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

Published online by Cambridge University Press:  10 February 2011

T. K Croat ,
K. F. Kelton ,
D. Holland-Moritz ,
T. J. Rathz  and
M. B. Robinson
T. K Croat
Affiliation:
Physics Department, Washington University, St. Louis, MO 63130
K. F. Kelton
Affiliation:
Physics Department, Washington University, St. Louis, MO 63130
D. Holland-Moritz
Affiliation:
Institut fur Raumsimulation, DLR, D-51170, Koln, Germany
T. J. Rathz
Affiliation:
University of Alabama, Huntsville, AL
M. B. Robinson
Affiliation:
NASA/ George C. Marshall Space Flight Center, Huntsville, AL 35812
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 553: Symposium LL – Quasicrystals , 1998 , 43
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

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