Patent ID: 7378132

Claim:
A method for preparing a coated high pressure turbine blade for assembly in a gas turbine engine comprising the steps of: providing a suitable turbine blade having a surface to be coated; preparing the turbine blade surface for cold gas dynamic spraying; depositing a first coating layer on the turbine blade surface by cold gas dynamic spraying a powder composition of pre-alloyed metals wherein the pre-alloyed metals in the powder composition comprise Element Range Weight % Co about 0-about 35 Cr about 10-about 25 Fe about 0-about 35 Al about 6-about 20 Pt about 0-about 35 Hf about 1.0-about 5.0 Si about 1.0-about 6.0 Nb about 0-about 15 Zr about 0-about 5.0 Ta about 0-about 5.0 Re about 0-about 5.0 Ru about 0-about 5.0 B about 0-about 1.0 C about 0-about 0.2 Y about 0.1-about 0.7 Ni remainder; and repeating the step of depositing to form a second coating layer having the same metallic composition as the first layer, wherein one of the first and second coating layers includes Pt, and the other of the first and second coating layers is Pt-free.