Deformational behaviour of ceramics

Gogotsi, G. A.

doi:10.1016/0955-2219(91)90005-k

Cited by 40 publications

(8 citation statements)

References 9 publications

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“…As a result, the actual fracture strain of the ZnO thin films should be between 1.73% and 2.14%. The literature indicates that the fracture strain of ceramics is 0.6%, [20][21][22][23][24][25][26][27][28][29] which means the ZnO thin films on the PET substrate can withstand a relatively large fracture strain. The actual fracture strain of ZnO thin films includes elastic and plastic strains.…”

Section: Methodsmentioning

confidence: 99%

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Plastic deformation of ZnO thin films through edge and screw dislocation movements

Chen

Chou

et al. 2021

J Am Ceram Soc.

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Columnar wurtzite grains were formed in sputtered ZnO thin films deposited on a plastic polyethylene terephthalate substrate. Selected-area diffraction patterns reveal that the columnar grains in the sputtered films present two preferred growth planes, namely, the basal (0002) and prismatic (1010) growth planes. The diffraction patterns obtained also confirm that the microstructure of sputtered indium tin oxide thin films is amorphous in nature. Tensile tests indicate that the fracture strain of the ZnO thin film occurs between 1.73% and 2.14%, while the fracture strain of the indium tin oxide thin film occurs between 0.24% and 0.67%.Thus, the fracture toughness of the sputtered ZnO thin film is greater than that of the sputtered indium tin oxide thin film. High-resolution transmission electron microscopic images demonstrate that edge and screw dislocations could be identified in the sputtered ZnO thin films. Moreover, edge and screw dislocation movements may, respectively, be observed in the basal-and prismatic-oriented ZnO columnar grains of the sputtered ZnO thin films. Our results indicate that movements of the edge and screw dislocations in the basal-and prismatic-oriented ZnO columnar grains account for the plastic deformation of the investigated ZnO thin films under tensile stress.

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Section: Methodsmentioning

confidence: 99%

“…23 Impregnation of alumina matrix in eight-harness satin Nextel 610 fabric has been studied numerically in Ref. [ 24 ]. Modeling approaches used in the above work generally involved modeling the flow of a high viscosity resin through porous media and modeling the chemical reactions and volumetric changes during processing.…”

Section: Introductionmentioning

confidence: 99%

Plastic deformation of ZnO thin films through edge and screw dislocation movements

Chen

Chou

et al. 2021

J Am Ceram Soc.

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“…Zirconium dioxide (ZrO 2 ) is an extensively studied material with widespread applications in medicine, [1][2][3] gas-cleaning technology, 4 ceramics, [5][6][7] corrosion-resistant materials, [8][9][10] and heterogeneous catalysis. 11 As in the case of titania (TiO 2 ), photosensitization of water on a ZrO 2 electrode has inspired the development of ZrO 2 based technologies to exploit its photocatalytic properties for solar-powered hydrogen fuel cells. [12][13][14][15][16] Despite significant effort, these technologies are not yet viable, in part due to the limited mechanistic knowledge needed for further development.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Coexistence of Cis and Trans Isomers in the Hydrolysis of ZrO2: A Coupled DFT and High-Resolution Photoelectron Spectroscopy Study

Taka¹,

Babin²,

Sheng³

et al. 2020

Preprint

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High-resolution anion photoelectron spectroscopy of the ZrO3H2- and ZrO3D2- anions and complementary electronic structure calculations are used to investigate the reaction between zirconium dioxide and a single water molecule, ZrO20/- + H2O. Experimental spectra of ZrO3H2- and ZrO3D2- were obtained using slow photoelectron velocity-map imaging (cryo-SEVI), revealing the presence of two dissociative adduct conformers and yielding insight into the vibronic structure of the corresponding neutral species. Franck-Condon simulations for both the \textit{cis}-- and \textit{trans}--dihydroxide structures are required to fully reproduce the experimental spectrum. Additionally, it was found that water-splitting is stabilized more by ZrO2 than TiO2, suggesting Zr-based catalysts are more reactive toward hydrolysis.

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“…1 This gives rise 2 to other dierences in their behaviour on loading. However, the mechanical behaviour was mainly studied on the materials characterised with considerable inelasticity 3±5 while the materials with the limit of proportionality not greatly diering from the ultimate strength were given little attention.…”

Section: Introductionmentioning

confidence: 99%

“…2) and investigated at RT and LT. The results of their strength determinations (eqns (2) and (3)) at RT on 4-point exure (20±40 mm span) are summarised in Table 4. Fracture toughness results (eqns (5) and (6)) on 3-point¯exure (20 mm span) are depicted in Fig.…”

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confidence: 99%

Mechanical behaviour of yttria- and ferric oxide-doped zirconia at different temperatures

Gogotsi

1998

Ceramics International

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The variation of strengh, deformability, fracture toughness and other characteristics of partially stabilized zirconia ceramics (Y±Fe±PSZ) doped with 3% yttrium and 3% ferric oxide over a temperature range from À140 to 1400 C were investigated. Fracture toughness (K 1c ) values obtained by the methods such as SENB, SEPB, IS and IF were compared. Lower temperatures resulted in an increase in fracture toughness by approximately 29%. Using the Vickers indents as stress concentrators for the IS tests we derived the relationship between K 1c values and mean values of radial crack length described by a second-degree polynomial. The data for zirconia (Y±PSZ and Mg±PSZ) and silicon-nitride ceramics, as well as the fractographic data, were used to analyse the results. It was established that the addition of ferric oxide exerted a positive eect on the strengh and fracture toughness of zirconia ceramics. # 1998 Elsevier Science Limited and Techna S.r.l.

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Deformational behaviour of ceramics

Cited by 40 publications

References 9 publications

Plastic deformation of ZnO thin films through edge and screw dislocation movements

Plastic deformation of ZnO thin films through edge and screw dislocation movements

Unveiling the Coexistence of Cis and Trans Isomers in the Hydrolysis of ZrO2: A Coupled DFT and High-Resolution Photoelectron Spectroscopy Study

Mechanical behaviour of yttria- and ferric oxide-doped zirconia at different temperatures

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