Effect Of Spraying Parameters On The Strain Of Plasma Sprayed YSZ Coatings Measured By The Digital Image Correlation Method During The Tensile Test

Effect of plasma spraying parameter on the stain of plasma sprayed YSZ coatings is investigated by changing the spraying power and spraying distance. The porosity is measured through using image processing method. The stain field of coatings is calculated and characterized through using the digital image correlation (DIC) software system. It can be found that the porosity of YSZ coatings increases with the increment of spraying distance and the decrement of spraying power. The strain on the far field of the cracking tip shows a fluctuation tendency when the tensile forces increase. The tendency of the strain changes inversely with the spraying parameters, compared with that of porosity.