Pressure-sintered polycpystalline mixed materials with a base of

Details Pressure-sintered polycpystalline mixed materials with a base of Pressure-sintered polycpystalline mixed materials with a base of

1989-04-28

1989-12-05

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 92, 501 96, 264 65, C04B 3552, C04B 3570

Patent

active

048852643

ABSTRACT:
Pressure-sintered polycrystalline mixed materials, with a base of boron nitride, oxides and carbides, are provided in which the hexagonal boron nitride fraction is about 30 to about 85% by weight, the oxide fraction (ZrO.sub.2, MgO) is about 10 to about 50% by weight, and the carbide fraction (SiC, TiC, ZrC) is about 5 to about 20% by weight. These mixed materials have a density of at least 94% of the theoretical density and can be produced by hot-pressing powder mixtures composed of hexagonal boron nitride, the selected oxides and carbides at temperatures in the range of from 1500.degree. C. to 1800.degree. C. under a die pressure of 7 to 20 MPa or by isostatically hot-pressing, in a vacuum tight closed case, at temperatures in the range from about 1400.degree. C. to about 1700.degree. C. under a pressure of about 100 to about 300 MPa in a high-pressure autoclave using an inert gas as the pressure transfer medium. These mixed materials are resistant to liquid metals, wear resistant and thermal shock resistant and, owing to these properties, are suitable for use as detachment or break rings in the horizontal continuous casting of steel and non-ferrous metals.

REFERENCES:
patent: 4097293 (1978-06-01), Komeya et al.
patent: 4110084 (1978-08-01), Lee et al.
patent: 4412008 (1983-10-01), Miyamoto et al.
patent: 4469802 (1984-09-01), Endo et al.
patent: 4595545 (1986-06-01), Sane
CA 107:27392u Okuda et al., JP 62, 63, 219 Mar. 19, 1987.
CA 109: 26668z, Koitabashi et al., JP 63, 64973.

Affiliated with

Also associated with

Rating

Pressure-sintered polycpystalline mixed materials with a base of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure-sintered polycpystalline mixed materials with a base of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-sintered polycpystalline mixed materials with a base of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2034309