Treatment of Turbine Blades via Cr2O3-Ni5%Al System Using Plasma Thermal Spraying

A plasma thermal spraying method was used for the purpose of coating pre-prepared surfaces turbine blades. Chromium oxide (Cr2O3) as a matrix reinforced with metal material Ni-5%Al at rates 10, 20, 30, 40 and 50. The cermet powders were stirred one hour then to coat bases steel (316L). spray distance 8cm applied, binding Ni-22%Cr-10%Al-1%Y sprayed thickness 100μm. Then, 300–350μm final samples prepared 400–450μm. produced sintered 900°C an half underwent hardness test, which gave best after sintering reinforcement rate 50% by 612Hv. lowest porosity value above obtained 3.88%. results adhesive strength 31.5 MPa same reinforcement. scanning electron microscope (SEM) showed that there weakness cracking in layers low ratios. However, mechanical physical properties improved increase ratios reach highest 50%. KEYWORDS Adhesion force, ceramites, microscope, Vickers