Microstructural characterization of porous materials by two-dimensional X-ray refraction topography

Harbich, Karl-Wolfram; Klobes, P.; Hentschel, Manfred P.

doi:10.1016/j.colsurfa.2004.04.074

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…For example, nuclear magnetic resonance has limited applications in soils rich in iron. Small angle scattering can not be used in some soils with course textures [10]. Even when such techniques are applicable, studying the complex pore structure of unconsolidated sediments is confounded by the difficulty in collecting and characterizing undisturbed samples without altering the particle associations and in situ pore configuration.…”

Section: Introductionmentioning

confidence: 97%

A study of pore geometry effects on anisotropy in hydraulic permeability using the lattice-Boltzmann method

Stewart

Ward

Rector

2006

Advances in Water Resources

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Section: Introductionmentioning

confidence: 97%

A study of pore geometry effects on anisotropy in hydraulic permeability using the lattice-Boltzmann method

Stewart

Ward

Rector

2006

Advances in Water Resources

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“…Also, as X-ray refraction is sensitive to orientation, preferential alignment or positioning of cracks can be examined [53]. An investigation of SiC and alumina materials has shown that the internal surface density, pores sizes and their spatial distribution can be quantitatively characterized by X-ray refraction topography (XRRT) [54].…”

Section: Introductionmentioning

confidence: 99%

Phase transformation induces plasticity with negligible damage in ceria-stabilized zirconia-based ceramics

et al. 2020

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Ceramics and their composites are in general brittle materials because they are predominantly made up of ionic and covalent bonds that avoid dislocation motion at room temperature. However, a remarkable ductile behavior has been observed on newly developed 11 mol.% ceria-stabilized zirconia (11Ce-TZP) composite containing fine alumina (8vol.% Al 2 O 3 ) and elongated strontium hexa-aluminate (8vol.% SrAl 12 O 19 ) grains. The assynthesized composite also has shown full resistance to Low Temperature Degradation (LTD), relatively high strength and exceptionally high Weibull modulus, allowing its use in a broader range of biomedical applications. In this study, to deepen the understanding of *Manuscript Click here to download Manuscript: TEXT-Final_revised_reveron et al.docx Click here to view linked References plastic deformation in Ce-TZP based composites that could soon be used for manufacturing dental implants, different mechanical tests were applied on the material, followed by complete microstructural characterization. Distinct from pure Ce-TZP material or other zirconia-based ceramics developed in the past, the material here studied can be permanently strained without affecting the Young modulus, indicating that the ductile response of tested samples cannot be associated to damage occurrence. This ductility is related to the stressinduced tetragonal to monoclinic (t-m) zirconia phase transformation, analogue to Transformation-Induced Plasticity (TRIP) steels, where retained austenite is transformed to martensite. The aim of this study is to corroborate if the observed plasticity can be associated exclusively to the zirconia t-m phase transformation, or also to microcraking induced by the transformation. The t-m transformed-zones produced after bending and biaxial tests were examined by X-ray refraction and SEM/TEM coupled with Raman. The results revealed that the observed elastic-plastic behavior occurs without extensive microcracking, confirming a purely elastic-plastic behavior driven by the phase transformation (absence of damage).

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“…The fi nal tomogram is a product of numerous individual images, where the sample is rotated around one defi ned axis for a defi ned angle, resulting in a set of images, which is the input to a reconstruction algorithm. 3 Depending on the setup and the focus of the research, tomographic imaging can be used for a variety of questions in fuel cell research, which will be summarized below and discussed in more detail in the following sections. Synchrotron radiography has so far been almost exclusively used for in situ studies focusing on the observation of water transport phenomena, while synchrotron tomography is used for both ex situ and in situ applications.…”

Section: X-ray Tomographymentioning

confidence: 99%

Synchrotron radiography for high resolution transport and materials studies of low temperature fuel cells

Hartnig

Manke

2012

Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology

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Microstructural characterization of porous materials by two-dimensional X-ray refraction topography

Cited by 8 publications

References 3 publications

A study of pore geometry effects on anisotropy in hydraulic permeability using the lattice-Boltzmann method

A study of pore geometry effects on anisotropy in hydraulic permeability using the lattice-Boltzmann method

Phase transformation induces plasticity with negligible damage in ceria-stabilized zirconia-based ceramics

Synchrotron radiography for high resolution transport and materials studies of low temperature fuel cells

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