| abstract |
The blades of the fluid machine are formed in such a way that the permissible stress is not exceeded at a given load on the fluid machine and nevertheless the fluid machine can be operated with high efficiency. To that end, the blades (1) of the fluid machine (3) are at least partially formed of a porous material, in particular a foamed metal (21). The porous material (5) is used, for example, for the blade (7) of the bucket (1). Particularly, a foam metal of a nickel or cobalt base alloy is suitable for use in a gas turbine or a steam turbine having a steam temperature exceeding 600 ° C. |