Masters Theses

Keywords and Phrases

Additive Manufacturing; Ceramic Matrix Composites; High-Pressure Infiltration

Abstract

"Ceramic matrix composites were developed in order to increase the fracture toughness, thermal shock resistance, and elongation of ceramic materials, while maintaining the very high temperature capabilities of these materials. A renewed focus has been placed on ceramic matrix composites due to the need for materials that maintain good mechanical strength at very high temperatures, for use in the extreme environments encountered by hypersonic vehicles, jet turbine blades, and the like. However, conventional methods to manufacture CMCs are costly and time consuming. The aim of this work is to develop a method for creating additively manufactured ceramic matrix composites using a high-pressure re-infiltration process. Samples were fabricated using a traditional resin transfer molding technique, as well as the new high-pressure system developed for this work. For both techniques, AM carbon fiber/PEEK composite parts were used for the composite preform, and SC-1008 phenolic resin was used as the ceramic precursor. Pyrolysis cycles were performed between infiltration stages to convert the phenolic resin into the desired carbon matrix. The two techniques were compared to each other, analyzing the latent porosity resulting from each technique, and the resulting microstructure of the composite was examined. The high-pressure re-infiltration system developed in this work had less latent porosity after pyrolysis stages and required fewer re-infiltration and pyrolysis cycles in order to achieve a desired porosity. These results suggest that a high-pressure re-infiltration technique could be used to create carbon/carbon CMCs faster and cheaper than traditional techniques" -- Abstract, p. iii

Advisor(s)

Chandrashekhara, K.

Committee Member(s)

Watts, Jeremym Lee, 1980-
Schmidt, Jillian B.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2024

Pagination

ix, 40 pages

Note about bibliography

Includes_bibliographical_references_(pages 37-39)

Rights

©2024 Samuel Weiler , All Rights Reserved

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 12432

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