Title:
PREPARATION OF HIGH DENSITY BORON CARBIDE CERAMIC
Document Type and Number:
Japanese Patent JP2653724
Kind Code:
B2
Abstract:
PURPOSE: To ensure high density and high strength by mixing baron carbide powder with a preceramic organosilicon polymer to obtain a prescribed compsn., compacting the mixture and sintering the resultant compact in an inert atmosphere.
CONSTITUTION: Boron carbide powder is blended with a preceramic organosilicon polymer selected from the group consisting of polysiloxanes, polysilazanes, polysilanes, metallopolysiloxanes and metallopolysilanes. The blend is homogeneously mixed to obtain a mixture contg. ≥0.2 wt.% free carbon based on the total weight of charcoal derived from the boron carbide powder and the preceramic organosilicon polymer. The mixture is compacted at ≤500°C and the resultant compact is sintered at ≥2,200°C in an atmosphere of argon or the like to produce the objective boron carbide sintered ceramic body having ≥2.0 g/cm3 density.
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Inventors:
GEERII TOOMASU BAANZU
GURETSUGU ARAN ZANKU
JEFURII AREN EWARUDO
GURETSUGU ARAN ZANKU
JEFURII AREN EWARUDO
Application Number:
JP80000191A
Publication Date:
September 17, 1997
Filing Date:
February 21, 1991
Export Citation:
Assignee:
DAU KOONINGU CORP
International Classes:
C04B35/563; C04B35/645; C08K3/38; C08L83/00; C08L83/04; (IPC1-7): C04B35/563; C08K3/38; C08L83/00
Domestic Patent References:
| JP5428309A | ||||
| JP5372020A | ||||
| JP61225252A | ||||
| JP6021570A |
Attorney, Agent or Firm:
Akira Asamura (2 outside)