An extinction-free technique for pole density measurements of textures by XRD

作者：Tomov I^*; Vassilev S; Avdeev G

来源：Bulgarian Chemical Communications, 2011, 43(2): 334-338.

• extinction
• texture
• diffraction pole figures
• texture goniometer

Pole density is a fundamental parameter of the diffraction pole figures used for calculation of orientation distribution functions that characterize the physical properties of textures. To gain accuracy and, hence, physical reality of the data, an approach is elaborated to derive experimental pole-density values, which are free of extinction effects. The approach is based on the intrinsic invariability of the empirical extinction coefficient k at a series of levels of interaction of the diffraction process. The invariability of k is a precondition for nullifying the extinction effects by equating couple of its expressions defined with the intensities measured at the same series of the levels of interaction. A nickel sample representing < 100 > texture component is investigated. The resultant derived series of data for the distribution of pole density P of the {200} diffraction pole figure is in exact accord with kinematic theory.

• 出版日期2011