Patent ID: 7579094
Filing Date: 2009-08-25
Classification: F01D,F05C,F05D,Y02T,Y10T

Abstract:
1. A ceramic matrix composite rotatable turbine engine component, the rotatable turbine engine component having a direction of maximum tensile stress during normal engine operation, wherein normal engine operation includes rotation of the rotatable turbine engine component comprising: a plurality of biased ceramic plies, each biased ply comprising ceramic fiber tows, the tows woven in a first warp direction and a second weft direction, the second weft direction lying at a preselected angular orientation with respect to the first warp direction, wherein a greater number of tows are woven in the first warp direction than in the second weft direction, and wherein a number of tows in the second weft direction allows the biased plies to maintain their structural integrity when handled; the plurality of biased plies laid up in a preselected arrangement to form the component, wherein a preselected number of the plurality of biased plies are oriented such that the orientation of the first warp direction of the preselected number of biased plies lie about in the direction of maximum tensile stress during normal engine operation; a coating applied to the plurality of biased plies, the coating selected from the group consisting of BN, SiC, and combinations thereof; and a ceramic matrix material lying in interstitial regions between the tows of each biased ply and the interstitial region between the biased plies.