Accession Number : AD0416036

Title :   A STUDY OF THE PHYSICAL BASIS OF THE MECHANICAL PROPERTIES OF CERAMICS.

Descriptive Note : Final rept., 18 Apr 62-17 Apr 63,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Gross,Gordon E.

Report Date : AUG 1963

Pagination or Media Count : 30

Abstract : A literature survey of the properties of ceram ics, both classical andrecent solid state theory, is presented. A better understanding of the ceramic properties as related to their elec tron-lattice structure was gained by correlating the mechanical properties of brittleness and duc tility with the electronic and crystalline (lat tice) properties of materials. To achieve the above, three goals were set: (1) to establish a physical basis for the brittleness and ductility of insulators (e.g., ceramics) and semi-metallic materials; (2) to develop an understanding of the role of surface energy in fracture of ceram ics and other nonmetals; and (3) to reach some practical conclusions regarding the scatter in test values for strength of ceramic specimens. Experimental methods and results are given for surface energy and Hall coefficient measurements. (Author)

Descriptors :   TDR63 605, PT. 1, (*CERAMIC MATERIALS, MECHANICAL), (*REVIEWS, CERAMIC MATERIALS), FRACTURE (MECHANICS), BERYLLIUM, DUCTILITY, STRESSES, CRYSTAL LATTICES, BRILLOUIN ZONES, BRITTLENESS, HYDROSTATIC PRESSURE, VACUUM, TEST EQUIPMENT, SURFACES, ENERGY, SINGLE CRYS, DATA, MAGNESIUM COMPOUNDS, OXIDES, TEST, GERMANIUM, HALL EFFECT, RESISTANCE, THEORY, BIBLIOGRAPHIES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE