CSL grain boundary distribution in alumina and zirconia ceramics

Vonlanthen, Pierre; Grobéty, Bernard

doi:10.1016/j.ceramint.2007.04.006

Cited by 29 publications

(28 citation statements)

References 38 publications

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“…8) are close to the distribution calculated for a random texture [33], i.e. they confirm the lattice preferred orientations (LPO) results, but are slightly higher than expected, although this may be due to parameters used in applying the Brandon criterion [42], which was originally derived to accommodate the effects of tilting at grain boundaries due to dislocation arrays.…”

Section: Resultssupporting

confidence: 61%

“…The grain misorientation distribution has been determined from the ODF (Orientation Distribution Function) and compared to random distributions [33]. The grain boundaries (GB's) satisfying the coincidence site lattice (CSL) model for the multiplicity index ˙ values up to 49 were automatically detected for cubic materials, using the list integrated in the software [34].…”

Section: Electron Backscattered Diffraction (Ebsd)mentioning

confidence: 99%

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A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Salehi

Clemens

Pfaff

et al. 2011

Journal of Membrane Science

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Oxygen permeability measurements of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−ı (BSCF) disk shaped membranes fabricated by thermoplastic processing and sintered at different temperatures (1000-1100• C), showed no influence of the grain size on the oxygen permeation fluxes. To further investigations, Electron Backscattered Diffraction (EBSD) and Conductive mode (CM) microscopy methods were used for texture analysis and observation of the local electrical behavior in the BSCF membranes, respectively. EBSD results revealed that the grain size of the membranes increased with increasing the sintering temperature from an average of 3.32 m at 1000• C to 18.25 m at 1100 • C. Also, it was seen that there was no textural difference between the different samples. CM analysis demonstrated that the electronic conductivity of the grains and grain boundaries was similar in the membrane sintered at 1000• C. Finally, the stability of the membrane under the operation conditions was tested, and it was found that the permeation flux was nearly constant at 900• C after an operation time of more than 50 h, whereas oxygen permeation flux declined after a relative short time at 825• C.

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Section: Resultssupporting

confidence: 61%

Section: Electron Backscattered Diffraction (Ebsd)mentioning

confidence: 99%

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Salehi

Clemens

Pfaff

et al. 2011

Journal of Membrane Science

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“…Severe deformation during preparation of synthetic ceramics, can influence the grain shape, and may influence the grain boundary distribution if there is an LPO (Vonlanthen and Groberty 2008). For synthetic NaCl, both the starting powder and the cold pressing stage produce a large number of {100} faces that may influence the grain boundary distribution.…”

Section: Discussionmentioning

confidence: 99%

Grain boundary plane populations in minerals: the example of wet NaCl after low strain deformation

Pennock

Coleman

Drury

et al. 2009

Contrib Mineral Petrol

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Many physical properties of rocks are sensitive to grain size and hence to the structure of grain boundaries. Depending on their properties, such as deformation and transport behaviour, boundaries may be divided into two broad types, namely special and general grain boundaries. Electron backscattered diffraction (EBSD) is used to investigate the misorientation distributions of grain boundaries and, more recently, to determine the population of grain boundary planes. Studies on metals and ceramics suggest that the grain boundary plane, rather than the misorientation, is the key parameter when defining special and general grain boundaries. In this study, the distribution of grain boundary plane orientations has been successfully determined using EBSD for a slightly deformed, synthetic NaCl material containing 22 ppm water. Boundaries showed a preference for {100} planes, which occurred with twice the frequency of a random distribution. The grain boundary plane distributions found in NaCl were largely in agreement with studies on MgO. Grain boundaries, with a coincident site lattice (CSL) misorientation, also showed a preference for {100} planes, rather than the planes of high coincident density associated with the CSL. Three main types of boundary were identified, namely {100} twist boundaries, boundaries with {100}{hkl} planes and general {hkl}{hkl} boundaries. As the properties of these three types of boundary differ, then the transport and creep properties in wet NaCl will depend on the fraction of the different boundary types found in the grain boundary population.

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“…Using techniques like electron backscatter diffraction (EBSD), it is possible to accurately determine the orientations of channeled grains [3,[8][9][10]. EBSD combines ability to measure site specific grain orientation along with high resolution imaging.…”

Section: Introductionmentioning

confidence: 99%

Effects of low ion dose on SE imaging and orientation dependent Ga-ion channeling

Saraf

2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tGrain contrasts produced during ion induced secondary electron imaging depend upon grain orientation and ability of Ga-ion beam to channel in it. The current study aims to investigate critical Ga-ion dose for Ni-alloy where a transition from grain surface imaging to sputtering dominated Ga-ion channeling occurs. It is observed that critical dose is in the vicinity of 10 15 ions/cm 2 . Strong orientation dependent Ga-ion channeling effects were observed at dose values higher than 10 17 ions/cm 2 . When a normalized orientation dependent grain transparency factor was estimated for each grain in a limited sampling volume, it was observed that despite low sampling volume for a random polycrystalline orientations and variation in Ga-ion dose, the range of sputter depth variation during Ga-ion channeling remains above 80% indicating dose or sampling volume (for randomly oriented poly-crystals) independency in the sputter dominated dose region. This study attempts to establish a correlation between high resolution imaging, applied Ga-ion dose and orientation dependent Ga-ion beam channeling effects.

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CSL grain boundary distribution in alumina and zirconia ceramics

Cited by 29 publications

References 38 publications

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Grain boundary plane populations in minerals: the example of wet NaCl after low strain deformation

Effects of low ion dose on SE imaging and orientation dependent Ga-ion channeling

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