Patent · US Expired

Ceramic fibers having improved surface properties/rupture strength

US5043045A · kind A · utility

3Cited by
2References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 10, 1989
Grant dateAug 27, 1991
Priority date—
Expiry dateMay 10, 2009

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC04B41/5353
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Ceramic fibers based on silicon carbide, silicon nitride or silicon carbonitride are treated with hydrofluoric acid, e.g., with a 3% to 30% aqueous solution of HF, to strip surface impurities therefrom, to reduce critical surface defects and to enhance the rupture strength thereof.

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