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Proceedings Paper

Microstructure of high-temperature smart materials
Author(s): Daniel P. Henkel
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Paper Abstract

This paper describes an investigation of the microstructural characteristics for three surface- mounted optical fiber sensors bonded to structural composites for high temperature applications. The primary objective was to identify defect generation mechanisms that occur during thermal cycling and to make processing and testing recommendations that would optimize their measurement performance. A second objective was to identify areas of microstructural research that would have the most significant impact on the development of high temperature smart materials. The three high temperature smart material systems investigated were: (1) a silica optical fiber sensor bonded to a titanium-matrix composite (TMC) using a nickel-base plasma spray, (2) a silica optical fiber sensor bonded to a TMC using a ceramic cement, and (3) a sapphire optical fiber sensor bonded to a carbon-carbon composite (CCC) using a ceramic cement. The microstructure of each system was characterized in terms of morphology and fracture mechanisms using conventional microscopic, metallographic, and analytical techniques.

Paper Details

Date Published: 23 July 1993
PDF: 12 pages
Proc. SPIE 1916, Smart Structures and Materials 1993: Smart Materials, (23 July 1993); doi: 10.1117/12.148463
Show Author Affiliations
Daniel P. Henkel, Analytical Services and Materials, Inc. and NASA Langley Research Ctr. (United States)

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

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