A gas turbine engine includes a rotatable component and a non-rotatable component. A seal is carried on one of the rotatable component or the non-rotatable component to provide sealing there between. The seal includes a geopolymer seal element.

The invention relates to the production of a composite material of a lobed structure (10) of a flow mixer which comprises a portion having a plurality of lobes (17, 19). For this purpose, a fibrous preform containing a resin will be produced in a simple geometric configuration of developable revolution. This is an intermediate state. By exploiting the thermoformable or thermosetting nature of the resin, the geometry of this intermediate preform is modified to deform it with limited offsets towards the final geometry.

A gas turbine engine includes a rotatable component and a non-rotatable component. A seal is carried on one of the rotatable component or the non-rotatable component to provide sealing there between. The seal includes a geopolymer seal element.

A nozzle assembly is disclosed, including a CMC nozzle shell, a nozzle spar, and an endwall. The CMC nozzle shell includes a CMC composition and an interior cavity. The nozzle spar is partially disposed within the interior cavity and includes a metallic composition, a cross-sectional conformation, a plurality of spacers protruding from the cross-sectional conformation, the plurality of spacers contacting the CMC nozzle shell, and a spar cap. The endwall includes at least one surface in lateral contact with the spar cap and maintains a lateral orientation of the CMC nozzle shell and the nozzle spar relative to the endwall. The lateral orientation maintains a predetermined throat area of the nozzle assembly. A method for forming the nozzle assembly includes inserting the nozzle spar into the interior cavity, rotating the CMC nozzle shell and the nozzle spar laterally relative to the endwall, and maintaining the lateral orientation.

An impeller for a rotary machine includes: a base material of the impeller comprising Al or an Al alloy; and an electroless plating layer disposed so as to cover the base material, the electroless plating layer forming a surface layer of the impeller. The electroless plating layer comprises a NiP based alloy having an amorphous structure, the NiP based alloy having a P content rate of not less than 5 wt % and not more than 11 wt % in the electroless plating layer.

A steam turbine member has suppressed adhesion of scale for a long time without deterioration of corrosion resistance and the like of a turbine. A steam turbine member includes a hard layer 2 and a deposited amorphous carbon film 3 on a base material 1, in that order.

An airfoil includes an airfoil body and a sheath. The airfoil body includes a first metallic material and the sheath includes a second metallic material. An interface connects the sheath to the airfoil body such that the sheath covers a forward edge of the airfoil body to define an airfoil leading edge. The interface includes bulk metallic glass bonding the sheath to the airfoil body.

An airfoil includes an airfoil body and a sheath. The airfoil body includes a first metallic material and the sheath includes a second metallic material. An interface connects the sheath to the airfoil body such that the sheath covers a forward edge of the airfoil body to define an airfoil leading edge. The interface includes bulk metallic glass bonding the sheath to the airfoil body.