Patent ID: 7527469

Claim:
A transition-to-turbine seal for sealing a gap between an outlet of a gas turbine engine transition and a row 1 vane segment, the transition comprising a radially extending exit rail as its downstream end, and the turbine row 1 vane segment comprising a radially disposed leading edge rail as its upstream end, the transition-to-turbine seal comprising: a transition exit seal adapted for fixed attachment to a downstream radial surface of the radially extending exit rail of the transition outlet; a stage-1 seal cooperatively associated with the transition exit seal to provide a first sealing function with an axial freedom of movement, and a wear surface adapted for sliding radial contact with a surface of the radially disposed leading edge rail of the row 1 vane segment to provide a second sealing function, wherein the wear surface comprises a material selected to promote preferential wear of the wear surface relative to wear of the surface of the radially disposed leading edge rail of the row 1 vane segment during sliding contact there between.