Induction Heated Sintering and Mechanical Properties of Electrosprayed Nano YSZ

Abstract

In this study, YSZ nanopowder for gas turbine blades was used to deposit a film on Ni-based superalloy with electrospray deposition method. Then, the coated substrates were sintered with high-frequency induction heated sintering system which is yet not so popular in this field. Effect of nanosized YSZ and sintering method on the crystal structure and microstructures of coated materials were studied by X-ray diffraction and scanning electron microscopy. The best parameters for ESD of YSZ in 2-propanol were achieved at an applied potential of 7 kV, a flow rate of 0.05 mL/min and at aduration of 15 min. Results showed that YSZ coating was highly dense with non-cracked surface, uniform in thickness at 15 min total sintering time. Surface roughness, microhardness, and resistance to friction were measured as 0.41 m, 348 HV and 0.14, respectively.