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A number of earth materials, notably three distinct types of clays prevalent in Sri Lanka, were singled out for examination.
The general trend in the characteristics of three different types of clays suggests that grains from roof tile clays exhibit satisfactory grading and sorting, while particles from brick clays demonstrate inadequate grading.
Brick clay, with its smaller grain sizes and better sorting, seems to be better suited for water treatment applications due to its lower permeability and hydraulic conductivity.
Observations and conclusions of the FT- IR analysis Wave number (cm-1)/ Reference Wave number (cm-1) / Obtained Functional groups/ Minerals 3698 ~3700 O-H stretching 3698, 3652,1095, 908, 689, 528 ~3700, ~3650, ~1100, ~900, ~700, ~550 Kaolinite Al2 (Si2O5)(OH)4 1075, 790, 452 ~1100, ~800, ~450 Quartz SiO2 1001 ~1000 Muscovite KAl2(AlSi3O10)(OH)2 1006 ~1000 Glauconite (K,Na)(Mg,Fe)(Fe,Al)(Si,Al)4 O10 (OH)2 407, 396 ~ 400 Marcasite FeS2 After analyzing the FT-IR analysis of clay used for roof tiles, it is evident that both quartz and kaolinite are present.
The smaller grain sizes of the roof tile clay can be viewed as beneficial for applications related to adsorption, as the surface area plays a crucial role in determining the efficiency of adsorption capacity.

It can be seen that a large number of macropores and crack-like defects were present in the HA06F-YTZP composites with YTZP contents Figure. 1.
The YTZP phase or the YTZP grains were distributed on the grain boundaries and also within the grains of the matrices.
Furthermore, with the increase of the YTZP content, more YTZP grains were trapped within the grains.
The slow growth of the YTZP grains may be due to the low sintering temperature of 1400o C (relative to YTZP) used and the significant isolation of the YTZP grains or particles by the matrix grains.
On the other hand, the reduced matrix grain size due to the presence of the YTZP grains was caused by the grain boundary drag effect of the zirconia particles or grains, which slowed down the grain growth of the matrix phase(s).

When the annealing temperature was increased at same spin speed, both grain size and thickness were increased.
XRD pattern of 5 samples: 4 first numbers is spin speed (rpm) and last 3 numbers is annealing (oC) Microstructure Analysis.
This is because the fusion of grains was happened due to increment of energy [21].
Spin speed and annealing temperature dependence on the grain size of ZnO thin films Fig. 5.
It was also due to surface grain area increases.

However, there are a large number of double soil systems in real site.
Physical model of double soil systems Contaminated groundwater was first exposed to the coarse-grained soil in the deep layer, and was elevated for a certain height by the effect of capillary action.
Because of the influence zone existed in the coarse-grained soil layer and no regulation of the shallow fine-grained soil layer, it had to use the vapor inhalation path of the coarse particle soil layer.
Table.2 Physical model and parameters Coordinate Long（m） Cells Step（m） x 500.0 50 10.0 y 20.0 20 1.0 z 10.0 20 0.5 Vertical meta types Coordinate Layer Soil type z 1-6 Clay z 7-20 Coarse-grained soil Physical parameters Parameters name Values Pressure 1.0bar Meta compressibility 0.001/bar Water-compressibility 1.0E-5/bar Water density 1000.0kg/m3 Gas viscosity 1.81×10-5kg/（m·s） Gas density 1.29kg/m3 Production well Borehole location Pressure difference z =0.95m 50.0Pa According to the parameters, the results from the new developed equations were as the followings: ,Since, then Q1=Qy≈4.2m3/d.Put the same parameters in table2 into ECLIPSE-2003a, it can be got that Qy was about 5.0m3/d.

