Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Office National D'etudes Et De Recherches Aerospatiales (onera)

Gerard Philippe Gauthier

Ludovic Edmond Molliex

Gilles J Bessenay

Jean-Claude Robert Berthelemy

Daniel G Girault

Serge Rene Morreale

Joel M Benoit

Susanne Obradovic

Yves Emile Ange Laurent

Olivier Henri Sudre

Patrick Victor Verdier

Alain Robert Perroux

Laurent Gille

Composite material comprising a CAS+BAS vitroceramic matrix reinforced with SiC fibers and exhibiting a small difference between the thermal expansion coefficients of the matrix and the fibers is obtained by using a matrix having a BaO/(BaO+CaO) molar ratio of between 25% and 55% and predominant phases of triclinic anorthite and monoclinic celsian.

Composite material containing a fibre reinforced vitroceramic matrix and

A blank consisting of a spirally wound fiber for use in the manufacture of a fiber reinforced article of composite material is made by winding the fiber onto a helical track on the surface of a frusto-conical spindle, covering the wound fiber with a thermoplastic binder which sets to form a frusto-conical shell encasing the fiber, removing the shell from the spindle and placing the shell with its base on a plate, and heating the shell starting from its base so as to soften it and cause it to progressively collapse onto the plate to form a disc comprising a spirally wound fiber. If necessary the collapse of the shell may be assisted by pressing on the shell in a direction towards the plate.

Method of making a disc consisting of a spirally wound fibre

An apparatus for producing a circular metal article reinforced by fibres in selected parts of its cross-section is described in which a metal blank of the article is formed and provided with at least one annular groove opening in the axial direction, preforms of reinforcing fibre and filler metal are placed in the groove which is then closed by a metal plug, and the assembly is isothermally forged to produce the article in a single forging step which serves to compress the preforms, weld the assembly together, and shape the article. Such articles may be used for machining high performance rotors for turbojet engines.

Method of producing a circular fibre-reinforced metal article, and

A method of producing a circular metal article reinforced by fibres in selected parts of its cross-section is described in which a metal blank of the article is formed and provided with at least one annular groove opening in the axial direction, preforms of reinforcing fibre and filler metal are placed in the groove which is then closed by a metal plug, and the assembly is isothermally forged to produce the article in a single forging step which serves to compress the preforms, weld the assembly together, and shape the article. Such articles may be used for machining high performance rotors for turbojet engines. Apparatus for use in the method is also described.

A process for assembling at least two parts made from a composite material incorporating a ceramic or vitroceramic matrix reinforced by ceramic fibers. A continuous connection between these parts is achieved by approaching two of the parts along their respective edges to be assembled, forming a joint between the two parts by sewing with a tie or link of ceramic fibers from each of the parts to be assembled and heating the joints by a heating device employing a powerful and extremely localized heating until the two parts are welded together.

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Saint Michel Sur Orge, France

Gerard Philippe Gauthier