title: Fast X-ray microdiffraction techniques for studying irreversible transformations in materials.
abstract: A pair of techniques have been developed for performing time-resolved X-ray microdiffraction on irreversible phase transformations. In one technique capillary optics are used to focus a high-flux broad-spectrum X-ray beam to a 60 µm spot size and a fast pixel array detector is used to achieve temporal resolution of 55 µs. In the second technique the X-rays are focused with Kirkpatrick-Baez mirrors to achieve a spatial resolution better than 10 µm and a fast shutter is used to provide temporal resolution better than 20 µs while recording the diffraction pattern on a (relatively slow) X-ray CCD camera. Example data from experiments are presented where these techniques are used to study self-propagating high-temperature synthesis reactions in metal laminate foils.
authors.affiliation: Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA.
authors.forename: Stephen T
authors.initials: ST
authors.lastname: Kelly
authors.forename: Jonathan C
authors.initials: JC
authors.lastname: Trenkle
authors.forename: Lucas J
authors.initials: LJ
authors.lastname: Koerner
authors.forename: Sara C
authors.initials: SC
authors.lastname: Barron
authors.forename: Nöel
authors.initials: N
authors.lastname: Walker
authors.forename: Philippe O
authors.initials: PO
authors.lastname: Pouliquen
authors.forename: Mark W
authors.initials: MW
authors.lastname: Tate
authors.forename: Sol M
authors.initials: SM
authors.lastname: Gruner
authors.forename: Eric M
authors.initials: EM
authors.lastname: Dufresne
authors.forename: Timothy P
authors.initials: TP
authors.lastname: Weihs
authors.forename: Todd C
authors.initials: TC
authors.lastname: Hufnagel