Patent · US Expired

Aluminum nitride articles by carbothermal nitridation

US4857246A · kind A · utility

11Cited by
6References
10Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJan 21, 1988
Grant dateAug 15, 1989
Priority date
Expiry dateJan 21, 2008

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC04B35/581
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Aluminum nitride fibers or films are made by carbothermal nitridation of precursor fibers or films which contain a source of alumina and a source of carbon. Improved articles are obtained by providing a stoichiometric excess of carbon, by stabilizing the precursor prior to carbonization and nitridation, by removing excess carbon after nitridation and introducing a sintering aid to promote densification of the final structure.

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