Study of the mechanical behaviour of zirconium 702αin correlation with the texture determined by X-ray diffraction

2003 ◽  
Vol 100 (12) ◽  
pp. 1179-1183
Author(s):  
H. Francillette ◽  
A. Gavrus ◽  
J-L. Béchade
Keyword(s):  
Mechanical Behaviour ◽  
X Ray Diffraction ◽  
X Ray

On the Causes of Natural Cementation in Sensitive Soils

1972 ◽  
Vol 9 (1) ◽  
pp. 117-119 ◽  
Author(s):  
Dwight A. Sangrey
Keyword(s):  
Mechanical Behaviour ◽  
Chemical Weathering ◽  
Unique Characteristic ◽  
X Ray Diffraction ◽  
Secondary Products ◽  
X Ray ◽  
Cemented Soils ◽  
Fresh Rock

A unique characteristic of many naturally cemented sensitive soils is that they are made up of finely ground fresh rock debris, "rock flour", much of which is very susceptable to chemical weathering or decomposition. Many of these minerals can be identified by X-ray diffraction. The decomposition of these minerals produces secondary products which can act as effective natural cements. A process is outlined whereby the sequence of deposition, weathering and cementation can account for the observed mechanical behaviour of naturally cemented soils.

Influence of Sterilization with γ-Irradiation in the Degradation of Plasma Sprayed Hydroxyapatite Coatings

2006 ◽  
Vol 514-516 ◽  
pp. 1054-1058 ◽  
Author(s):  
Tânia Costa ◽  
Ana Paula Serro ◽  
Eduardo Pires ◽  
Rogerio Colaço
Keyword(s):  
Mechanical Behaviour ◽  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
Γ Irradiation ◽  
Water Contact ◽  
X Ray ◽  
Angle Measurements ◽  
Hydroxyapatite Coatings ◽  
Plasma Sprayed ◽  
Irradiation Process

The influence of sterilization with γ-irradiation in the properties of plasma sprayed hydroxyapatite (HAp) coatings used for medical implants is investigated in this work. HAp coatings were applied on titanium alloy substrates by plasma spraying and then submitted to 1 and 10 cycles of sterilization with γ-irradiation. As-applied HAp coatings were used as control samples. Afterwards, the modifications on the samples, induced by the irradiation process, were evaluated by X-ray diffraction and X-ray photoelectron spectroscopy (XPS). Water contact angle measurements as well as adhesion tests were also carried out in order to evaluate the influence of the irradiation process on the wettability and mechanical behaviour of the HAp coatings. No microstructural modifications were detected by X-ray diffraction after sterilization. However, the results show that sterilization with γ-irradiation originates modifications of the surface of HAp, as detected by a change of color of the coatings and by the XPS analysis. Nevertheless, these modifications do not result in significant changes in the wettability and mechanical behaviour of the HAp coatings.

The mechanism of bending in a plastically flexible crystal

2020 ◽  
Vol 56 (84) ◽  
pp. 12841-12844
Author(s):  
Subhrajyoti Bhandary ◽  
Amy J. Thompson ◽  
John C. McMurtrie ◽  
Jack K. Clegg ◽  
Peuli Ghosh ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Mechanical Behaviour ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fluorine Interactions

The mechanism of plastic deformation in crystals of a trifluoromethylated benzamide derivative has been determined with micro-focused X-ray diffraction. Fuorine–fluorine interactions are propose to mediated the observed mechanical behaviour.

Modelling of mechanical behaviour of polyamide nanocomposite fibres using a three-phase Halpin-Tsai model

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Emilia Garofalo ◽  
Giovanna Maria Russo ◽  
Luciano Di Maio ◽  
Loredana Incarnato
Keyword(s):  
Mechanical Behaviour ◽  
Analytical Techniques ◽  
Elongational Flow ◽  
Polyamide 6 ◽  
Morphological Parameters ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
X Ray ◽  
Three Phase ◽  
Fibre Spinning

AbstractThe aim of the present study is to correlate the features of the elongational flow-induced morphology to the mechanical properties of polyamide based nanocomposite fibres. Particular attention was paid to modelling the mechanical behaviour of the hybrids which were produced by fibre spinning technique and collected at different draw ratios.Tensile properties of as-spun and stretched fibres were investigated and correlated to their nanostructure through analytical techniques sensitive to different aspects of the hybrids morphology, such as X-Ray diffraction and TEM analysis. In particular, the TEM images of the nanocomposite systems showed intercalated/exfoliated morphology in all hybrids. For this reason, a three-phase Halpin-Tsai model, based on polyamide-6 matrix, exfoliated clay platelets and nanolayer intercalated clusters, was used to fit the experimental data.This method was applied to calculate the Young’s modulus of nanocomposite fibres both as-spun and stretched ones. Moreover, the model was used for predicting the effect of various morphological parameters including the exfoliation degree, clay layer and cluster aspect ratio.

scholarly journals Understanding the thermo-mechanical behaviour of solid oxide fuel cell anodes using synchrotron X-ray diffraction

2018 ◽  
Vol 314 ◽  
pp. 156-164 ◽  
Author(s):  
T.M.M. Heenan ◽  
J.B. Robinson ◽  
X. Lu ◽  
B. Tjaden ◽  
A. Cervellino ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Mechanical Behaviour ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fuel Cell Anodes

scholarly journals In Situ Measurement of Internal Stresses and Strain Rates by High Energy X-Ray Diffraction during High Temperature Mechanical Testing

2011 ◽  
Vol 278 ◽  
pp. 48-53 ◽  
Author(s):  
Alain Jacques ◽  
Laura Dirand ◽  
Jean Philippe Chateau ◽  
Thomas Schenk ◽  
Olivier Ferry ◽  
...  
Keyword(s):  
High Temperature ◽  
Mechanical Behaviour ◽  
Lattice Mismatch ◽  
High Energy ◽  
Internal Stresses ◽  
Strain Rates ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
X Ray

The combination of high temperature (1050°C -1150°C) testing and in situ high energy X-Ray diffraction measurements using synchrotron Three Crystal Diffractometry may give various insights into the mechanical behaviour of superalloys: measurement of the lattice mismatch, order within the ' phase, elastic constants, and dynamic response to changes in the experimental conditions. Several examples are given on the rafted AM1 superalloy, resulting from experiments at the ID15A (ESRF) and BW5 (DESY) high energy beamlines.

scholarly journals Nonlinear mechanical behaviour of Ba0.5Sr0.5Co0.8Fe0.2O3−δ and in situ stress dependent synchrotron X-ray diffraction study

2017 ◽  
Vol 300 ◽  
pp. 106-113 ◽  
Author(s):  
Philipp T. Geiger ◽  
Oliver Clemens ◽  
Neamul H. Khansur ◽  
Manuel Hinterstein ◽  
Mtabazi G. Sahini ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Mechanical Behaviour ◽  
In Situ Stress ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nonlinear Mechanical ◽  
Stress Dependent
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