Degree Type

Dissertation

Date of Award

2015

Degree Name

Doctor of Philosophy

Department

Materials Science and Engineering

First Advisor

Ralph E. Napolitano

Abstract

Crystallization under far-from-equilibrium conditions is investigated for two different scenarios: crystallization of the metallic glass alloy Cu50Zr50 and solidification of a transparent organic compound, o-terphenyl. For Cu50Zr50, crystallization kinetics are quantified through a new procedure that directly fits thermal analysis data to the commonly utilized JMAK model. The phase evolution during crystallization is quantified through in-situ measurements (HEXRD, DSC) and ex-situ microstructural analysis (TEM, HRTEM). The influence of chemical partitioning, diffusion, and crystallographic orientation on this sequence are examined. For o-terphenyl, the relationship between crystal growth velocity and interface undercooling is systematically studied via directional solidification.

DOI

https://doi.org/10.31274/etd-180810-4239

Copyright Owner

Timothy Edward Cullinan

Language

en

File Format

application/pdf

File Size

162 pages

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