Brittle Materials Design, High Temperature Gas Turbine

The 'Brittle Materials Design, High temperature Gas Turbine' program objective is to demonstrate successful use of brittle materials in demanding high temperature structural applications. A small vehicular gas turbine engine and a static test rig, each using uncooled ceramic components, wi...

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Bibliographic Details
Main Authors: McLean, Arthur F, Fisher, Eugene A, Bratton, Raymond J, Miller, Donald G
Format: Report
Language:English
Subjects:
BRITTLE MATERIALS
BRITTLENESS
CERAMIC MATERIALS
Ceramics, Refractories and Glass
GAS TURBINES
HEAT RESISTANT MATERIALS
HIGH TEMPERATURE
Jet and Gas Turbine Engines
MECHANICAL PROPERTIES
NONDESTRUCTIVE TESTING
SILICON CARBIDES
SILICON NITRIDES
TURBINE STATORS
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Summary:The 'Brittle Materials Design, High temperature Gas Turbine' program objective is to demonstrate successful use of brittle materials in demanding high temperature structural applications. A small vehicular gas turbine engine and a static test rig, each using uncooled ceramic components, will be utilized in this iterative design and materials development program. Both the contractor, Ford Motor Company, and the subcontractor, Westinghouse Electric Corporation, have had in-house research programs in this area prior to this contract. In the vehicular turbine project, design work was completed and tooling ordered for a revised Design D silicon nitride duo-density turbine rotor using radially stacked airfoil sections which reduced blade stresses by 16%. Press bonding of duo-density rotors continues to show excellent bonding between the hot pressed hub and the reaction sintered blade ring when hub-forming and bonding are accomplished in the same operation. IN the stationary turbine project, a decision was made to de-emphasize the 30 Mw size turbine size turbine demonstration of ceramic stator vanes and to focus available effort on static rig testing. Prepared in cooperation with Westinghouse Electric Corp., Pittsburgh, Pa.