Masters Theses

Abstract

"Creep is a major mechanism of failure for many refractory materials. Refractories synthesized from raw materials contain vitreous secondary phases which cause creep problems. A creep test was utilized to test specimens in order to understand the mechanisms which take place at high temperature through determination of the creep rates, activation energies, and stress exponents of the specimens.

Several techniques were used to analyze the specimens before and after creep testing, including X-ray diffraction (XRD), reflective light microscopy (RL), and scanning electron microscope/energy dispersive spectroscopy (SEM/EDS). Morphologies of spinel and secondary phases were observed in all of the test specimens and each are described in detail. Correlations between microstructure and creep rates are also discussed in detail.

Specimens in the Guyana #4 series, Chinese #1 series, and Missouri diaspore #1 series were creep tested at 1350°C to determine their steady state creep rates. The lowest creep rate was obtained for the Guyana #4-2 specimen, 0.2 %/hr. The lowest creep resistance was associated with the Missouri #1 diapsore series. The Guyana #4 bauxite may be used for some refractory applications, while the Chinese #1 series and Missouri #1 series contain too much glass leading, to poor creep resistance for refractories"--Abstract, page 1.

Advisor(s)

Moore, Robert E., 1930-2003

Committee Member(s)

Huebner, Wayne
Wolf, Robert V., 1929-1999

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Sponsor(s)

United States. Department of the Interior

Publisher

University of Missouri--Rolla

Publication Date

Summer 1998

Pagination

xii, 132 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1998 Brad Steven Monton, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Thesis Number

T 7513

Print OCLC #

40182905

Electronic OCLC #

994221946

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