Silicon nitride based cutting tool insert
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United States of America Patent
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Jul 11, 1995
Grant Date -
N/A
app pub date -
May 25, 1994
filing date -
May 25, 1994
priority date (Note) -
In Force
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Abstract
A silicon nitride based composition for manufacturing sintered ceramic articles, in particular cutting tool inserts, having improved density, hardness and fracture toughness characteristics is described. The amounts of yttrium oxide, aluminum nitride and titanium nitride contained in the silicon nitride based mixture are interrelated by a formula to attain substantially improved abrasion resistance.
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