Study of some physical and mechanical properties of the flame ‎thermal spray method to produce compounds with (AL-WC) ‎system to protect turbine blades

The hardness test was carried out for both Porosity and adhesion ‎strength at weight ‎ratios % (5,10,15,20,25,30). Before conducting the sintering, the highest ‎value of hardness was ‎‎(153Hv) and the lowest value of porosity was (18%) and the highest value ‎of adhesion strength ‎was (23 MPa) were obtained at the percentage of reinforcement is (25%). ‎Sintering at (1000°C) was ‎carried out for two hours. Then the hardness, porosity and adhesive ‎strength were retested, ‎where we note the effect of sintering on each of the hardness, porosity and ‎adhesion strength and the increase in the hardness value and adhesion strength to ‎‎(178Hv) and (33 MPa), ‎respectively. This test is resulted with a decrease in the porosity to (7%) and at the same ‎reinforcement ratio of (25%). ‎Also, X-ray diffraction (XRD) and scanning electron microscopy ‎‎(SEM) were examined after ‎sintering. You have the phases and these phases proved to us the ‎improvement of the physical ‎and mechanical properties of the material to reach the best at 25%. As ‎for the SEM results, it was ‎found that there was weakness and cracking in the coating layers at the ‎low reinforcement ratios, ‎while the physical and mechanical properties improved with the increase ‎in the reinforcement ratios ‎to reach the best at 25%.‎