An Approach to Nondestructive Investigation of The Structure of The Structure of Heat-resistant, Solid-state Materials by Simultaneous Application of X-ray Diffractometry And Optical Heating

摘要

The equipment used in this non-destructive testing (NDT) of surface and sub-surface areas of a heat-resistant material combines as optical heating a source of an infra-red laser-light and a powder diffractometar, specifically the General Area Diffraction Detection System. These parts of experimental site are used to excite the material, produce a local temperature gradient as well as observe the heat-caused changes, respectively. Both, the x-ray beam and the laser-beam are simultaneously directed to the surface of the examined object, where the detection of any changes occurring on its surface structure can by obtained. In a multi-wire area detector, diffracted x-ray beams as constructive interferences coming from an object's surface will be recorded. Due to this procedure, it is possible to registered structural changes on the surface, based on the heat propagation within the heat-resistant material being examined. The application of this method allows the detection of any impurity present either on surface or within material matrix, due to the fluctuations caused by the temperature gradient.