Aluminum nitride articles by carbothermal nitridation

摘要

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.