The Influence of NiCrAlY Coatings Prepared by LPPS and EB-PVD on the Damping Properties of 1Cr18Ni9Ti Alloy

摘要

The influence of NiCrAlY coatings prepared by low-pressure plasma-sprayed (LPPS) and electron beam physical vapor deposition (EB-PVD) respectively on the damping properties of 1Cr18Ni9Ti alloy were investigated. The results shown that, compared to uncoated sample, the damping capacity of NiCrAlY coated samples has been improved significantly. The Q~(-1) value of the coated samples was approximately 0.008～0.01 in range of 20～300°C.The interface adhesion state has a distinct effect on the coatings' damping characteristics. The dynamic Young's modulus of the coated samples decreased compared to the uncoated substrate; and LPPS coated sample's dynamic modulus was lower than that of EB-PVD coated sample. Such difference resulted from different coating microstructure and interface adhesion morphology.