Accession Number:

AD0652399

Title:

CHEMICAL STRENGTHENING OF CERAMIC MATERIALS.

Descriptive Note:

Summary rept., 7 Apr 66-6 Apr 67,

Corporate Author:

LINDEN LABS INC STATE COLLEGE PA

Report Date:

1967-04-07

Pagination or Media Count:

156.0

Abstract:

An investigation of the effect of compressive surface layers on the strength of polycrystalline ceramic bodies is described. Low expansion surface layers were formed on conventional ceramics by chemical reactions at high temperatures. Failure, by shearing of the surface layers, was prevented by establishing gradual variations in composition within the body. Chemical strengthening was attempted with alumina, titania, spinel, magnesia, forsterite, steatite, nickel oxide, silica and cordierite bodies and was achieved with several of these materials. Glazing and quenching also resulted in improved flexural strength. Combined processes involving chemical strengthening, atmospheric treatments, glazing and quenching were investigated. In some cases strength increases of more than 90 were observed. The thermal shock resistance of some of the samples was improved. Abrasion of the surfaces of some of the treated samples did not result in loss of strength. Author

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE