All ETDs from UAB

Advisory Committee Chair

Yogesh K Vohra

Advisory Committee Members

Shane A Catledge

Andrew A Wereszczak

Document Type

Thesis

Date of Award

2017

Degree Name by School

Master of Science (MS) College of Arts and Sciences

Abstract

Multi-angle energy-dispersive X-ray diffraction and white-beam radiography studies were conducted on a borosilicate glass sample (17.6% B2O3) to 13.7 GPa in a Paris-Edinburgh (PE) press at Beamline 16-BM-B, HPCAT, The Advanced Photon Source, Argonne National Laboratory. The measured structure factor S(q) to q = 19 Å-1 was used to determine internuclear bond distances between various species of atoms contained in the glass sample. Gold foil was used as the pressure standard. Bond distances for Si-O, O-O, and Si-Si were determined from the reduced pair distribution function G(r) and were measured as a function of pressure. The sample height, as determined via white-beam radiography, showed an overall uniaxial compression of 22.5% at 13.7 GPa and a 10.6% permanent compaction after decompression to ambient conditions. Raman spectroscopy of the pressure recovered borosilicate glass sample as compared to the bulk starting material shows blue-shift and changes in intensities and widths of the Raman bands associated with four-coordinated boron and silicate rings.

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