Shelling-resistant abrasive grain, a method of making the same, and abrasive products
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Oct 14, 1988
filing date -
Oct 14, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Sintered 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 particles 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 to the surface of each of the first particles.
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