Figure 4
The residual strain as a function of depth in the top coat and the bond coat in the as-received sample and the samples heat treated at 1423 K. (a) The as-received sample, (b) the sample heat treated for 40 h, (c) the sample heat treated for 91 h, (d) the sample heat treated for 160 h and (e) the sample heat treated for 190 h. It can be seen that in all of the top coats the residual strain generally increases from the surface to the interface in a nonlinear trend, and in all of the bond coats the residual strain is generally tensile. |