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Though some equations of the relation between the permeation and the grain composition of coarse-grained soil have established, the permeability is still hard to calculate exactly as the composition of the material is too complex.
Maintain the porosity between the soil particles in the sample and insert different number (nlarge) 2 mm radii large rock particles, the samples including 1, 4, 9, 16, 25 large rock particles created, some created samples showed in fig.3.
(a) without large rock particles (b) rlarge=2 mm, nlarge = 25 Fig.4 Profiles of pressure versus horizontal coordinate at various times (a) rlarge=1 mm, nlarge = 25 (b) rlarge=2 mm, nlarge = 25 (c) rlarge=2 mm, nlarge = 9 (d) rlarge=2 mm, nlarge = 16 Fig.5 Pore-pressure distribution (green circles) at end of simulation Fig. 6 shows permeability of assembly including different diameter large rock particles and different number large rock particles.
Fig. 6 (b) denotes that permeability decreasing with the number of large rock particles increasing first, and increasing while number of large rock particles enlarge to 16.
rlarge=2 mm nlarge = 25 (a) (b) (c) Fig.6 Permeability with different diameter and different number large rock particles Conclusions The particle flow method is used to study the permeability of soil and rock mixture influenced by the large rock particles.

Furthermore, in addition to retarding diamond graphitization, at high temperatures, molten Si penetrates the existing pores between diamond grains causing greater cohesion and hardness to the final compact.
Table 1 presents the Vickers microhardness and the density of the composites for different number of sintering cycles.
Table 1 – Physical-mechanical characteristic of the composites Number of Cycles Microhardness HV (GPa) Density 1 35.0 3.21 2 38.0 3.40 3 39.5 3.49 4 39.0 3.38 The weight loss (abrasion resistance) of the samples according to the number of cycles is shown in Fig, 3.
Figure 3 - Relationship between the weight loss as a function of the number of sintering cycles.
· The number of sintering cycles improves the thermal behavior as well as the properties and results in less porosity.

Introduction Equal-channel angular pressing (ECAP) has attracted increasing attention in recent decades [1] because it is an effective method for the grain refinement of metallic materials.
Therefore, damage may occur when the number of passes exceeds 2.
Variations in maximum damage factor with number of passes.
The number and intensity of surface fractures increased with number of passes, a phenomenon that corresponds with the simulation result.
The number and intensity of the cracks increased with increasing number of passes.

The mycelium composite samples were placed in a nylon netting and then buried in potting soil with a grain size of 2 mm for different time-intervals ranging between one and sixteen weeks.
The soil can be processed by adjusting the pH value, grain size, water content or the composition.
The only parameter changed in this work was the grain size which was set to 2 mm; soils with a small grain size have higher humidity levels and thus ease microbial activity.
Even though a more in-depth experimental campaign and analysis might be required, this research proved that mycelium composites disintegrate in soil and thus strengthened the claim of their biodegradability. 6 ACKNOWLEDGMENTS This work was supported by the Vrije Universiteit Brussel and funding by Research Foundation Flanders (FWO-Vlaanderen) [FWO-SB PhD fellowships to Elise Elsacker (grant number 1S36417N) and Aurélie Van Wylick (grant number 1SA9721N)].

Ginseng saponin Rb1 (The number was 120829 and purity > 98%) was obtained from Shanghai grain medicine technology development Co.
Ginseng saponin Rb1 (The number was 120829 and purity > 98%) was obtained from Shanghai grain medicine technology development Co.
Acknowledgements We would like to thank the Guangxi national normal college scientific research project (project number:2012XYYB002) for funding this research.

Optimal dip times can lead to a more uniform film morphology with well-distributed grains, while very short or excessively long dip times might result in uneven grain size distribution.
Dislocation density measures the number of dislocation lines (crystal defects) present per unit volume of material [2, 3, 6, 23-30].
High microstrain and dislocation density implies a significant number of lattice imperfections and potential strain-induced instability within the nanoparticle.
These smaller grains become large grains of the size up to 320 nm having columnar shape in Mn doped Cu2S layer after heat treatment in air atmosphere.
The grain boundaries are modified with an increase in surface roughness.

Consequently, these 90X-series alloys are susceptible to accelerated stress-assisted-grain-boundary-oxidation (SAGBO) as well as a high rate of general oxidation.
Fig. 4 compares grain size versus temperature for alloys 718 and 783.
The plot shows that whereas grain coarsening in alloys 718 and 783 starts at temperatures around 1000°C and 1100°C respectively, alloy 783's grain size is effectively stable and unchanged even at exposures for much longer times reflecting the importance of the high β solvus.
Grain Coarsening of alloys 783 and 718 0 2 4 6 8 10 12 800 850 900 950 1000 1050 1100 1150 1200 Annealing Temperature, °C Grain Size, ASTM # 783 / 1h 783 / 24h 718 / 0.5hWork Hardening of Alloys 783 and 718 0 100 200 300 400 500 0 10 20 30 40 50 Percentage Cold Work Vickers Hardness Number 783 718 Fig 4.
Grain versus annealing temperature for alloys 718 and 783 Fig 5.

As can be seen in Figure 4, plenty of grains fall off from the matrix of zirconia, leaving big flaws on the surface.
Fig. 3 Schematic diagram showing the low temperature aging process of zirconia ceramic (the white grains are tetragonal phases, gray grains are monoclinic phases) ISO standard 13356-2008 gives specific requirements to the aging resistance of Y-TZP implant for surgery.
Microwave sintering has a number of advantages compared to conventional heating techniques.
Dental 3Y-TZP ceramic is still lack of translucency due to the light scattering caused by voids and grain boundaries.
The conventional pressureless sintering processes usually result in significant grain coarsening of ceramic and is time consuming.

The grain in Mo-TiC alloys shows different degree of polyhedron shape, and the grains are obvious and three-dimensional.
The grain boundaries show smooth and non characteristic morphology, so they are intergranular fracture.
However, the grain in Mo-TiC-Cr alloys exhibits a flat fracture surface, which suggests a transgranular fracture mode.
The solid solution of Cr in molybdenum increases the grain boundary strength and transgranular fracture occurs when the grain boundary strength is higher than the intragranular strength.
There are a large number of Mo2C generation under the sintering conditions of 1700℃ and 30MPa.

Poulton’s reagent was used to etch the sample for grain size measurement.
An addition of Er did not affect grain size.
The number of intermetallics that decomposed into the matrix increased with solution treatment temperature and became solid solution.
• Er addition did not have a role in grain size reduction.
However, further grain refinement can be conducted by other methods