Super hard-highly pure silicon nitrides

Details Super hard-highly pure silicon nitrides Super hard-highly pure silicon nitrides

1978-07-21

1982-01-26

Bernstein, Hiram H.

Stock material or miscellaneous articles

Composite

Of silicon containing

156DIG99, C30B 2900

Patent

active

043129218

ABSTRACT:
A super hard-highly pure silicon nitride includes a preferentially oriented crystalline silicon nitride having a grain size of 1-50 .mu.m and a micro Vickers hardness of 3,000 kg/mm.sup.2 under a load of 100 g, a finely grained crystalline silicon nitride having an average grain size of less than 1 .mu.m and a micro Vickers hardness of 3,500 kg/mm.sup.2 under a load of 100 g, and an amorphous silicon nitride having a micro Vickers hardness of 2,200 kg/mm.sup.2 under a load of 100 g, and is produced by blowing a nitrogen depositing source and a silicon depositing source on a substrate heated at 500.degree.-1,900.degree. C. with a blowpipe composed of a pipe assembly wherein a first pipe for the nitrogen depositing source is surrounded with a second pipe for the silicon depositing source and the distance from an opening end of the first pipe to the substrate is shorter than the distance from an opening end of the second pipe to the substrate.

REFERENCES:
patent: 3226194 (1965-12-01), Kuntz
patent: 3394991 (1968-07-01), Evans
Whitner, Western Elec. Co. Inc., Tech. Digest #11, Jul. 1968, pp. 5-6.
Grieco, J. Electrochemical Soc.: Solid State Science, Jan. 1968, vol. 115, #5, pp. 525-531.

Affiliated with

Also associated with

Rating

Super hard-highly pure silicon nitrides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Super hard-highly pure silicon nitrides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Super hard-highly pure silicon nitrides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1667106