Date of Award

Spring 2020

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Mechanical & Aerospace Engineering

Program/Concentration

Mechanical Engineering

Committee Director

Dipankar Ghosh

Committee Member

Abdelmageed Elmustafa

Committee Member

Xiaoyu Zhang

Committee Member

Oleksandr Kravchenko

Committee Member

Mileta Tomovic

Abstract

Open-cell macroporous ceramics have a significant impact on advancing various engineering endeavors such as bone-tissue engineering, lithium-ion batteries, filtration, thermal insulation, impact protection, etc. While pore orientation in conventional open-cell foams is random, in recent years, significant interest has grown in utilizing directionally porous ceramics in these applications to enhance performance. Ice-templating has emerged as a versatile technique that can synthesize directionally macroporous ceramics with low pore tortuosity. Although the fabrication is relatively straightforward, the challenge is that there are numerous variables associated with this technique, which can have significant effects on the final structure and macroscopic properties. As a result, understanding structure-property relationships in these materials is of continuing interest for the envisioned endeavors.

The central motivation of this dissertation is driven by understanding the role of particle size in tailoring ice-templated structure and compressive mechanical properties and address the underlying structure-mechanical property relationships. The notion for investigating particle size effects is that an increase in particle size can increase lamellar bridge density but without causing a considerable change in porosity. The proposed concept is that replacing a small volume fraction of fine particles with large particles provides a novel approach to tailor lamellar bridge density in ice-templated porous ceramics.

DOI

10.25777/eg5x-am72

ORCID

0000-0001-7934-7186

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