Abrasive materials
US4591364A · kind A · utility
Inventor
Key dates
| Filing date | Sep 5, 1980 |
| Grant date | May 27, 1986 |
| Priority date | — |
| Expiry date | Sep 5, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/1436
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of making aggregated diamond abrasive particles comprising forming a mixture of diamond abrasive particles and a powdered metal, heating the mixture to sinter the metal followed by cooling to produce a mass and crushing the mass to obtain the aggregated particles, characterized in that the particles are selected from Types A, B and C, as hereinafter defined, and mixtures thereof: PA0 Particles of Type A have the following characteristics: PA1 1. A Friatest Index of about 70 to 90 for those particles of size 74 to 88 microns. PA1 2. Medium metal content. PA1 3. Predominantly translucent color with the occasional transparent white, grey and yellow particle. PA1 4. Predominantly blocky shape tending towards elongate particles. PA1 5. Predominantly rough and undulating surface. PA0 Particles of Type B have the following characteristics: PA1 1. Weak, having a Friatest Index of about 65 to 88 for those particles of size 74 to 88 microns. PA1 2. A high metal content. PA1 3. Predominantly dark in color. PA1 4. A blocky and irregular shape. PA1 5. Rough with surface irregularities, re-entrant angles and etch pits. PA0 Particles of Type C have the following characteristics: PA1 1. M…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.