Process for coating of oxide fibers with metal aluminates for the manufacture of composites having failure tolerance and high temperature and oxidation resistance

摘要

Process for coating oxidic fibre materials with metal aluminates comprises: (a) wetting the fibre material with a sol derived from compounds of metals of group IIa, except Mg, group IIIa, except B, and/or group IIIb, IVb, Vb or VIb, except Y, including lanthanides, except Sm, and at least an Al compound; (b) separating the fibre material from the sol; (c) repeating steps (a) and (b); (d) drying the fibre material at temps. up to 400 degrees C and at pressures at most 5 mbar over the period of several hours; and (e) temp. treating the fibre material at more than 600 degrees C by inserting into the required matrix.