Patent · US Active

Boron carbide ceramic and manufacturing method thereof

US7893000B2 · kind B2 · utility

1Cited by
2References
9Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 16, 2010
Grant dateFeb 22, 2011
Priority date—
Expiry dateAug 16, 2030

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC04B2235/96
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.