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
E. N. CaspiInstitut PPRIME, Département de Physique et Mécanique des Matériaux, CNRS, Université de Poitiers, ENSMA UPR 3346, SP2MI, Téléport 2, Boulevard Marie et Pierre Curie, BP30179 86962 Futuroscope Chasseneuil Cedex, FrancePatrick ChartierInstitut PPRIME, Département de Physique et Mécanique des Matériaux, CNRS, Université de Poitiers, ENSMA UPR 3346, SP2MI, Téléport 2, Boulevard Marie et Pierre Curie, BP30179 86962 Futuroscope Chasseneuil Cedex, FranceFlorence PorcherLaboratoire Leon Brillouin (CEA/DSM/IRAMIS/LLB), UMR 12 CEA-CNRS, Centre d'Etudes de Saclay, Gif-sur-Yvette Cedex 91191, FranceF. DamayLaboratoire Leon Brillouin (CEA/DSM/IRAMIS/LLB), UMR 12 CEA-CNRS, Centre d'Etudes de Saclay, Gif-sur-Yvette Cedex 91191, FranceThierry Cabioc’hInstitut PPRIME, Département de Physique et Mécanique des Matériaux, CNRS, Université de Poitiers, ENSMA UPR 3346, SP2MI, Téléport 2, Boulevard Marie et Pierre Curie, BP30179 86962 Futuroscope Chasseneuil Cedex, France
2014en
ABI
Аннотация
Nanolamellar MAX phase compounds (Cr0.5V0.5)n+1AlCn are formed with n = 1, 2 and 3, and their 300 K structure is studied in detail by high-resolution neutron diffraction. While the n = 1 compound is found to have complete disordering of vanadium and chromium in the metallic layers, the n = 2 and 3 compounds show strong tendency for these elements' ordering, with the layer in the 2a(0,0,0) site of (Cr0.5V0.5)3AlC2 fully occupied by vanadium. The thermal expansion dependency of temperature is also studied by neutron diffraction for 2 < T < 550 K, revealing a negligible thermal expansion below 100 K for all of the compounds.
Ҳали таржима қилинмаган
Идентификаторлар
Иқтибослар ва манбалар
2 та иқтибос0 та фойдаланилган манба