Search results

The kinetic coefficients ki,j are determined by the diffusivities of droplets that in turn depend on the number of atoms in the islands [12]:
The rate of atom evaporation is determined by the attempt frequency α0, the activation energy of desorption Edes, and the number of atoms on the surface of droplet ni.
Fig. 4 demonstrates the dependence of the droplet number on the substrate surface on the normalised annealing time for different values of the evaporation rate of atoms from the droplets.
The saturation is likely caused by two reasons, namely: (i) the decrease of droplet mobility due to the increase of their size and (ii) the decrease of droplet number so that their collisions become less probable.
From the curve of the calculated dependence of relative droplet density on the normalised time of annealing, the normalised time values τ0 corresponding to the experimentally observed normalised grain densities were determined for different RTA temperatures.

Secondly, it is difficulty to testing the software independently for the developer when the testing task needs large number of concurrency, data volume and time-consuming.
Virtualization is characterized by resource sharing, resource customization, fine-grained resource management.
Application of cloud platform management technology can make numbers of servers working together efficiently, service deployment and provisioning conveniently and discovery and restoration fault quickly.
Testing platform can simulate numbers of operations such as concurrent accessing and uploading simultaneously.
Users only need to provide testing requirements, such as the number of concurrent users and concurrent operation.

Introduction Fine-grained cement-bonded composite materials reinforced with dispersion reinforcement (steel fibres) of the Ultra High Performance Concrete (UHPC) type continue to be among the promising materials in the construction industry.
The number of fibres in each scanned layer was determined.
The number of air pores is clearly visible in the photographs of their sections (Fig. 4). 3) Based on the different air content, a slight change in the compressive strength of the concrete is also evident.
Acknowledgements This contribution is the result of the research supported by the research project GAČR number 21-24070S Model of fibre segregation in dependence on rheological properties of fresh HPC.
Cement and Concrete Research, Volume 124, Article Number: UNSP 105828, Published: OCT 2019.

However, a number of other nano-composites are also playing a critical role in the charge transport process which lead to improved device performance and device stability.
While synthesizing the carbon nano tube (CNT) in p-type semiconducting polymers a number of possible functionalizations are possible.
Ø Enhance the crystallinity of perovskites and help achieve large grain size.
Ø Enhances in light absorption through plasmonic effects Ø Nanoparticles acts as distributes at the grain boundary, passivating the perovskite film minimizing the nonradiative recombination.
Particularly, metal nanocomposites have been employed in a number of cases which have generated significant impact on performance and stability of the solar cell devices.

Natural pearls are formed when a small foreign object, such as a parasite, grain of sand, or piece of food, lodges itself in the gonad or mantle tissue of a mollusc or oyster.
Measurements: X-Ray Diffraction (XRD) analysis was carried out for grain size determination of nano crystalline materials and peak profile analysis on fine powder of pearl sample to investigate its microstructure.
The small spikes in the XRD pattern indicate the presence of small sized grain in it.
The functional group region shows absorption marked wave number between 4000 to about 600 cm-1 as shown in Figure 5.

Chip formation study will always be relevant in analyzing metal cutting because it present the grain deformation pattern in the chip morphology, enhance the understanding of the Built-up-edge (BUE) phenomenon and it makes clear the alteration of tool geometry due to tool wear [7].
It has 1.5GPa compressive proportional limit and grain size varying from 1-2μm.
Also, the localized shear bands were absent and the grains became squashed and stretched as they pass through the chip root zone.
Submitted 16 March 1987, published 30 March 1990,Bulletin No 12,(1990). p.2, author’s certification number 1553254 of USSR.

Trace V is added to refine the grain.
Abrasive grains were revealed in the blade flank, resulting in the abrasive wear, which is a standard mode of the tool wear associated with the entire cutting process.
The multi-layer structure of the M3 coating exhibits a large number of interfaces and a smaller grain size.

We used the model proposed by Koops, according to which the sintered polycrystalline material consists of grains and intergranular layers.
Moreover, the electrical resistance of the latter is much higher than the resistance in the bulk of the grains due to the different content of Fe2+ ions in crystal lattice [37, 38].
To ensure a change in the valence of such a number of iron cations, ~ 5 % of oxygen atoms must evaporate.
Hu, Investigation of grain growth and magnetic properties of low-sintered LiZnTi ferrite-ceramics.

The considerably high strain-hardening rate of the Al-6Si-3Cu-0.03Sr-0.5Ni alloy in the early stage of plastic deformation as indicated in Fig. 6, should be attributed to the dispersion of fine intermetallic particles inside grains and around grain boundaries, which resisted slip in the primary phase and grain boundary sliding [18, 19].
The river marking was the result of the crack moving though the dendrites along a number of parallel planes, which formed a series of plateaus and connecting ledges.

The doping elements might enter the gap of the lattice structure of TiO2, or replaced a small number of the elements on the lattice [5].
The average grain size of the doped TiO2 was 17.57 nm according to the Scherrer equation (2) (2) where D was the grain size, k the grain shape factor, about 0.89, λ the X-ray wavelength (Cu Ka radiation, 0.154056 nm), β the full width at half maximum (FWHM) of the anatase (101) diffraction line, and θ the anatase (101) Bragg angles(2θ).