Composite monolithic free abrasive grinding lap and a method of making the same
US5035725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1990 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Dec 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B38/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composite yet monolithic, free abrasive grinding lap includes a sintered porous matrix of ceramic or metal material and a quantity of silicon, substantially completely filling the pores of the sintered porous matrix preform at least throughout an effective region of the lap that is to come in contact with a workpiece to be acted upon by the lap. The free abrasive grinding lap is made by first slip-casting a preform, then freezing and freeze-drying the same, followed by lightly sintering the dry preform into a porous matrix preform, bringing the temperature of the preform to above the melting point of silicon, and filling the pores with molten silicon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.