ethod of using Si.sub.3 N.sub.4.Y.sub.2 O.sub.3.SiO.sub.2 cerami

Details ethod of using Si.sub.3 N.sub.4.Y.sub.2 O.sub.3.SiO.sub.2 cerami ethod of using Si.sub.3 N.sub.4.Y.sub.2 O.sub.3.SiO.sub.2 cerami

1980-08-29

1982-04-06

Bell, Mark

Gear cutting, milling, or planing

Milling

Process

82 1C, 51308, 51309, 407119, 408 1R, 501 97, 501 98, 501152, B32C 100, C04B 3558, C04B 3550

Patent

active

043233252

ABSTRACT:
A process for machine cutting of cast iron with a shaped tool which is a ceramic having as constituent ingredients about 4 to about 12% by weight Y.sub.2 O.sub.3 and a balance consisting essentially of Si.sub.3 N.sub.4 and which has a density of at least 3.25 gm./cm.sup.3.

REFERENCES:
patent: 3830652 (1974-08-01), Gazze
patent: 3833389 (1974-09-01), Komeya
patent: 4227842 (1980-10-01), Samanta et al.

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