Raman spectroscopy for the investigation of indentation-induced domain texturing in lead zirconate titanate piezoceramics

Deluca, Marco; Bermejo, Raúl; Grünbichler, Hannes; Presser, Volker; Dänzer, Robert; Nickel, Klaus G.

doi:10.1016/j.scriptamat.2010.04.040

Cited by 17 publications

(16 citation statements)

References 27 publications

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“…A 50 objective lens was used, which resulted in a laser spot size of ~3 µm. Raman mapping [35] was achieved by collecting spectra in the area around the indentation crack tip with step sizes of 2.5 µm (at virgin crack tip) and 3.0 µm (under electric field). A program in MATLAB® was created to compare the spectra and generate a contour map.…”

Section: Methodsmentioning

confidence: 99%

Transformation toughening in an antiferroelectric ceramic

et al. 2014

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Due to a larger specific volume of the ferroelectric phase, the antiferroelectric-ferroelectric transition is believed to have an enhanced toughening effect against fracture. The toughening requires a non-recoverable transformation in the crack process zone. Complementary measurement of the crystal symmetry, dielectric constant, field-induced polarization, and Raman spectrum on ceramic Pb0.99Nb0.02 [(Zr0.57Sn0.43)0.92Ti0.08]0.98O3 indicates that the antiferroelectric and the ferroelectric states are equally stable at room temperature. Raman mapping further reveals the presence of the ferroelectric phase in a localized zone at the crack tip after unloading. A significant phase-transition-toughening effect is demonstrated in the antiferroelectric ceramic with both indentation fracture and R-curve experiments. The effect in this model composition leads to toughness values ~50% larger than other antiferroelectric ceramics with similar compositions and 60 ~ 130% higher than ferroelectric Pb(Zr,Ti)O3 ceramics. A simple analysis confirms the toughening effect from both volumetric phase transition and deviatoric domain switching during the transformation. The results suggest that other materials near phase boundaries may have similar high fracture resistance. Keywords Antiferroelectric ceramics; Phase transition toughening; Raman mapping; R-curve Disciplines Ceramic Materials | Electro-Mechanical SystemsComments NOTICE: this is the author's version of a work that was accepted for publication in Acta Materialia . Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Acta Materialia , [62, 114, (2014)

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Section: Methodsmentioning

confidence: 99%

Transformation toughening in an antiferroelectric ceramic

et al. 2014

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“…We assumed the domains to be 100% textured, that is, the probed area has been assumed as a mesoscopic crystal of the dimensions of the Raman probe. This rather large approximation is satisfactory when the material has a domain size >1 lm or is highly textured, 40 both of which apply to the present compositions. 12 Figure 5 shows the intensity dependence of the 240 cm À1 (A g ), 340 cm À1 (A g ), 470 cm À1 (A g ), and 540 cm À1 (B 1g or B g ) modes of the investigated CNT materials.…”

Section: A Microstructure and Structural Analysismentioning

confidence: 67%

Probing structural changes in Ca(1−x)Nd2x/3TiO3 ceramics by Raman spectroscopy

Lowndes

Deluca

Azough

et al. 2013

Journal of Applied Physics

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Articles you may be interested inTemperature dependent Raman scattering and far-infrared reflectance spectra of MgO modified Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 ceramics: A composition effect Ceramics in the system Ca (1Àx) Nd 2x/3 TiO 3 , intended for mobile communication applications, exhibit grossly non-linear variations in microwave dielectric properties with composition. There is evidence of a structural transition and the formation of vacancies on the A-site of the perovskite structure. High density, single phase perovskite Ca (1Àx) Nd 2x/3 TiO 3 ceramics have been prepared by the mixed oxide route. Raman spectroscopy was used to investigate the structural variations, which impact on dielectric properties. The Raman spectra show that with increasing Nd content, there is a transition from an ordered structure, to a disordered arrangement of cations and vacancies, and back to an ordered arrangement in Ca 0.1 Nd 0.6 TiO 3 . A structural phase transition from orthorhombic Pbnm to monoclinic C2/m coincides with the order-disorder transition at Ca 0.1 Nd 0.6 TiO 3 . Polarized Raman spectroscopy facilitated the assignment of the Raman modes and investigation of the role of importance of domain structures. Large variation in the plane angles was attributed to differences in domain structures. Differences in the angular dependence of the Raman modes with Nd content reflect changes in the preferred orientation of the domains from lamellar twins, to wedge shaped and back to lamellar twins. V C 2013 American Institute of Physics. [http://dx.

