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In Situ X-Ray Diffraction of an Arc Weld Showing the Phase Transformations of Ti and Fe as a Function of Position in the Weld Performed at a Synchrotron

Published online by Cambridge University Press:  06 March 2019

Joe Wong ,
J. W. Elmer ,
P. A. Waide  and
E. M. Larson
Joe Wong
Affiliation:
Lawrence Livermore National Laboratory Chemistry and Materials Science Department Livermore, CA 94551, USA
J. W. Elmer
Affiliation:
Lawrence Livermore National Laboratory Chemistry and Materials Science Department Livermore, CA 94551, USA
P. A. Waide
Affiliation:
Lawrence Livermore National Laboratory Chemistry and Materials Science Department Livermore, CA 94551, USA
E. M. Larson*
Affiliation:
Department of Earth and Planetary Science, University of New Mexico Albuquerque, NM 87131, USA
*
† Author to whom correspondence should be addressed.
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Extract

The synchrotron x-ray source provides a unique opportunity to observe many “in-situ” processes. The formation of the “short-lived” intermediate species, Ta2C, during the combustion synthesis of TaC, has been observed and reported by monitoring the Bragg diffraction peaks of the reactants and products, Similarly, the synthesis of the ferroelectric material, BaTiO3, and subsequent phase transfonnation from cubic to tetragonal have also been investigated. These experiments would not have been possible without the high incident x-ray flux available at a synchrotron source.

Information

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 37: Forty-Second Annual Conference on Applications of X-ray Analysis, August 2-6, 1993 , 1993 , pp. 479 - 482
Copyright
Copyright © International Centre for Diffraction Data 1993

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References

1. Wong, Joe, Larson, E.M., Holt, J.B., Waide, P., Rupp, B. & Frahm, R., Science, 249,1406-9, (1990).Google Scholar
2. Frahm, R., Wong, Joe, Holt, J.B., Larson, E.M., Rupp, B. & Waide, P.A., Phys. Rev. B, 46(14), 9205-08, (1992).Google Scholar
3. Larson, E.M., Holt, J.B., Joe Wong, P.A. Waide & Rupp, B., J. Materials Research, 8(7),1533-41, 1993.Google Scholar
4. Larson, E.M., Wong, Joe, Holt, J.B., Waide, P. A. & Rupp, B., in preparation for Solid State Comm.Google Scholar