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Particle Coarsening of Dispersoids In Rapidly Solidified Ti-5Sn-3Y

Published online by Cambridge University Press:  25 February 2011

Y.Z. Lu ,
B.C. Giessen  and
S.H. Whang
Y.Z. Lu
Affiliation:
Materials Science Division, Barnett Institute, Northeastern University, Boston, MA 02115
B.C. Giessen
Affiliation:
Materials Science Division, Barnett Institute, Northeastern University, Boston, MA 02115
S.H. Whang
Affiliation:
Department of Metallurgy and Materials Science, Polytechnic University, Brooklyn, NY 11201
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Abstract

Rapidly solidified Ti alloys containing rare earth metal dispersoids, such as La or Er, have excellent resistance to coarsening at elevated temperature (700–900°C). In particular, the coarsening of the dispersoid particles in RSP Ti-5Sn-3Y was studied; these particles were found to be Y5Sn3. The measured growth kinetics were found to be compatible with the modified LSW model; it was concluded from the observed parameters that in this alloy the diffusion rate of Y is the rate determining factor, providing a measurement of the diffusion coefficient of Y in a Ti matrix and yielding its activation energy Q = 272 kJ/mole.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 377
Copyright
Copyright © Materials Research Society 1986

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References

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