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Article Dans Une Revue Journal of Applied Physics Année : 2022

Mechanical properties of Li 2 MoO 4 single crystals

A. Ahmine
  • Fonction : Auteur
P. Djemia
  • Fonction : Auteur
M. Fivel
  • Fonction : Auteur
N. Girodon-Boulandet
  • Fonction : Auteur
M. Velazquez
L. Xuan
  • Fonction : Auteur
T. Duffar
  • Fonction : Auteur

Résumé

Mechanical properties of lithium molybdate single crystals, Li 2 MoO 4 , are studied from room temperature to 650 °C. Density functional theory calculations gave the seven elastic constants of the rhombohedral crystal at 0 K. Brillouin light scattering experiments delivered comparable values at room temperature, and measurements up to 650 °C show a linear decrease in the constants with temperature. Nano-indentation results were typical of a brittle material with a low Young modulus and allowed deriving Young's moduli, for c (63 GPa) and m (48 GPa) faces, in agreement with those computed from measured elastic constants. Compressive rupture tests were performed. At 650 °C, the rupture stress was in the range 2–7.5 MPa. No clear evidence of a plastic regime was observed before cracking, even at temperatures close to the melting point.
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Dates et versions

hal-03893594 , version 1 (11-12-2022)

Identifiants

Citer

A. Ahmine, P. Djemia, M. Fivel, D. Faurie, N. Girodon-Boulandet, et al.. Mechanical properties of Li 2 MoO 4 single crystals. Journal of Applied Physics, 2022, 131 (17), pp.175102. ⟨10.1063/5.0085260⟩. ⟨hal-03893594⟩
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