High strength, low mass porous silicon nitride based articles
US4629707A · kind A · utility
24Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1986 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Jan 21, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J1/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An article is disclosed which is made of silicon nitride based material consisting essentially of in percent by weight about 6% yttrium oxide and the balance silicon nitride. The article has open porosity of from about 37% by volume at which level the strength of the article is about 15 ksi to about 10% by volume open porosity at which level the strength of the article is about 72 ksi. The article can have within its open porosity a lubricating material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.