Determining Anisotropic Young’s Modulus of Ceramic Coatings by the Relative Method

Young’s moduli of coatings in the both perpendicular and horizontal directions were evaluated by the relative method, which are determined via establishing the relationship between the uncoated specimen and the coated specimen, with different coating positions during the loading tests. Compared with other traditional methods, the relative method is much simpler in both sample pretreatment and testing device. The validity and reliability of this method has been demonstrated by the beam specimens with CVD-SiC coatings, which will be applied to establish and improve a simple and reliable evaluation system for the anisotropy of coating modulus.