| abstract |
The subject of the present invention is a process for manufacturing boron nitride fibers, in particular continuous boron nitride fibers having good mechanical properties, usable for the production of ceramic composite materials such as BN / BN composites, parts thermostructural or antenna radomes. It provides and uses a precursor polymer of formula (I) below: <IMAGE> in which n is an integer, R <1> and R <2>, identical or different, independently represent an alkyl group, and R <3> represents an amino group, a hydrogen atom, an alkyl, a cycloalkyl or a boryl. |