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Full-field energy-dispersive powder diffraction imaging using laboratory X-rays

DOI: 10.1107/S1600576715000801 DOI Help

Authors: Christopher Egan (University of Manchester) , Simon Jacques (Research Complex at Harwell) , Matthew Wilson (Rutherford Appleton Laboratory, Science & Technology Facilities Council (STFC)) , Matt Veale (STFC) , Paul Seller (STFC) , Philip Withers (University of Manchester) , Robert Cernik (University of Manchester/UMIST)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Applied Crystallography , VOL 48 , PAGES 269 - 272

State: Published (Approved)
Published: February 2015
Diamond Proposal Number(s): 5897

Abstract: A laboratory instrument with the ability to spatially resolve energy-dispersed X-ray powder diffraction patterns taken in a single snapshot has been developed. The experimental arrangement is based on a pinhole camera coupled with a pixelated spectral X-ray detector. Collimation of the diffracted beam is defined by the area of the footprint of a detector pixel and the diameter of the pinhole aperture. Each pixel in the image, therefore, contains an energy- dispersed powder diffraction pattern. This new X-ray imaging technique enables spatial mapping of crystallinity, crystalline texture or crystalline phases from within a sample. Validation of the method has been carried out with a back-to-back comparison with crystalline texture mapping local to a friction stir weld in an aluminium alloy taken using synchrotron radiation.

Subject Areas: Technique Development, Materials, Physics

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

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