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The average grain size was measured by ImageJ software.
The average grain size of the powder was still about 1.5 µm.
The large rod-shaped ZnO grain formations probably arose due to the preferential growth of appropriately oriented ZnO grains.
An increase in the catalyst dosage will enhance the total active surface area and the number of reaction sites on the catalyst surface [5].
As a result, the number of hydroxyl and superoxide radicals increased as well, which facilitated the degradation of the organic pollutants [5].

The macroscopic constitutive parameters of the powder material are obtained on the basis of the meso-scale simulations of a realistic grain-pore structure.
Fig. 1 Microstructure Colored features are grains, black features are pores The above-mentioned examples underline the importance of optimized sintering of materials with tailored structures.
Furthermore, sintering optimization requires multi-scale processing control - both macroscopically (shape distortions, density distribution, macroscopic damage) and mesoscopically (pore-grain structure characteristics).
The number of virtual experiments corresponded to the assumed number of elastic constants.
Grain-boundary and surface diffusion dominate sintering if particles are small enough.

YAG materials has a number of unique properties, the application is very extensive.
Thus, in a certain range of reaction time, the longer the reaction time, there will be a sufficient crystallization time, so the grain will become coarse.
With the increase of the concentration, the particle size increases with the increase of concentration, the Gibbs can be large, the reaction driving force, the reaction is intense, for the crystal nucleation provides energy, making the nucleus grow faster, grain size larger.
Jiang, Unique mechanical properties of nano-grained YAG transparent ceramics compared with coarse-grained partners, Mater.

However, serious pitting corrosion, intercrystalline corrosion and grain-boundary corrosion would occur when cast iron is placed in an aggressive environment such placed in an acidic aqueous solution [11-13].)
Figure 2, (c) showed that the spot corrosion was worse; Figure 3 (c) showed that there were extensive grain-boundary corrosion except spot corrosion.
Fig. 5 Polarization curves of specimen 2 in 1.0 wt% HCl solution There are different phases in specimen 2 and the direction of different phases is very strong and only slight grain-boundary corrosion took place.
Table 4 Corrosion potential and corrosion current density of three specimens in polarization curves Number of specimen Corrosion potential [E] Corrosion current density [i] 1# －0.5223V －5.392e+0A 2# －0.5155V －5.690e+0A 3# －0.4125V －4.541e+0A The corrosion type is decomposing hydrogen corrosion in 1wt% HCl solution.
Which result in the grain-boundary corrosion.

Differences in the process kinetic arrise from the initial state of the microstructure (grain size, solution state).
The fraction of recrystallisation decreases toward the core of the strip, where no recrystallized grains can be found.
Interfaces as well as the friction coefficients mi are numbered beginning at the top of the strip.
Due to the possibility of a high number of individual layers, inhomogeneous deformation states can be approximated using visioplasticity methods.
In dependence to the number of layers, an inhomogeneous strain state in the roll gap can be approximated with a sufficient accuracy.

Scanning Electron Microscopy (SEM) was performed using a Hitachi SU-8000 High-Resolution SEM operated under Back-Scattered Electron (BSE) mode to induce atomic number contrast.
A SEM analysis of the optimally deposited weldments (~1.75kJ/in) displayed in Fig 4(a) and (b) reveals a fine grain structure exhibiting some intragranular precipitates as well as some fraction of solute segregation, indicated by the presence of a second (bright) phase located along grain boundaries.
This second phase is rich in solute elements such as copper, as indicated by the lighter colour displayed resulting from the atomic number contrast and verified through EDS (not shown).
Since visualizing lithium using common microscopial methods is difficult, due to the low atomic number and high fluorescence yield, this inverse correlation allows one to infer some aspects of the behavior of lithium as a solute within the aluminum alloy.
Finally, SEM analysis of the optimal weldments revealed some extent of solute segregation occurring, as evident from the increased copper content at grain boundaries.

The number of dielectric layers is 14.
When temperature descends to T2 and hold a few hours, the pores can be filled by grain boundary diffusion.
The inner electrode thickness and the number of dielectric layers are 1.3~1.6mm and14, respectively.
Sintering dense nanocrystalline ceramics without final-stage grain growth.
Microstructure Evolution and Dielectric Properties of Ultrafine Grained BaTiO3-Based Ceramics by Two-Step Sintering.

In the manufacture process of many large-scaled and complex products assembly, due to large number of parts or components, assemblies are often divided into several small assembly units in order to organize production and increase assembly efficiency.
To obtain fine-grained rapid assembly unit partition, this paper presents a method of assembly unit partition based on cut-set theory with consideration of the assembly constraints and assembly complexity.
If it is necessary to continue, then these steps can be repeated to do more fine-grained partition.

A record number of hexaferrite papers were published in 2011.
Less than half this number of publications actually detail true, single phase hexaferrite fibres.
Fig. 1: Yearly number of hexaferrites publications from 1956-2013 (search using Scopus).
Size of grains indicated by the scale bar.
(III) TEM image of single nanocrystal grains in BaM nanochains/fibres.

Analyses of the Structure Formation of Constructional Complex Mixtures Developed on a Local Raw Basis and Their Behaviour in a Chemically Aggressive Environment Hasmik Karamyan1a, Arkadi Sahakov2b, Araksya Aperyan2b, Marya Badalyan1a, Armine Baghdagyulyan1a 1National University of Architecture and Construction of Armenia, 105 Teryan Street, Yerevan,Republic of Armenia 2National Academy of Sciences of the Republic of Armenia, a 24 Marshal Baghramyan Ave, Yerevan 0019 aqar.has.81@gmail.com, basahakov45@mail.rubaraksya19aperyan@gmail.com, amarya.badalyan@mail.ru,aa.baghdagyulyan@mail.ru Keywords: constructional complex mortar; granite; lime; fine-grained pumice; strength; density Abstract.The article presents the physical, mechanical (strength, density), and chemical characteristics of complex M100 water-resistant mortar compositions, which include crushed limestone (0.16–1.25 mm) and granite-crushed sand.
Additionally, stone masonry mortar mixtures with a grain size of up to 5 mm have been developed using local raw materials for the restoration of wall constructions in building structures.The relationship between the density and chemical stability of the hardened samples was determined using the results of complex research on the structuring process of the test samples obtained with the modifiers used to improve the workability of the processed lime mortars. 
Table 1 The ratio of quantitative values of dissolved Ca2+and Mg2+, and CaO and MgO oxides № Mixture name Ca2+[mg /l] Mg2+[mg /l] CaOMgO CaOCaO' MgOMgO' 1N 2N 1N 2N 1 Plastering mortar [0…1.25mm] 326 673 60.0 93.5 22.38 3.22 1.84 2 Plastering mortar with gypsum composition [0.16…1.25mm] 346 404 71.0 123 9.91 17.73 0.64 3 Injection mortar [0…1.25mm] 280 865 48.8 75.5 11.14 11.74 0.43 4 Hardening mortar [0…1.25mm] 346 923 53.5 80.0 10.70 5.94 0.56 To correctly interpret the solubility phenomenon, the amount of Ca2+ andMg2+ cation dissolution in the composite monolith was estimated by analyzing the CaO/MgO ratio and the number of oxides of the same names of these elements present in the binders and fillers.