Hong Huang, Ph.D. (Advisor); Joy Gockel, Ph.D. (Committee Member); Zlatomir Apostolov, Ph.D. (Committee Member)
Master of Science in Materials Science and Engineering (MSMSE)
A metallic network has been embedded in a silicon carbide fiber– silicon carbide (SiC) matrix ceramic composite (CMC) in order to combine the functional properties of the metal and the structural properties of the CMC. The processing of the composite involves iterative pre-ceramic polymer infiltration and heating to temperatures at 1100°C. The metallic structure embedded in the CMC must retain its unique properties during processing and cannot convert to a silicide or carbide resulting from diffusion of Si and C species from the SiC matrix. To gain an understanding of the diffusion process, a fully processed CMC with tungsten, tantalum, and molybdenum wires will be heated at various temperatures for the same duration. The diffusion zone will be measured and then kinetics equations will be applied to determine the failure kinetics. Understanding the diffusion kinetics and phases formed at higher temperature can provide a processing path which avoids metal degradation.
Department or Program
Department of Mechanical and Materials Engineering
Year Degree Awarded
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