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Proceedings Paper

Mica/gas composites as thermal actuators
Author(s): F. G. Karioris; Louis Cartz; Gary A. Hishmeh; Xinxing Yang; Claude Templier
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Paper Abstract

Natural phlogopite micas have anomalously high, yet reversible thermal expansion, over 100% at 600 degree(s)C, attributed to non-structural water entrapped between the silicate layers. Above 100 degree(s)C, the mica-water vapor composite expands like a gas in an elastic membrane, stable to repeated thermal cycling to over 600 degree(s)C. Muscovite mica-noble gas composites are prepared by implantation and are stable with time and temperature to 600 degree(s)C. The behavior of the implanted gas is studied by Rutherford backscattering and transmission electron microscopy. Helium diffuses out slowly over a period of six months. A capacitometer is required to measure the thermal expansion of implanted specimens less than 1 micrometers thick.

Paper Details

Date Published: 23 July 1993
PDF: 11 pages
Proc. SPIE 1916, Smart Structures and Materials 1993: Smart Materials, (23 July 1993); doi: 10.1117/12.148481
Show Author Affiliations
F. G. Karioris, Marquette Univ. (United States)
Louis Cartz, Marquette Univ. (United States)
Gary A. Hishmeh, Marquette Univ. (United States)
Xinxing Yang, Marquette Univ. (United States)
Claude Templier, Laboratoire de Metallurgie, Poitiers (France)

Published in SPIE Proceedings Vol. 1916:
Smart Structures and Materials 1993: Smart Materials
Vijay K. Varadan, Editor(s)

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