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Spontaneous Ejecta From [Beta]-Eucryptite Composites

Published

Author(s)

Ivar E. Reimanis, C Seick, K Fitzpatrick, Lin-Sien H. Lum, S Landin

Abstract

Polycrystalline ceramic composites, comprised of primarily b-eucryptite (LiAlSiO4) and lithium aluminate (LiAl5O8) crystals, with a near-zero coefficient of thermal expansion were examined with indentation experiments. A unique behavior is reported: subsequent to the indentation, the material responds by ejecting multiple particles violently from the area of the indent for a time period up to several minutes. The behavior is suppressed in the absence of moisture. An estimate of the source of energy for this process and a potential mechanism are discussed.
Citation
Journal of the American Ceramic Society

Keywords

composites, ejecta, eucryptite, microcracking, misfil strains, thermal expansion anisotropy, transformation

Citation

Reimanis, I. , Seick, C. , Fitzpatrick, K. , Lum, L. and Landin, S. (2017), Spontaneous Ejecta From [Beta]-Eucryptite Composites, Journal of the American Ceramic Society (Accessed June 19, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created February 19, 2017