An apparatus and method for evaluating thermal barrier coating material on
a surface of a part or component that is subjected to transient
heat/thermal cycles. A pulsed laser heating apparatus that preferably uses
lenses and optical fiber focusing components simulates conditions of brief
heating on the test specimen. In the method of the invention, the temporal
shape, spatial distribution, and total energy of the laser pulse are
designed to produce a spot of uniform illumination and heat absorption on
the test specimen that closely approximates the thermal loading that the
specimen is expected to receive during use. The test specimen is then
examined for thermally induced changes.
Current U.S. Class: | 374/5; 374/45; 374/46; 374/57 |
Current CPC Class: |
G01N 3/317 (20130101); G01N 3/56 (20130101); G01N 3/60 (20130101); G01N 2203/0057 (20130101); G01N 17/004 (20130101) |
Current International Class: |
G01N 3/30 (20060101); G01N 3/317 (20060101); G01N 3/56 (20060101); G01N 3/60 (20060101); G01N 17/00 (20060101); G01N 021/00 () |
Field of Search: |
;374/5,134,130,131,132,45-46,57
|