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The L12 to DO19 Phase Transformation In The Intermetallic Compound Fe3Ge

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Abstract

A large kinetics hysteresis is found to exist between the forward and backward reactions of the L12 ↔ DO19 transformation in Fe3Ge. The slow DO19 to L12 transformation leaves behind very stable twins and stacking fault debris. In-situ annealing experiments in the transmission electron microscope revealed that nucleation for the reverse L12 to DO19 reaction takes place efficiently at these defects.

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References

  1. A. H. W. Ngan, I. P. Jones and R. E. Smallman, Phil. Mag. A, 65, p. 1003 (1992).

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  2. Q. Z. Chen, A. H. W. Ngan and B. J. Duggan, Intermetallics, in press.

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Acknowledgement

This work was supported by research grants CRCG #337/064/0037 from HKU and M951006 from the State Key Laboratory for Solid State Microstructures of Nanjing University. Attendance at this conference was sponsored by a conference grant for teachers from HKU. QZC was also supported by a HKU Postdoctoral Fellowship.

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Authors and Affiliations

  1. ]Department of Materials Physics, University of Science and Technology Beijing, Beijing, 100083, China

    Q. Z. Chen

  2. Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong

    A. H. W. Ngan & B. J. Duggan

Authors
  1. Q. Z. Chen
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  2. A. H. W. Ngan
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  3. B. J. Duggan
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Chen, Q.Z., Ngan, A.H.W. & Duggan, B.J. The L12 to DO19 Phase Transformation In The Intermetallic Compound Fe3Ge. MRS Online Proceedings Library 481, 225–230 (1997). https://doi.org/10.1557/PROC-481-225

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  • DOI: https://doi.org/10.1557/PROC-481-225

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