Accession Number : AD0716886

Title :   Effects of Surface Finishing on Mechanical and Other Physical Properties of Ceramics.

Descriptive Note : Technical rept.,

Corporate Author : HONEYWELL INC HOPKINS MINN CORPORATE RESEARCH CENTER

Personal Author(s) : Stokes,Robert J.

Report Date : DEC 1970

Pagination or Media Count : 38

Abstract : The report reviews the effects of mechanical finishing operations on the physical properties of ceramics. Ceramic machining results in a defective surface containing cracks, dislocations, point defects and residual stresses. The relative significance of these defects depends on the physical property of interest. The mechanical properties of single crystals are sensitive to dislocations (semi-brittle) and surface cracks (brittle); the mechanical properties of polycrystals are sensitive to surface cracks; the electrical properties of semiconductors are sensitive to surface trapping sites; magnetic, piezoelectric and optical properties are particularly sensitive to residual stresses. To optimize physical properties these defects must be eliminated by mechanical lapping, chemical etching or thermal annealing. (Author)

Descriptors :   (*CERAMIC MATERIALS, *MACHINING), FINISHES, SURFACES, CRACKS, CRYSTAL DEFECTS, STRESSES, MECHANICAL PROPERTIES, DISLOCATIONS, SEMICONDUCTORS, MAGNETIC PROPERTIES, OPTICAL PROPERTIES

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE