In situ compression of micropillars under coherent X-ray diffraction: a case study of experimental and data-analysis constraints.

ABSTRACT: Micropillar compression is a method of choice to understand mechanics at small scale. It is mainly studied with electron microscopy or white-beam micro-Laue X-ray diffraction. The aim of the present article is to show the possibilities of the use of diffraction with a coherent X-ray beam. InSb micropillars in epitaxy with their pedestals (i.e. their support) are studied in situ during compression. Firstly, an experiment using a collimated beam matching the pillar size allows determination of when the sample enters the plastic regime, independently of small defects induced by experimental artefacts. A second experiment deals with scanning X-ray diffraction maps with a nano-focused beam; despite the coherence of the beam, the contributions from the pedestal and from the micropi

SUBMITTER: Godard P 

PROVIDER: S-EPMC10077849 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature