Process for producing .beta.-sialon based sintered bodies
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United States of America Patent
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Apr 12, 1994
Grant Date -
N/A
app pub date -
Oct 21, 1991
filing date -
Apr 28, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a process for producing .beta.-sialon based sintered bodies having a fracture toughness (K.sub.IC) of at least 6.5 MPam.sup.1/2. The process comprises preparing a feed that consists of 0.5-20 wt % of a sintering aid (e.g. MgO) with an average particle size of no more than 5.0 .mu.m, 3-40 wt % of an additive (e.g. SiC) with an average particle size of no more than 5.0 .mu.m, with the remainder being a .beta.-sialon powder having an average particle size of no more than 2.0 .mu.m, wet mixing the individual feeds to form a slurry, drying the slurry and sintering the dried slurry.
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