Laue microdiffraction on polycrystalline samples above 1500 K achieved with the QMAX-µLaue furnace

Ravi Raj Purohit Purushottam Raj Purohit (1) , Daniel Fowan (2) , Stephan Arnaud (3) , Nils Blanc (3) , Jean-Sébastien Micha (4) , René Guinebretiere (2) , O Castelnau (5)

1 MEM - Modélisation et Exploration des Matériaux
2 IRCER - Institut de Recherche sur les CERamiques
3 NEEL - CRG - CRG & Grands instruments
4 STEP - Synthèse, Structure et Propriétés de Matériaux Fonctionnels
5 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux

X-ray Laue microdiffraction aims to characterize microstructural and mechanical fields in polycrystalline specimens at the sub-micrometre scale with a strain resolution of ∼10−4. Here, a new and unique Laue microdiffraction setup and alignment procedure is presented, allowing measurements at temperatures as high as 1500 K, with the objective to extend the technique for the study of crystalline phase transitions and associated strain-field evolution that occur at high temperatures. A method is provided to measure the real temperature encountered by the specimen, which can be critical for precise phase-transition studies, as well as a strategy to calibrate the setup geometry to account for the sample and furnace dilation using a standard α-alumina single crystal. A first application to phase transitions in a polycrystalline specimen of pure zirconia is provided as an illustrative example.

Keywords: General Biochemistry; Genetics and Molecular Biology; Laue microdiffraction; high temperatures; Phase transitions; Microstructure; Strain fields; Polycrystalline materials; QMAX furnace

Domains: Engineering Sciences [physics]; Cristallography

Ravi Raj Purohit Purushottam Raj Purohit, Daniel Fowan, Stephan Arnaud, Nils Blanc, Jean-Sébastien Micha, et al.. Laue microdiffraction on polycrystalline samples above 1500 K achieved with the QMAX-µLaue furnace. Journal of Applied Crystallography, 2024, 57 (2), pp.470-480. ⟨10.1107/s1600576724001821⟩. ⟨hal-04566569⟩