15 November 1996 Utilizing an in-situ sensor to monitor the densification of a borosilicate glass matrix composite
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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.
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Renee M. Kent, Rollie E. Dutton, "Utilizing an in-situ sensor to monitor the densification of a borosilicate glass matrix composite", Proc. SPIE 2948, Nondestructive Evaluation for Process Control in Manufacturing, (15 November 1996); doi: 10.1117/12.259212; https://doi.org/10.1117/12.259212
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KEYWORDS
Composites

Interfaces

Ultrasonics

Sensors

Glasses

Wave propagation

Waveguides

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