Method of toughening and modifying ceramic and ceramic products
US6884386B2 · kind B2 · utility
3Cited by
1References
12Claims
0Family size
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Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Sep 20, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B41/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
When a sintered body of ceramic is shot-blasted at normal temperatures to plastically deform the crystal structure of the shot-blasted surface to apply residual stress and is heat-treated to recrystallize fine cracks, dislocated cells in the grain boundary are formed, crystals are finely divided, and the fracture toughness is significantly improved. When the sintered body of ceramic is a thin product, an effective toughening can be attained by shot blasting both the front and back sides. After heat treatment, mechanical strength is significantly improved by removing a part of the modified surface layer by an abrasion treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.