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In Fig. 1, internal oxidation process can be described as follows: oxygen adsorbs on the surface of Ag-Zn alloy grain, the absorbed oxygen breaks down into oxygen atoms ([O]), oxygen atoms selectively reacts with zinc at the grain boundary, oxygen atoms diffuse into the grain through grain boundary or volume diffusion which leads to the further oxidation of Zn to ZnO.
And the internal oxidation of Ag-Zn alloy can be considered as the process of the diffusion of oxygen atoms into the Ag-Zn grain and the diffusion of part of Zn atoms to the Ag-Zn grain boundary[32].
A large number of splashing droplets formed a metal belt at the edge of the contact in which the particle size was very small.
At present, the research on Ag/ZnO electrical contact material relies to a large extent on a large number of experimental exploration and verification, which leads to a long period of material development and high cost.
Wang, Microstructure and properties of CuCr contact materials with microcrystalline or nanocrystalline Grains, Rare Matels. 23 (1999) 363-365

Relatively the number of nozzle rows affects cooling rate of flat steel greatly.
Rapid cooling can refine grain and strengthen the organization, therefore, controlled rolling and cooling can cancel the heat treatment process of the conventional rolling process.
The Influence of the Nozzle Row Number on the Controlled Cooling Rate.
The influence of nozzle rows number on flat steel cooling rate is big.
When the numbers of nozzle rows N1 is 2, the cooling rate is the slowest.

According to the particle size distribution shown in the above figure, it is observed that fly ash has a higher concentration of grains in the range between 10 and 100 μm, which characterizes it as a powdery material.
Two types of river sand were adopted for this work, one with an average particle size and the other fine-grained.
Their specific mass are 2.72 gm/cm³ and 2.65 g/cm³, for the medium and fine grain sand, respectively, following the NBR norm 7211/2005.
The rounded shape of river sand grains indicates interaction between the polymeric binder and the aggregate, reducing porosity [2].
Figure 1 below shows the flexural strength values for Floorings 1 and 2 after chemical attack, where the aggressors are numbered 1 through 8 for sodium hydroxide, sodium hypochlorite, sulfuric acid, hydrochloric acid, potassium hydroxide, sodium chloride, gasoline and diesel, respectively.

The results were obtained in terms of cycles number vs stresses, then linear regression was applied as suggested by ASTM E468.
Wet welding microstructure: Ferrite with aligned second phase, upper bainite (FSA), side plate ferrite (FS), and primary grain-boundary ferrite (GBF) Fig. 14.
However, for the grinding depth of 10 mm and wet welding, higher levels of porosity were obtained because such repair conditions needed a higher number of weld beads to fill the grinded material.
Which also shows schematically pores and slag on the total area of deposited wet welding metal in a different number of weld beads.
On the other hand, the porosity can be reduced through higher number weld beads, which implies that the level of porosity can be reduced by the deposition of higher number of weld beads.

It can be understood in terms of a number of available slip systems in bcc, fcc and hcp lattices.
Therefore, there is a high probability to find slip planes in grains, adjacent to the precrack front, which exhibit the Schmid factor comparable to that of the precrack plane with the maximum shear stress.
It can be explained by different numbers of slip systems available in the structures bcc, fcc and hcp.

The porosity of the thick films was decreased with increasing the number of coatings.
The PZT-5 thick film was a porous structure and consisted of mixed grains of fine and coarse structure.
And the PZT-15 thick film was forming the film to crack due to many coating number.
dielectric constant increased with increasing the number of solutions coatings.
The porosity of the thick films was decreased with increasing the number of coatings.

A metal screen filter with 500 mesh was employed to dilute the number concentration of the sprayed droplets.
The Reynold's number of the aerosol fluid was kept at the value of 1,200 to keep a short residence time and a laminar flow. 1.
Introduction A wet chemical combustion method [1-6] has been studied to synthesize fine-grained ceramic particles.
Gallily[19] reported that the number concentration of aerosols can be diluted by using an aerosol filtration system.
To achieve laminar flow conditions, the Reynolds number was maintained at 1,200 by using flowing O2.

Amorphous stoichiometric Ti-Al films are synthesized from one Ti-Al alloy target at room temperature by changing the number of pulses of the arc discharge.
The deposition rate was controlled by the number of pulses of the arc discharge.
Furthermore, the thickness of the deposited films were proportional to the sum of the number of pulsed vacuum arcs that the average deposition rate of TiAl films was estimated about 0.1 nm/pulse (1 pulse/sec).
be a form of distributed discharge in that it shares the same characteristic of producing reduced numbers of macroparticles Fig. 3: XRD patterns of Ti-Al films (a) asdeposited and (b) heat-treated at 700℃ for 1 h flowing under Ar gas, prepared on Si(100) substrate ((●) aluminum titanium silicide and titanium silicide).
Further heat treatment of these amorphous films (Fig. 4(a)) ranging from up to 700℃ under Ar gas gave the polycrystalline films with grain sizes ranging from 100 to 300 nm, as shown in Figure 4(b).

A large number of stainless steels grades are produced and find use based on their design requirement.
Remelting Technologies A number of premium stainless steels are primary melted in vacuum induction melting furnace.
Thermo-mechanical working and adequate forging reduction ensures a fine-grained, homogenous material.
An optimum thermo-mechanical treatment and forging reduction ensures an uniform and fine-grained structure.
This material is forged and hot rolled in a controlled temperature range to result in a fine-grained structure.

Suitable silver dopant can increase the activity which the mechanism is mainly attributed to the change of anatase grain size [9].
Using silver nano-particles leads to increase in number of particles per unit area and maximized anti-bacterial effects [17].
The numbers of viable colonies of P. expansum on each PDA plate were observed.
SEM image shows the agglomerate grains of TSSA1.0 powders (Fig. 3) which have an average particle size of 14 mm and specific surface area of 72.2 m2/g (BET analysis).
FT-IR spectra and photocatalytic activity against P.expansum The infrared spectra of all the synthesized nano-composite powder in the range 4000-400 cm−1 wave number are shown in Fig.4.