%0 Journal Article
%A Nonemacher, Juliane Franciele
%A Naqash, Sahir
%A Tietz, Frank
%A Malzbender, Jürgen
%T Micromechanical Assessment of Al/Y-substituted NASICON Solid Electrolytes
%J Ceramics international
%V 45
%N 17A
%@ 0272-8842
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2019-05193
%P 21308 - 21314
%D 2019
%X Al/Y-substituted NASICON solid electrolytes are promising for novel solid state batteries. The solid solutions Na1+2xAlxYxZr2-2x(PO4)3 (NAYZPx) and Na3+2xAlxYxZr2-2x(SiO4)2(PO4) (NAYZSiPx) that crystallize in this structure are characterized by depth-sensitive indentation technique to determine their micro-mechanical properties. NAYZPx is rhombohedral, whereas NAYZSiPx changes from monoclinic to rhombohedral phase depending on substitutional level and temperature. For rhombohedral NAYZPx elastic moduli are in the range ~72–82 GPa and hardness values are in the range ~4.8–5.8 GPa, whereas for NAYZSiPx the elastic moduli are with the range ~72–88 GPa and hardness ~5.6–7.6 GPa, respectively. The fracture toughness values for both systems, as determined by Vickers indentation, are rather independent of the applied load being with the range 1.30–1.58 MPa m0.5. Cracks typically show a mixed intergranular/transgranular crack mode.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000493212500030
%R 10.1016/j.ceramint.2019.07.114
%U https://juser.fz-juelich.de/record/865916