Coated composite silicon nitride cutting tools

Details Coated composite silicon nitride cutting tools Coated composite silicon nitride cutting tools

1983-09-26

1984-04-10

Czaja, Donald E.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51293, 51307, 51309, 427249, 428698, B24D 1100

Patent

active

044418949

ABSTRACT:
Cutting tools and cutting tool inserts having improved mechanical and chemical wear resistance under demanding conditions of machining speed, temperature, or workpiece hardness comprise a composite silicon nitride substrate having at least one intermediate hard adherent coating layer of a refractory material and an outer adherent coating layer. The intermediate adherent coating layer has a different chemical composition than the outer adherent coating layer. The composite silicon nitride substrate body consists essentially of particles of a refractory material uniformly distributed in a matrix consisting essentially of a first phase of silicon nitride and a refractory second phase comprising silicon nitride and an effective amount of a densification aid selected from the group consisting of yttrium oxide, hafnium oxide, the lanthanide rare earth oxides, and mixtures thereof.

REFERENCES:
patent: 3684585 (1972-08-01), Stroup et al.
patent: 3895923 (1975-07-01), Wakefield
patent: 4179301 (1979-12-01), Buljan
patent: 4406667 (1983-09-01), Sarin et al.
patent: 4409004 (1983-10-01), Sarin et al.

Affiliated with

Also associated with

Rating

Coated composite silicon nitride cutting tools does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coated composite silicon nitride cutting tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coated composite silicon nitride cutting tools will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-890905