"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.
Moore, Robert E., 1930-2003
Anderson, H. U. (Harlan U.)
Summers, David A.
Materials Science and Engineering
M.S. in Ceramic Engineering
University of Missouri--Rolla
ix, 89 pages
© 1973 Russell David Smith, All rights reserved.
Thesis - Open Access
Aluminum oxide -- Thermal properties
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Link to Catalog Record
Smith, Russell David, "The effect of porosity on strength degradation in thermally shocked alumina" (1973). Masters Theses. 3457.