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“…The directional influence of poling on crack growth is demonstrated by Deluca et al (2010), (p344) who show equal crack growth (131 µm long) in perpendicular directions for un-poled PZT and unequal crack growth rates in poled PZT ceramic (107 µm long cracks parallel to the poling direction and 183 µm long cracks perpendicular to the poling direction). This "anisotropy of fracture toughness and electric field induced fatigue crack growth in polarized piezoceramics affect significantly the service performance of actuators and sensors" ( , p1).…”

Section: Piezoceramic Element Fracturementioning

confidence: 97%

“…"The domains reorient themselves perpendicular to the crack propagation direction this switching process consumes elastic energy reducing the energy release rate for further crack propagation. Therefore cracks parallel to the poling direction are shorter than cracks perpendicular to it for the same applied load" ( (Deluca et al, 2010), p343), ((Okayasu et al, 2010a), p723). Domain switching in the vicinity of crack tips has been measured as 65% in the direction parallel to poling and 6% perpendicular to poling (Deluca et al, 2010), (p345).…”

Section: Piezoceramic Element Fracturementioning

confidence: 99%

“…Therefore cracks parallel to the poling direction are shorter than cracks perpendicular to it for the same applied load" ( (Deluca et al, 2010), p343), ((Okayasu et al, 2010a), p723). Domain switching in the vicinity of crack tips has been measured as 65% in the direction parallel to poling and 6% perpendicular to poling (Deluca et al, 2010), (p345). Okayasu et al (2010a), p717) report that domain switching may start at loads as low as 50 MPa.…”

Section: Piezoceramic Element Fracturementioning

confidence: 99%

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Investigation of the effects of structure-sensor interaction on piezoceramic transducers for structural health monitoring applications

Favier¹

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Surface bonded piezoceramic transducers used for structural health monitoring that are subjected to high strain loading are at risk of being compromised by damage to the attaching bond line or to the piezoceramic sensing element. In consequence, when baseline sensor data for a healthy structure is compared to subsequent data obtained from damaged sensors, incorrect assessment of the state of the structure may occur.This project investigated and developed a novel method of attaching piezoceramic transducers to specially prepared thermoset composite surfaces using functional thermoplastic surfaces as bond line media with the aim to improve the protection of the transducer from the damaging effects of high strain structural loading.To evaluate the effectiveness of this new approach, the fatigue performance of thermoplastic weld bonded and cyanoacrylate adhesive bonded transducers were compared.Finite element analysis (FEA) of transducer-bondline-structure models showed that strain transfer from the structure to the piezoceramic element reduced as bond layer thickness increased or as the bond layer modulus decreased. The simulations indicated that within each material layer shear strain changes gradually and the rate of change is different for each material type. At dissimilar material interface boundaries shear strain has a common value but the change gradient differences within each material mean the interface is a likely location for transducer failure.For cyanoacrylate and thermoplastic bonding systems the availability of published data regarding bond strength is limited. Static tensile testing was undertaken to generate some of the bond strength data for different bond layer thicknesses and a range of surface roughness. The data showed that tensile bond strength increased with decreasing adhesive layer thickness and that for the range of surface roughness tested the relative performance of each bond line thickness was similar.To further examine the performance of the two different bonding systems, fatigue testing was undertaken. The relative performance of each system was compared using transducer output voltage and impedance data. Specimens were fabricated by bonding 10 mm diameter, 1 mm thick silver electroded piezoceramic transducers to appropriately ii prepared thermoset composite test coupons. Test samples were subjected to sinusoidal loading at 5 Hz and maximum strains of 1000 µɛ, and 2000 µɛ or 3000 µɛ.For both bond types, sensor voltage output showed an initial period of rapid decrease in amplitude before typically settling at an approximate steady state output. The lower voltage output from the thermoplastic bonded transducers indicated that the thermoplastic bond lines reduced strain transfer between the host structure and the piezoceramic sensing element.The fatigue test results showed that polyvinylidene fluoride (PVDF) bonded transducers experienced a reduced or similar decrease in performance relative to the cyanoacrylate bonded transducers for the same number of load cycles and strain ran...

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Raman spectroscopy for the investigation of indentation-induced domain texturing in lead zirconate titanate piezoceramics

Cited by 17 publications

References 27 publications

Transformation toughening in an antiferroelectric ceramic

Transformation toughening in an antiferroelectric ceramic

Probing structural changes in Ca(1−x)Nd2x/3TiO3 ceramics by Raman spectroscopy

Investigation of the effects of structure-sensor interaction on piezoceramic transducers for structural health monitoring applications

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