Masters Theses

Abstract

"The strength and microstructure of a glass-ceramic material of the composition 53 percent SiO₂, 19 percent Al₂O₃, 15 percent MgO, and 13 percent Li₂O were studied. Cylindrical specimens of glass were formed and heat-treated to six different temperature levels for various time periods. The method of strength testing used was a diametral compression loading technique. It was found that the strength of this material increased initially with heat-treatment but then decreased. The strength characteristics of the completely crystallized glass ceramic material were found to be dependent on the initial nucleation period. Some factors which influenced anomalous crystal growth are described. The relationship of stress and nucleation in this study is discussed. Mechanisms of nucleation and crystallization were observed by transmitted and reflected light microscopy. The phases at various time periods were determined by X-ray diffraction, and the changes in softening characteristics were recorded by means of thermal dilatometer tests"--Abstract, page ii.

Advisor(s)

Day, D. E.
Moore, Robert E., 1930-2003

Committee Member(s)

Planje, Theodore J., 1919-1980
Fisher, E. D.
Davidson, Robert F., 1911-1971

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Sponsor(s)

Kaiser Aluminum and Chemical Corporation

Comments

Advisors Dr. Delbert E. Day and Dr. Robert E. Moore--Page iii.

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1962

Pagination

ix, 118 pages

Rights

© 1962 P. Darrell Ownby, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Glass-ceramics -- Heat treatment
Glass-ceramics -- Microstructure
Crystallization
Nucleation

Thesis Number

T 1434

Print OCLC #

5949371

Electronic OCLC #

879280067

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