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At the end of the line the particles are so small that the interaction of the grains with the tile is smaller than the depth for chip formation.
The circularity factor of a certain number of particles is a reference to provided quantitative information about the particle shape [12].
Sharp grains are specially desired in the plain honing process because of the large contact area between the fickerts and the ceramic tile.
Due to the sedimentation of the grains, it was not possible to analyze the size distribution of the larger particles in the laser diffractometer.
These size variations are inherent of manufacturing process, in which the classification of various grain sizes is done by sieving, where grains with different shapes can pass through the mesh depending on its position.

Coatings that combine a number of properties such as wear resistance, cavitation and corrosion resistance are of great practical importance which is important in the operation of such parts as the rotor of turbines and electric motors; housings and rods of load-driven pumps and compressors.
Thus to obtain a surface with a minimum roughness it is optimal to use small grained powder.
The firmness mark to IGC by metallographic control was thought as the destruction of grains boundaries at maximum depth up to 30µ.
The corrosion in type of grain boundary destruction and the cracks were not found in all three experienced compositions but the powder composition PR-30Cr13:PR-Cr4ГMnSiB (3:1) (Composition №3) on the base of iron after testing in such conditions has more flocculent structure on the tested surface and that allows to view a tendency to corrosion of such build-up because of adverse influence of bigger dendritical colonies, uncontrolled increase in carbon content connecting chrome in separate carbides lowering the concentration of chrome both in solid solution and in grain boundary area.
As a result, the chromium content in the border areas of the grain becomes less than 12.5%, which is not enough to ensure corrosion resistance.

It is seen that a number of recrystallized grains began to appear in the deformation bands after annealing at 650°C for 30min in both the non-field and field treated specimens.
In iron [15], {111}<112> oriented crystals have a 30°<111> orientation relationship with {111}<110> oriented matrix (∑13b CSL grain boundary).
In general, CSL grain boundaries have lower interfacial energy than random grain boundaries.
So, at the initial stage of recrystallization, {111}<112> oriented recrystallization nuclei would preferentially nucleate in {111}<110> oriented deformation grains and then grow in it.
When applying a high magnetic field, the magnetic field will generate magnetic free energy, the magnitude of which depends on the grain orientation.

The grain size was D50=74μm.
Then, the metal Cu2+ ions were deposited on the surface of SiC grains in the solution.
After the oxidation, the new SiO2 coating was formed on the surface of the SiC grain.
Under the same time, HF concentration would impact the coarsen degree of the SiC grains.
When Sn2+ ion concentration was lower, the mutual collision degree between SiCp and Sn2+ ion in the solution was reduced, so the adsorption of the Sn2+ decreased and the number of the adsorbed Sn2+ was low, which would influence the activation process of Ag deposited rate and thickness.

Currently fine-grained concrete is known to be the most widely-spread.
But it has got such shortcomings as high shrinkage, low strength, especially when using fine-grained sands, and others [13-16].
The structure and chemical properties of the HNT surface are sufficiently studied [19-21] and have a number of characteristic features shown.
Kuzmin, Fine-Grained Concrete of Composite Binder, Materials Science and Engineering. 262(1) (2017) 012025
Fokin, Study of Fine-Grained Concrete Modified by Nano-Additive, Bulletin of BSTU, 4 (2014) 6-11

The grains where the martensitic transformation occurred showed a high density of dislocations [6].
The g phase can be observed in the form of thin layers located between bainitic ferrite and small grains located in martensitic areas resulting from the fragmentation of larger austenite grains.
Very small RA grains located in martensitic areas are present on a phase distribution map (Fig. 2d).
Dislocations generated during plastic deformation were reflected as an increase in the number of low-angle boundaries.
Sommitsch, On the microstructural characteristics influencing the yielding behavior of ultra-fine grained medium-Mn steels.

The precipitates began to formed at the grain boundary and other defects after isothermally-treated at 350℃ for 10 s.
With the holding time prolonging, the coarse particles also formed at grain interior.
It consumed a large number of SSSS atoms and vacancies.
In this process, a large number of solute atoms and vacancies were consumed, and the hardness of the alloy sharply decreased.
Precipitation behavior and high strain rate superplasticity in a novel fine-grained aluminum based alloy, Mater.

Experiments were conducted to reveal the effects of different process parameters, such as grain sizes of abrasive particles, machining time, machining gap between the workpiece and the rotation tool, and rotation speed of the tool, on material removal rate of glass surface.
The effects of the grain sizes of abrasive particles, the machining gap between the glass workpiece and the tool, the machining time and the rotation speed of the tool are investigated and the mechanism of material removal are analyzed.
The major influential factors are the grain sizes of abrasive particles, the machining gap between the workpiece and the tool, the machining time and the rotation speed.
The effect of the grain sizes of abrasive particles.
Furthermore, a number of diamond abrasives will escape from the tiny-grinding wheel because of the larger centrifugal force.

Given a one-dimensional discrete time series, 1, , ,iNx x x , one can construct consecutive coarse-grained time series  ()y  determined by the scale factor  , according to the equation () ( 1) 1 1 j ji ij yx         , 1/ jN , (1) whererepresents the scale factor [6].
In other words, coarse-grained time series for scale are obtained by taking arithmetic mean of neighboring original values without overlapping.
Once those coarse-grained time series are built, we calculate the FSampEn to assign a non-negative value to each of them.
The utilized BP neural network is composed of three layers in which the node number of input layer, hidden layer and output layer is 8, 14 and 1, respectively.
Results of BP network with IMSE as feature vector Number of training data 120 240 360 480 Classification rate (%) On training data 97.50 97.08 98.06 94.79 On testing data 84.96 82.29 77.04 73.68 Table 4.

During mechanical activation of lime together with WMS tailings, an increase in the number of neoplasms occurs in the amorphous phase form with a low degree of polymerization, which is confirmed by the acid-soluble SiO2presence, as well as by X-ray phase analysis.
At the same time, the insoluble residue (pseudomorphs) of quartz grains with amorphized shell is not able to go into solution during acid treatment due to the very high anions polymerization degree and high adhesion strength to the grain [21].
The mineral composition of WMS is composed of quartz grains, feldspars, amphiboles, carbonates, magnetite, hematite, and their aggregates.
The natural sands quartz grains morphology is rounded and smooth (Figure 2a).
The number of neoplasms after grinding to Ssp = 3000–4000 m2/m3 in the binder on quartz sand is up to 10%, in the binder with WMS tailings 17%.