The effect of porosity on strength degradation in thermally shocked alumina

Author

Russell David Smith

Abstract

"Strength degradation and crack propagation in Al₂O₃ are shown to depend on the initial strength and porosity of the material. Specimens were fabricated containing between 0 and 5% induced cylindrical, two dimensional, and spherical porosity. The strengths of the various porosity samples decreased discontinuously at a critical quenching temperature. No difference was observed in the critical temperature for the various aluminas; initial strength decrease occurred between 165°C and 175°C temperature differential. The strength retained after thermal shock decreased with increasing initial strength. The degree of damage sustained upon shocking was also characterized by crack density and crack depth measurements. The crack density increases with increasing severity of shock. The crack density is shown to increase with increasing porosity. Crack depth decreases with increasing porosity"--Abstract, page ii.

Advisor(s)

Moore, Robert E., 1930-2003

Committee Member(s)

Anderson, H. U. (Harlan U.)
Summers, David A.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Sponsor(s)

Alcoa

Publisher

University of Missouri--Rolla

Publication Date

1973

Pagination

ix, 89 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1973 Russell David Smith, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Aluminum oxide -- Thermal propertiesThermal stressesPorosity

Thesis Number

T 2944

Print OCLC #

6022686

Electronic OCLC #

914239821

Recommended Citation

Smith, Russell David, "The effect of porosity on strength degradation in thermally shocked alumina" (1973). Masters Theses. 3457.
https://scholarsmine.mst.edu/masters_theses/3457