1 research outputs found
Ordering of (Cr,V) Layers in Nanolamellar (Cr<sub>0.5</sub>V<sub>0.5</sub>)<sub><i>n</i>+1</sub>AlC<sub><i>n</i></sub> Compounds
No full text<div><p>Nanolamellar MAX phase compounds (Cr<sub>0.5</sub>V<sub>0.5</sub>)<sub><i>n</i>+1</sub>AlC<sub><i>n</i></sub> are formed with <i>n</i> = 1, 2 and 3, and their 300 K structure is studied in detail by high-resolution neutron diffraction. While the <i>n</i> = 1 compound is found to have complete disordering of vanadium and chromium in the metallic layers, the <i>n</i> = 2 and 3 compounds show strong tendency for these elements' ordering, with the layer in the 2a(0,0,0) site of (Cr<sub>0.5</sub>V<sub>0.5</sub>)<sub>3</sub>AlC<sub>2</sub> fully occupied by vanadium. The thermal expansion dependency of temperature is also studied by neutron diffraction for 2 < <i>T</i> < 550 K, revealing a negligible thermal expansion below 100 K for all of the compounds.</p></div
