Dark-field hyperspectral X-ray imaging

作者：Egan Christopher K^*; Jacques Simon D M; Connolley Thomas; Wilson Matthew D; Veale Matthew C; Seller Paul; Cernik Robert J

来源：Proceedings of the Royal Society A-Mathematical Physical and Engineering Sciences, 2014, 470(2165): 20130629.

DOI：10.1098/rspa.2013.0629

• energy-dispersive X-ray diffraction
• X-ray imaging
• computed tomography
• materials characterization

In recent times, there has been a drive to develop non-destructive X-ray imaging techniques that provide chemical or physical insight. To date, these methods have generally been limited; either requiring raster scanning of pencil beams, using narrow bandwidth radiation and/or limited to small samples. We have developed a novel full-field radiographic imaging technique that enables the entire physio-chemical state of an object to be imaged in a single snapshot. The method is sensitive to emitted and scattered radiation, using a spectral imaging detector and polychromatic hard X-radiation, making it particularly useful for studying large dense samples for materials science and engineering applications. The method and its extension to three-dimensional imaging is validated with a series of test objects and demonstrated to directly image the crystallographic preferred orientation and formed precipitates across an aluminium alloy friction stir weld section.

• 出版日期2014-5-8