Micromechanics of residual stress and texture development due to poling in polycrystalline ferroelectric ceramics

Nonlinear stress-strain behavior and stress-induced phase transitions in soft Pb(Zr1−xTix)OSeo1, Franzbach2, Koruza3 et al. 2013Phys. Rev. B496261View full textAdd to dashboardCite

“…41 Following mechanical loading, the interactions between neighboring grains result in a strain incompatibility that can generate local residual stresses. Hall et al 42,43 have shown that this effect is present in both rhombohedral and tetragonal structured PZT compositions during electrical loading, although the magnitude of the local stress fields depends strongly on the anisotropy of the elastic coefficients of each phase. In addition, Jones et al 41 have estimated the overall contribution of non-ferroelastic remanent strain contributions to account for approximately 25% of the overall macroscopic remanent strain in a purely tetragonal PZT composition.…”

Residual stress relief due to fatigue in tetragonal lead zirconate titanate ceramics

“…This result is in reasonable agreement with that determined previously for a soft tetragonal PZT ceramic. 21 Similarly, for the fatigued specimen (a ¼ 0.38) the elastic strain along the poling direction is 0:59 Â 10 À3 . We assume that the macroscopic poling strain remains the same in the virgin and fatigued states, since the R{200} values were similar, as shown in Fig.…”

“…19 The present authors have proposed a micromechanical model to describe the development of residual stress due to domain switching in polycrystalline ferroelectrics, using an approach based on the classical Eshelby inclusion method. [20][21][22] The model is supported by experimental measurements of the changes in ferroelectric domain orientations and crystal lattice strain as a function of the grain orientation, w, relative to the electric field direction, obtained using high energy synchrotron XRD (X-ray diffraction). The observed lattice strain under an applied electric field is a sum of two contributions, which are the intrinsic piezoelectric effect and the elastic strain caused by residual inter-granular stress; 23 the latter contribution is a result of the misfit, or eigenstrain, between a grain and the surrounding polycrystalline matrix, which undergoes an average transformation strain due to ferroelectric domain switching.…”

Revisiting the blocking force test on ferroelectric ceramics using high energy x-ray diffraction

“…However, it is known that the macroscopic strain of ferroelectric ceramics under electromechanical loading conditions is the result of a complex combination of the intrinsic piezoelectric effect, the extrinsic effects resulting from non-180 domain switching, and the development of internal inter-granular stresses. 3,4 In recent years, diffraction techniques have been exploited as a means of evaluating the local lattice strain and domain switching behaviour of polycrystalline ferroelectric materials in response to external electric and/or mechanical loading. [3][4][5][6][7][8][9][10][11][12][13][14] These studies have shed new light on ferroelectric behaviour and enabled the origins of non-linearities to be characterised.…”