C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/87 (2006.01) C04B 37/00 (2006.01) C04B 41/52 (2006.01) C04B 41/89 (2006.01) C04B 41/91 (2006.01)
Patent
CA 2514898
A liquid composition containing a ceramic precursor polymer and a refractory solid charge is applied to the surface of the part to be treated. After cross- linking, the polymer is transformed into a ceramic by heat treatment and a ceramic deposit is then formed by chemical infiltration in a vapor phase. The surface of the part is leveled prior to chemical infiltration in a vapor phase in order to return to the initial geometry of the composite material part to be formed, by chemical infiltration in a vapor phase, a deposit obturating the residual microporosity on the leveled surface of the part.
On applique sur la surface de la pièce à traiter une composition liquide contenant un polymère précurseur de céramique et une charge solide réfractaire. Après réticulation, le polymère est transformé en céramique par traitement thermique et un dépôt de céramique est ensuite formé par infiltration chimique en phase vapeur. Avant l'étape d'infiltration chimique en phase vapeur, la surface de la pièce est arasée pour revenir à la géométrie initiale de la pièce en matériau composite de manière à former, par infiltration chimique en phase vapeur, un dépôt qui obture la microporosité résiduelle à la surface arasée de la pièce.
Sim & Mcburney
Snecma Propulsion Solide
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