Shelling-resistant abrasive grain, a method of making the same,

Details Shelling-resistant abrasive grain, a method of making the same, Shelling-resistant abrasive grain, a method of making the same,

1990-08-27

1992-04-07

Dixon, Jr., William R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51298, 51307, 51308, B24D 1100

Patent

active

051024292

ABSTRACT:
Sinter ceramic abrasive grains having increased surface area and a method of making the same are provided. The abrasive grains are incorporated into improved "shelling-resistant" abrasive articles such as coated abrasives, grinding wheels and non-woven abrasives. The ceramic abrasive grains are made by providing first particles comprising alpha-alumina precursor, introducing fine parpticles which can be sintered directly to the surface of the first particles upon sintering of the same, and heating the mixture of particles under sintering conditions to cause autogenous bonding of the fine particles of the surface of each of the first particles.

REFERENCES:
patent: 3893826 (1975-07-01), Quinan et al.
patent: 4314827 (1982-02-01), Leitheiser et al.
patent: 4461799 (1984-07-01), Gavrilov et al.
patent: 4518397 (1985-05-01), Leitheiser et al.
patent: 4574003 (1986-03-01), Gerk
patent: 4623364 (1986-11-01), Cottringer et al.
patent: 4744802 (1988-05-01), Schwabel

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