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Proceedings Paper

Utilizing an in-situ sensor to monitor the densification of a borosilicate glass matrix composite
Author(s): Renee M. Kent; Rollie E. Dutton
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Paper Abstract

In this work, we demonstrate the multifunctional use of fibers as reinforcement and process sensors. We show that monitoring the ultrasonic signal response through the reinforcing fiber in glass matrix composites yields on-line information which is related to the densification of the composite. A single monofilament SiC fiber is used as an ultrasonic waveguide to transmit 0.5MHz ultrasound through the sample during firing. The leakage of the ultrasound to the matrix was found to be a strong function of the instantaneous relative density of the matrix in the vicinity of the fiber. Two different SiC fibers were used to investigate the effects of the interface bonding upon leakage. It was shown that the 'sensor' data can be used to aid in the process design and optimize the firing schedule by minimizing the time at temperature necessary to achieve full density.

Paper Details

Date Published: 15 November 1996
PDF: 7 pages
Proc. SPIE 2948, Nondestructive Evaluation for Process Control in Manufacturing, (15 November 1996); doi: 10.1117/12.259212
Show Author Affiliations
Renee M. Kent, Air Force Wright Lab. (United States)
Rollie E. Dutton, Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 2948:
Nondestructive Evaluation for Process Control in Manufacturing
Richard H. Bossi; Tom Moran, Editor(s)

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