Letter | Published:

A near perfect shape-memory ceramic material

Naturevolume 266pages706707 (1977) | Download Citation

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Abstract

AFTER high temperature plastic deformation and cooling under load to room temperature, glass-ceramics containing mica as the principal crystalline phase retain a near-perfect memory of their undeformed state, the plastic strain being recoverable by a subsequent high temperature anneal. Activation energy measurements support the hypothesis that dislocations in the mica crystals control the shape-memory process.

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References

  1. 1

    Wayman, C. M. in Shape Memory Effects in Alloys (ed. Perkins, J.) 1–27 (Plenum New York, 1975).

  2. 2

    Brown, L. M. & Stobbs, W. M. in Constitutive Equations in Plasticity (ed. Argon, A. S.) (MIT Press, Cambridge, 1976).

  3. 3

    Chyung, C. K., Beall, G. H. & Grossman, D. G. in Electron Microscopy and Structure of Materials (eds Thomas, G., Fulrath, R. M. & Fisher, R. M.) 1167–1194 (Univ. Calif. Press, 1972).

  4. 4

    James, K. & Ashbee, K. H. G. Progr. mater. Sci. 21, 1–59 (1975).

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Affiliations

  1. H. H. Wills Physics Laboratory, University of Bristol, Royal Fort, Tyndall Avenue, Bristol, UK

    • K. E. SCHURCH
    •  & K. H. G. ASHBEE

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https://doi.org/10.1038/266706a0

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