INTEGRAL TEXTILE STRUCTURE FOR 3-D CMC TURBINE AIRFOILS

摘要

An integral textile structure for 3-D CMC turbine airfoils includes top and bottom walls made from an angle-interlock weave, each of the walls comprising warp and weft fiber tows. The top and bottom walls are merged on a first side parallel to the warp fiber tows into a single wall along a portion of their widths, with the weft fiber tows making up the single wall interlocked through the wall's thickness such that delamination of the wall is inhibited. The single wall suitably forms the trailing edge of an airfoil; the top and bottom walls are preferably joined along a second side opposite the first side and parallel to the radial fiber tows by a continuously curved section in which the weave structure remains continuous with the weave structure in the top and bottom walls, the continuously curved section being the leading edge of the airfoil.

主权项

1. A ceramic matrix composite (CMC) structure formed from an integral 3-D preform of reinforcing fibers, comprising:
a top wall made from an angle-interlock weave; and a bottom wall made from an angle-interlock weave, each of said walls comprising warp and weft fiber tows; said top and bottom walls merged on a first side parallel to the warp fiber tows into a single wall along a portion of their widths, said weft fiber tows making up said single wall interlocked through the thickness of said single wall such that delamination of said single wall is inhibited.