The stabilization of zirconia grains in such composites is achieved thanks to the presence of a stiff alumina matrix[6-8].
For the case in direct laser sintering, the powders were ballmilled to a finer grain size under 75 mesh.In order to study the mechanism of powder state becoming a solid state during the laser sintering process, Optical Microscopes (DEYENCE VH-Z450) and HITACHI S-4300 Scanning Electronic Microscope（SEM）incorporating energy dispersive X-ray analysis (EDX) were used to analyze the morphological structure of the composition surface.
By a large number of orthogonal tests the optimal process parameters were obtained, laser repetitive rate =1400Hz, Energy=2.5V,output power=40W.
The right amount Al2O3 particles inhibited ZrO2 grain growth.
Analysis by sintered sample by SEM and EDX showed that when alumina zirconia ratio of one, the alumina grain size small, tightly [9].

The grain boundaries of YSZ can be seen in Fig. 7(a).
This demonstrates the start of Mn diffusion via the grain boundaries through the electrolyte.
In addition, the Mn elements diffuse along the grain boundary of the YSZ electrolyte.
This phenomenon can weaken the binding force between the grains, resulting in microcracks at the grain boundaries.
In addition, the diffuse along the grain boundary of the YSZ electrolyte can weaken the binding force between the grains.

The ferrite-austenite proportions were discovered to be impacted much by an assortment of number of passes and HI.
The coarse grains are seen in the HAZ in the close vicinity of the fusion line.
Quite a coarse grain in the close vicinity of the fusion line has been seen because of the thermal shock of welding.
In the WZ, formation of the new grains of the previously deposited weld can be seen in Fig.3(c).
The narrow arc achieves a less warm effect on the BM achieving a respectably more unassuming coarse grain of HAZ.

Table 2 Characteristic values of the sand D10 [mm] D30 [mm] D60 [mm] Effective grain size (mm) Uniformity coefficient Curvature coefficient Maximum void ratio Minimum void ratio 0.20 0.34 0.61 0.49 3.1 0.95 0.784 0.488 Fig. 2 Geometry data of the actual weight and after tetra mesh division Modeling of the weight.
However, it is practically difficult to reproduce grain size distribution of the actual sand in a numerical analysis.
Therefore, a grain size distribution with four particle size was assumed so that mass ratio of those four classes adjusted actual grain size distribution.
Analysis model (h=70cm) Table 4 Grain size distributions of the sand cushion model Sand thickness[cm] Radius of particle total 8.0 mm 12 mm 16 mm 20 mm h=70 Number 37486 24302 8613 4130 74531 Mass ratio[%] 14.82 32.43 27.24 25.51 100 h=50 Number 27026 17501 6145 2972 53644 Mass ratio[%] 14.87 32.51 27.06 25.56 100 h=30 Number 16379 10650 3745 1770 32544 Mass ratio[%] 14.90 32.69 27.25 25.16 100 Table 4 shows grain size distributions of the sand cushion model assumed in this study.

∆Smix=-Rc1lnc1+…+cnlncn=-Ri=1ncilnci (1) Where R is the gas constant, n is the number of alloy components, and ci is the content of the i-th component.
For an ideal solid solution, the closer to the equimolar ratio the number of components, the higher the mixing entropy is, according to the extreme value theorem.
When the energy density is lower than 100 J/mm3, the lower energy density and the higher cooling speed resulted in the finer grain structure.
Due to the rapid melting and solidification process by the laser, the cooling rate is fast, and the crystal grains are not as long as it grows, leading to achievement of the fine grain strengthening effect.
The grain size is about 2 μm.

Effect of а Number of Transition Metals on the Cohesive Properties of Cr-Ni-Base Alloys V.N.
By analogy with Ni-base superalloys the bulk and grain boundaries cohesion in γ – phase of the Cr-Ni-base alloy (I) were strengthened by adding a package of the “low alloying” elements (Zr, Hf, Nb, Ta) (alloy II) chosen in accordance with our theoretical predictions.
The value of grain boundary (GB) cohesion one can estimate using the work of GB separation Wsep in accordance with the Rice-Thomson-Wang approach [7, 8].