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A wedge-type diffuser includes a diffuser floor and a plurality of wedge-shaped vanes. The wedge-shaped vanes extend from the diffuser floor and have a top surface, a leading edge and a trailing edge. Each of the wedge-shaped vanes has a slot extending from the trailing edge toward the leading edge.

A wedge-type diffuser includes a diffuser floor and a plurality of wedge-shaped vanes. The wedge-shaped vanes extend from the diffuser floor and have a top surface, a leading edge and a trailing edge. Each of the wedge-shaped vanes has a slot extending from the trailing edge toward the leading edge.

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1. An assembly comprising: a wedge-type diffuser including: a diffuser floor;a plurality of wedge-shaped vanes extending from the diffuser floor and including a top surface, a leading edge and a trailing edge, wherein each of the wedge-shaped vanes has a slot extending from the trailing edge toward

1. An assembly comprising: a wedge-type diffuser including: a diffuser floor;a plurality of wedge-shaped vanes extending from the diffuser floor and including a top surface, a leading edge and a trailing edge, wherein each of the wedge-shaped vanes has a slot extending from the trailing edge toward the leading edge; anda plurality of bolt holes in each of the wedge-shaped vanes extending from the top surface toward the diffuser floor;wherein each of the slots intersects one of the plurality of bolt holes. 2. The assembly of claim 1, wherein each slot is substantially centered on the trailing edge, effectively forming two legs at the trailing edge that define the slot. 3. The assembly of claim 1, wherein the wedge-shaped vanes are substantially identical, arranged about a centerline axis, and tilted with respect to the centerline axis. 4. The assembly of claim 1, wherein the diffuser floor includes a radially extending inner platform from which the wedge-shaped vanes extend and includes a longitudinally extending outer platform from which a plurality of straightener vanes extend. 5. The assembly of claim 1, wherein the wedge-type diffuser further includes a plurality of straightener vanes extending from the diffuser floor radially outward from the wedge-shaped vanes. 6. The assembly of claim 1, wherein the trailing edge is wider than the leading edge, and wherein each wedge-shaped vane tapers substantially continuously from the trailing edge to the leading edge. 7. The assembly of claim 1, wherein each slot is sized so as to minimize a trailing edge aerodynamic wake created during operation. 8. The assembly of claim 1, wherein each slot extends along an entire length of the trailing edge from the top surface of each wedge-shaped vane to the diffuser floor. 9. The assembly of claim 8, wherein an interface between each wedge-shaped vane and the diffuser floor is filleted at the trailing edge and at the slot. 10. The assembly of claim 1, and further comprising: a shroud attached to the wedge-type diffuser such that the wedge-shaped vanes are positioned between the shroud and the diffuser floor. 11. The assembly of claim 10, and further comprising: a plurality of bolts extending through the bolt holes in each of the wedge-shaped vanes for connecting the wedge-type diffuser to the shroud. 12. The assembly of claim 11, wherein each slot extends from the trailing edge to the bolt hole. 13. The assembly of claim 12, wherein a portion of each slot has a width less than a diameter of the bolt hole. 14. The assembly of claim 11, wherein each slot extends from the trailing edge through the bolt hole. 15. A gas turbine engine comprising: a rotor assembly comprising: a compressor impeller; anda turbine connected to the compressor impeller by a shaft;a combustor positioned along a gas flow path between the compressor impeller and the turbine;a wedge-type diffuser positioned along the gas flow path between the compressor impeller and the combustor, the wedge-type diffuser including: a diffuser floor; anda plurality of wedge-shaped vanes extending from the diffuser floor and including a top surface, a leading edge and a trailing edge, wherein each of the wedge-shaped vanes has a slot extending from the trailing edge toward the leading edge;a shroud attached to the wedge-type diffuser such that the plurality of wedge-shaped vanes are positioned between the shroud and the diffuser floor; anda plurality of bolts extending through bolt holes in each of the wedge-shaped vanes configured to connect the wedge-type diffuser to the shroud;wherein each of the slots intersects one of the plurality of bolt holes. 16. The gas turbine engine of claim 15, wherein the shaft includes a spline for transmitting power to drive one or more aircraft components. 17. An assembly comprising: a wedge-type diffuser including: a diffuser floor; anda plurality of wedge-shaped vanes extending from the diffuser floor and including a top surface, a leading edge and a trailing edge, wherein each of the wedge-shaped vanes has a slot extending from the trailing edge toward the leading edge; anda plurality of bolt holes in each of the wedge-shaped vanes extending from the top surface toward the diffuser floor;wherein each of the slots intersects one of the plurality of bolt holes and has a width less than a diameter of the bolt hole.