-119
Si-H: P.J.Spencer, 2008; based on solubility data
Si-Hf: P. Chartrand, estimate based on Si-Ta and Si-Zr, 2008
Si_In: R.W.Olesinski, N.Kanani, G.J.Abbaschian, Bull. Alloy Phase Diags. 6 (1985) 128-130
Si-Li: M.H.Braga, L.F.Malheiros, I.Ansara, J.Phase.Equilib. 16 (1995) 324-330
Si-Mg: H.Feufel, T.Godecke, H.L.Lukas, F.Sommer, J.Alloys and Compounds 247 (1997) 31-42
Si-Mn: J.E.Tibballs, SI, Oslo, Norway (1991) Rep. 890221-5
Si-Mo: J.A.Gisby, NPL, unpublished assessment, 2007
Si-N: P.J.Spencer, 2002; based on ASM published diagram, 1996
Si-Ni: M.Lindholm, B.Sundman, Met.Trans 26A (1996) 2897-2903
Si-O: P.J.Spencer, 2002; based on ASM published diagram, 1996
Si-P: NPL, unpublished work (1989)
Si-Pb: R.W.Olesinski, G.J.Abbaschian, Bull.Alloy Phase Diags. 5 (1984) 271-273
Si-Ru: Thermodata, Grenoble, 2005; provided to SGTE
Si-Sb: R.W.Olesinski, G.J.Abbaschian, Bull.Alloy Phase Diags. 6 (1985) 445-448
Si-Sn: M.H.G.Jacobs, P.J.Spencer, Calphad 20 (1996) 89-91
Si-Ta: C.Vahlas, P-Y.Chevalier, E.Blanquet, CALPHAD 13 (1989) 273-292
Si-Ti: H.Seifert, COST 507 (1998) ISBN 92-828-3902-8, pp.266-269
Si-V: M.H.Rand, COST 507 (1994) ISBN 2-87263-156-9, p.182
Si-W: C.Vahlas, P-Y.Chevalier, E.Blanquet, CALPHAD 13 (1989) 273-292
Si-Y: Q.Ran, H-L.Lukas, G.Effenberg, G.Petzow, Z. Metallkde. 80 (1989) 402-405
Si-Zn: M.H.G.Jacobs, P.J.Spencer, Calphad 20 (1996) 307-320
Si-Zr: C.Gueneau, C.Servant, I.Ansara, N.Dupin, CALPHAD 18 (1994) 319-327