Modification of Plasma Spray Parameters of NiCrAlY Nano Particles for Achievement of Nano Structure TBC

In this research to rich nano structure bond coat uses in TBC, firstly with ball milling process the micron size NiCrAlY convert to nano particle size NiCrAlY, and after agglomeration nano particle NiCrAlY, powder were deposited upon stainless steel 420 substrate with atmospheric plasma spray (APS) process. Injection distance of powder, hydrogen rate, and utilizationof argon shroud parameters were investigated for suitable deposition agglomeration nano NiCrAlY particles. The result shown, utilization of argon shroud in nano NiCrAlY bond coat was decreased oxidation salient. Also increase of injection distance of powder and hydrogen rate cause to oxidation enhancement. Moreover the nano particle NiCrAlY in comparison micron NiCrAlY toward oxidation was very tender.