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Containerless Solidification Studies Of The 1/1 Phase IN TI-(MN, CRFE)-SI-O Alloys

  • T. K Croat (a1), K. F. Kelton (a1), D. Holland-Moritz (a2), T. J. Rathz (a3) and M. B. Robinson (a4)...

Abstract

The nucleation behavior of the 1/1 quasicrystal approximant phase was investigated in Ti-TMSi- O (TM=Mn, Cr, Fe) alloys made near the stoichiometric composition. Containerless solidification studies were performed using electromagnetic (rf) levitation and drop-tube techniques. The solidification microstructures indicate that α-Ti nucleated first in Ti-Cr-Si-O and β-Ti in Ti-Mn-Si-O alloys; the 1/1 phase nucleated and grew on these titanium oxide dendrites. In Ti-Fe-Si-O alloys, the 1/1 phase nucleated and grew directly from the liquid, allowing information on the nucleation rates to be obtained from undercooling data.

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1. Libbert, J.L. and Kelton, K.F., Phil.Mag.Lett., 71, 213 (1995).
2. Holland–Moritz, D., Herlach, D.M., and Urban, K., Acta Met. 46 (5), 601(1998).
3. Rathz, T.J., Robinson, M.B., Hofineister, W.H., and Bayuzick, R.J., Rev. Sci. Instrum. 61 3846(1990
4. Libbert, J.L., Kim, J.Y., and Kelton, K.F., Phil.Mag.Ain ss)

Containerless Solidification Studies Of The 1/1 Phase IN TI-(MN, CRFE)-SI-O Alloys

  • T. K Croat (a1), K. F. Kelton (a1), D. Holland-Moritz (a2), T. J. Rathz (a3) and M. B. Robinson (a4)...

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