Grain size distribution on the

A notable exception is a study by Hesse et al. (2008) who investigated the effect of powder grain size and grain size distribution on the spatial distribution of calcium phosphate phases in atmospheric plasma-sprayed hydroxyapatite coatings incubated in r-SBF (SBF-H, Table 7.8). Coatings were mechanically abraded under dry conditions in steps of 40 pm by abrasive SiC paper, and the newly created surfaces analysed by XRD with Rietveld refinement for their quantitative phase composition. The results of this depth profiling are shown in Figure 6.8. 

Magana, L. F., Escobar, M. A. Valenzuela, R. (1986). Effect of the grain size distribution on the ferromagnetic hysteresis loops. Physica status solidi (a),... 

Effect of grain size distribution on the density of a soil sample 8.3.5 Density measurement R3.6 Typical relative density values of hydraulic fill before compaction ... 

Effect of grain size distribution on the density of a soil sample... 

T. D. Burchell, A. P. G. Rose and M. O. Tucker. The influence of grain size distribution on a fracture criterion for graphites. In Proc. 17th Biennial Conf on Carbon, Lexington KY, USA. Pub. American Carbon Society, 1985, pp.346 347. 

The actual requirements for the sand in slow filtration are chemical in nature. Purity and the absence of undesirable matters are more important than grain-size distribution in the filtration process. On the other hand, the performance of rapid filters requires sands with quite a higher precise grain size. In the case of rapid filtration, the need for hydraulic performances is greater than in slow nitration. This means that the grain-size distribution of the medium is of prime concern in the latter case. 

This depends very largely on the composition of the body and the temperature to which it is fired. The addition of a clay grog will normally reduce the tensile strength but the degree of reduction depends on the proportion used, the grain-size distribution of the grog, and the particle shape. The... 

The name fine ceramics is based on the grain size distribution of the hard components in the ceramic mass. This rather differs from the distribution as it is seen in the ceramic branch of industry which produces for instance bricks, the coarse ceramic industry. Another difference is that all fine ceramic products are provided with a protective and in some cases also decorative coating, a so-called glaze. In this section much attention will be paid to glazes because this technique is rather unique for fine ceramics and because it offers the possibility to explore the subject glass and some important physical and chemical properties of materials. 

Measurements of physical properties usually encompass the whole, undisturbed sediment. Two types of parameters can be distinguished (1) bulk parameters and (2) acoustic and elastic parameters. Bulk parameters only depend on the relative amount of solid and fluid components within a defined sample volume. They can be approximated by a simple volume-oriented model (Fig. 2.2a). Examples are the wet bulk density and porosity. In contrast, acoustic and elastic parameters depend on the relative amount of solid and fluid components and on the sediment frame including arrangement, shape and grain size distribution of the solid particles. Viscoelastic wave propagation models simulate these complicated structures, take the elasticity of the frame into account and consider interactions between solid and fluid constituents. (Fig. 2.2b). Examples are the velocity and attenuation of P-and S-waves. Closely related parameters which mainly depend on the distribution and capillarity of the pore space are the permeability and electrical resistivity. 

Acoustic and elastic properties are directly concerned with seismic wave propagation in marine sediments. They encompass P- and S-wave velocity and attenuation and elastic moduli of the sediment frame and wet sediment. The most important parameter which controls size and resolution of sedimentary structures by seismic studies is the frequency content of the source signal. If the dominant frequency and bandwidth are high, fine-scale structures associated with pore space and grain size distribution affect the elastic wave propagation. This is subject of ultrasonic transmission measurements on sediment cores (Sects. 2.4 and 2.5). At lower frequencies larger scale features like interfaces with different physical properties above and below and bed-forms like mud waves, erosion zones and ehatmel levee systems are the dominant structures imaged... 

The applicability of the model is demonstrated by a parameter study focusing on the remediation of a PAH contaminated site with the help of surfactants. It is found that the spreading and the removal of the contaminant (phenanthrene) are strongly affected by the grain size distribution and the surfactant concentration, respectively. 

Data on grain size distribution of the various strata is important to the overall site characterization and provides information related to other properties and behavior, such as permeability and water flow. Two main concerns are testing procedures and texture (grain size) classification systems. At present, there is no universally accepted classification system and testing methods can be quite different. The presence of significant biogenous materials, effects of flocculation due to salts, and the fact that some deep-sea clays are extremely fine-grained, requires that special procedures be considered. 

Figure 14 - Effect of Oxygen Enrichment on the Grain Size Distribution of the Calcine. Oxygen Increases the Bed Pressure and Grain Size...

A1 or Cu, depends on the structure of the conductor metal for example, Vaidya and Simha [97] reported that the measured MTF of Al-0.5% Cu thin films is a function of three microstructural variables (attributes) its median grain size s, the statistical variance of the grain size distribution, and the degree of the (111) fiber texture in the film. They showed that the dependence of electromigration resistance, Rem, on microstructure can be expressed as the product of the median grain size and normalized film texture, when divided by the variance of the grain size spread... 

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