Chemical Strengthening of Ceramic Materials
Abstract
An investigation o the effect of compressive surface layers on the strength of polycrystalline ceramic bodies is described. The compressive surface layers are formed by reactions in the surface of the material at high temperatures, which result in solid solutions having lower thermal expansion coefficients that the bulk of the material. Since the surface layers tend to contract less than the bulk of the material, they are placed in compression during cooling to room temperature. The thermal expansion properties of a wide variety of oxide solid solutions were measured. Several of these materials have lower thermal expansion coefficients than the bodies on which they would be placed. Several methods of forming solid solution surface layers were investigated. Some of these methods show promise for formation of compressive surface layers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 07, 1964
- Accession Number
- AD0448226
Entities
People
- Henry P. Kirchner
- Robert M. Gruver