Method of making silicon nitride based cutting tools - ii

Details Method of making silicon nitride based cutting tools - ii Method of making silicon nitride based cutting tools - ii

C - Chemistry, Metallurgy

04

B

25/133, 25/140

C04B 35/58 (2006.01) C04B 35/593 (2006.01)

Patent

CA 1142333

-10- ABSTRACT OF THE DISCLOSURE A method of making a unitary silicon nitride comprising object is disclosed. A uniform powder mixture is prepared of Si3N4 containing SiO2 as an oxide surface coating, 4-12% by weight Y2O3, and .50-2.5% Al2O3. The mixture is heated to 1000-1400°C under a pressure of at least 2,000 psi for a time of at least one minute but sufficient to permit a nucleating reaction to take place in secondary phases. Heating is then increased to a temperature of 1680-1750°C under a pressure and for a period of time sufficient to produce 99.0% or more of full theoretical density in the pressed object.

359892

Affiliated with

Also associated with

Rating

Method of making silicon nitride based cutting tools - ii does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-730372