Accession Number : ADA190712

Title :   Strength and Microstructure of Ceramics.

Descriptive Note : Annual rept. 1 Oct 86-30 Sep 87,

Corporate Author : NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD CERAMICS DIV

Personal Author(s) : Lawn, Brian R ; Swanson, Peter L ; Fairbanks, Carolyn J ; Hockey, Bernard J ; Mai, Yiu-Wing

PDF Url : ADA190712

Report Date : Nov 1987

Pagination or Media Count : 38

Abstract : Our goal in this program continues to be the understanding of the role of microstructure in the strength properties of ceramics. It is becoming increasingly apparent to the brittle fracture community that the toughness characteristics and flaw distributions of structural ceramics can be very much influenced, sometimes with great sensitivity, by small details in the microstructural makeup. For instance, the addition of less than 1% glassy phase to the grain boundaries of alumina polycrystals can alter the fracture properties dramatically, giving rise to significant improvements in strength.

Descriptors :   *CERAMIC MATERIALS, *MICROSTRUCTURE, *STRENGTH(MECHANICS), ALUMINUM OXIDES, BRITTLENESS, DEFECTS(MATERIALS), DISTRIBUTION, FRACTURE(MECHANICS), GRAIN BOUNDARIES, POLYCRYSTALLINE, SENSITIVITY, STRUCTURAL PROPERTIES, TOUGHNESS

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE