CHARACTERIZATION OF CERAMIC MATRIX COMPOSITE MATERIALS USING MILLIMETER-WAVE TECHNIQUES

This thesis describes studies that were carried out on Ceramic Matrix Composite (CMC) materials. These materials were provided by the Air Force Research Laboratory for evaluation in the millimeter-wave frequency region with the goal of developing Non-Destructive Evaluation techniques. This thesis centers on describing the measured reflections from an Oxide/Oxide and SiC/SiNC CMC materials. Models were derived from the Fresnel equations to account for the reflected and transmitted waves in these materials. System models were developed to describe the power coupling of the spectra measured in three separate measurement systems. Using these models the complex index of refraction was determined for the Oxide/Oxide material, and the front surface reflectance was determined for the SiC/SiNC material. A discussion of changes in sample optical properties due to material fatiguing will be included. This document will conclude with the complete spectra and statistical analyses of the Oxide/Oxide, and SiC/SiNC materials at 140-220, and 585-630 GHz.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Physics

Grantor dc:publisher

Wright State University

Year dc:date

2012

Author dc:creator

• Bischoff, Matthew Lee

Contributors dc:contributor

• Petkie, Doug

• Physics
• Optics
• Materials Science

Statement dc:rights

• unrestricted
• This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.

Language dc:language

English

Repository record dc:identifier

http://rave.ohiolink.edu/etdc/view?acc_num=wright1362655198

OAI identifier oai:identifier

oai:etd.ohiolink.edu:wright1362655198