| 摘要 |
A process is described for producing ceramic fibres composed of titanium boride, zirconium boride or hafnium boride. The boride fibres are obtained by reacting a boron oxide precursor fibre with a titanium halide, zirconium halide or hafnium halide gas in the presence of hydrogen. Ceramic titanium, zirconium or hafnium nitride fibres may also be produced by the process, by means of the additional presence of nitrogen gas in the gas phase. The process is conducted at temperature higher than 500.degree.C.
|
