There are many difficulties in measuring thermal residual stress in thermal barrier coatings

because of their microstructure and microdeformation.Phase-shift moire interferometry is provided which can precisely measure the deformation of solid bodies under various loading conditions.The fundamental theory and experimental technology of the phase-shift moire image-processing technique are introduced.By combining it with relaxation method

a new technique for measuring thermal residual stress is proposed.With the aid of high temperature moire gratings

the distributions of thermal residual stresses in the EB-PVD(electronic beam-physic vapour deposition)coating has been measured

and compared with those other of methods.