Microstructures of thermal spray ceramic coatings are formed during deposition but they are highly sensitive to the process conditions. At Stony Brook, In and Ex-Situ Property (ICP, ECP) devices were developed to measure the substrate curvature and temperature. ICP can be used to monitor the real-time deposition state of coating during fabrication while ECP makes measurements in a well-controled environement after fabrication. These measurements are processed to estimate its property (e.g., elastic modulus) of ceramic coatings. In order to accomplish this, model analyses and finite element simulations were carried out to establish the relationship between the mechanical properties of coatings and the measured curvatures and temperature. The study shows a certain correlation between the ICP measurements and elastic modulus while more precise nonlinear property of TS coating can be obtained with the thermal cycle ECP tests. The both procedures are advantageous since they do not require complex post analysis (e.g., indentations, SEM, etc.) to estimate the mechanical property of the coatings.
展开▼
