What is claimed is:
1. A turbine blade for a gas turbine engine comprising a superalloy substrate defining an airfoil, a root, and a platform located between the blade and root, the platform has an underside adjacent the root, and a corrosion resistant noble metal-containing aluminide coating on the underside of the platform and blade neck.
2. The turbine blade of claim 1, wherein the aluminide coating is a platinum aluminide coating.
3. The turbine blade of claim 1, wherein the coating contains about 11-60 wt. % platinum, balance primarily aluminum and nickel.
4. The turbine blade of claim 1, wherein the coating contains about 25-55 wt. % platinum, balance primarily aluminum and nickel.
5. The turbine blade of claim 1, wherein the coating contains about 30-45 wt. % platinum, balance primarily aluminum and nickel.
6. The turbine blade of claim 1, wherein the coating has a nominal thickness of less than about 0.005.
7. The turbine blade of claim 1, further comprising a platinum aluminide layer applied over an existing aluminide coating.
8. The turbine blade of claim 1 wherein the substrate is composed of a directionally solidified nickel-based alloy.
9. The turbine blade of claim 1 wherein the substrate is comprised of a columnar grain nickel-based alloy.
10. The turbine blade of claim 1 wherein the substrate is comprised of a single crystal nickel-based alloy.
11. A superalloy gas turbine component which operates in an environment with primary gas path temperatures in excess of 1000 C., the component having a first, exposed portion which is directly exposed to hot gas path, a second, shielded section which is shielded from direct exposure to the hot gas path, and a third section between the exposed and shielded portions, the improvement which comprises a corrosion resistant platinum aluminide coating applied to the third section.
12. The component of claim 11 comprising a turbine blade, the first portion forming an airfoil, the section portion forming a root, and the third section forming a platform, the improvement comprising a corrosion resistant platinum aluminide coating applied to the underside of the platform.
13. The component of claim 11, wherein the components is composed of a directionally solidified superalloy material.
14. The component of claim 11, wherein the coating has a nominal thickness of less than about 0.005.
15. The component of claim 11, wherein the coating further comprises varying levels of hafnium, silicon andor yttrium.
16. The turbine blade of claim 1, wherein at least a portion of the component has an applied coating having a composition different from that applied to the airfoil surface.
17. The turbine blade of claim 1, wherein at least a portion of the airfoil is coated by a diffusion aluminide and the underplatform surface is coated with a noble metal-containing aluminide.
18. The turbine blade of claim 1, wherein the coating further comprises yttrium, hafnium andor silicon.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus having data flow graph (DFG) processor, which processes a DFG necessary for configuration of a reconfigurable circuit capable of changing functions, comprising:
a central processing unit;
a dividing unit which divides a program describing target operations into two or more subprograms;
a DFG generating unit which generates, using the central processing unit, a plurality of DFGs corresponding to the two or more subprograms in accordance with a description in the program, the DFGs representing dependency in execution between the target operations of the program carried out in sequence, wherein the generating unit generates, when a branching process is detected in the program, a first DFG of the plurality of DFGs indicating a process before the branching process, and a second DFG of the plurality of DFGs indicating a process after the branching process, and at least either one of the first DFG or the second DFG includes a process for determining a destination of the branching process;
a flow data generating unit which generates flow data indicating the order of execution of the DFGs based on the generation by the DFG generating unit; and
a configuration data generating unit which converts the DFGs into corresponding configuration data for mapping the DFGs into the reconfigurable circuit and defining the functions in the reconfigurable circuit.