Lightweight boron carbide materials with improved mechanical...

Details Lightweight boron carbide materials with improved mechanical... Lightweight boron carbide materials with improved mechanical...

2007-12-18

2007-12-18

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

C501S096400, C501S098400

Reexamination Certificate

active

11174689

ABSTRACT:
This disclosure describes sintered bodies comprising about 90 wt % to about 99 wt % of boron carbide, having a B:C atomic ratio ranging from 3.8 to 4.5:1; 0 to 1 wt % free carbon; 0 to 1 wt % BN or AlN, remainder an oxide binder phase; said sintered body having a uniform microstructure composed of substantially equiaxed grains of said boron carbide; the oxide binder phase comprising at least a rare earth aluminate and optionally Al2O3or other ternary or binary phases of rare earth oxide-alumina systems; the binder phase being present in form of pockets at the multiple grain junctions and the density of no more than 2.6 g/cm3. Also described is a manufacturing process for the above described substantially pore-free, sintered boron carbide materials with high strength and fracture toughness, which can be used for production of large-area parts. This is achieved by liquid phase low temperature-low pressure hot pressing of boron carbide in an argon atmosphere.

REFERENCES:
patent: 4097293 (1978-06-01), Komeya et al.
patent: 5330942 (1994-07-01), Sigl et al.
patent: 5543370 (1996-08-01), Sigl et al.
patent: 2006/0188348 (2006-08-01), Yeckley et al.
patent: 2006/0189474 (2006-08-01), Yeckley et al.

Affiliated with

Also associated with

Rating

Lightweight boron carbide materials with improved mechanical... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lightweight boron carbide materials with improved mechanical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lightweight boron carbide materials with improved mechanical... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3830942