This relates to a turbine blade comprising a preformed fibrous fabric of fibres consisting of carbon, silicon carbide or rhenium fixed with a binder resin, and wherein the preformed and fixed fibrous fabric is coated and infiltrated, respectively, with B.sub.4C, wherein the preformed fibrous fabric that has been fixed and coated and infiltrated, respectively, with B.sub.4C further has a multilayer coating consisting of at least one layer of silicon carbide and at least one layer of a metal boride, a metal nitride or a metal carbide, and wherein an oxide ceramic is applied over the multilayer coating. The turbine blade is resistant to high temperatures and is particularly well suited for use in a gas turbine. Methods for producing the turbine blade are also described.

Disclosed is a coated ceramic fiber including a zirconium interface coating layer deposited on the ceramic fiber, a zirconium dioxide interface coating layer adjacent to the zirconium interface coating layer, and an additional interface coating layer adjacent to the zirconium dioxide interface coating layer, wherein zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Disclosed is a coated ceramic fiber including a zirconium interface coating layer deposited on the ceramic fiber, a zirconium dioxide interface coating layer adjacent to the zirconium interface coating layer, and an additional interface coating layer adjacent to the zirconium dioxide interface coating layer, wherein zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

A method for uniformly distributing particulate matter in a fiber reinforcement of a CMC material, comprising: providing at least one preform of at least one fiber reinforcement; infiltrating the preform with at least one slurry containing at least one particulate material and at least one solvent to form at least one slurry infiltrated preform comprising the particulate material; freezing the slurry infiltrated preform containing the particulate material to form at least one frozen slurry infiltrated preform containing the particulate material; sublimating the frozen slurry infiltrated preform including the particulate material to form at least one structural support comprising the particulate material uniformly distributed thereupon within at least one sublimated slurry infiltrated preform; and melt-infiltrating with at least one metal, at least one metalloid, at least one metal alloy, or at least one metalloid alloy, the sublimated slurry infiltrated preform containing the structural support to form a melt-infiltrated CMC material.