Search results

The data was compared in terms of their parallel evolving morphology and the thermal diffusivity.
The reduction in grain size in the initial stage of sintering was subjected to the rearrangement of particles and also due to carbonate decomposition.
Thus, the thermal diffusivity values displaying reduction of thermal diffusivity at high temperature even for the same nanosized grains.
The presence of porosity significantly reduced the thermal diffusivity, due to reduction in thermal conduction pathways [11].

Reduction of these unwanted effects by optimizing the parameters of the system leads to efficiency of abrasive water jet cutting process.
Machinability used by IntelliMax software for different types of materials is the OMAX machinability whose data were used in drawing graph presented in Fig. 2.
Optimization results in increased dimensional precision, increased surface quality, increased durability nozzle, reducing the cost price, reduction of scrap, reduction of abrasive consumption.

Data obtained from XRD testing were also utilized for calculating the residual stress that were present in the specimen.
The test result shows that there is a slight hardness reduction in 300oC annealing temperature specimen due to small gap between annealing and the recrystalization temperature which is at 290oC resulting only in recovery process (the first stage of the annealing process) [10].
On the othe hand, there is no significant hardness reduction from 500oC to 600oC annealing temperature which implies that recrystalization process is finished and only grain growth was occurred [10].
This phenomenon is corresponding with the experiment, which was done by Kabash, where brass alloy is experiencing a notable drop between 400oC and 500oC followed by slight reduction after 500oC annealing temperature.

The reduction may arise from irregular distribution of fly ash in the composite.
Obi et al. [10] and Bieniaś et al. [11] reported the reduction in Ecorr as fly ash content increase in Al-Mg alloy and Al-Si based alloy respectively.
Fig. 5 Potentiodynamic polarization curves of different specimens in 5wt% NaCl Table 3 Electrochemical data of Al6061-fly ash composite Sample Ecorr [V] Epit [V] Icorr [µA/cm2] Al6061 -0.66 -0.60 1.42 5 wt% fly ash -0.90 -0.61 2.44 7 wt% fly ash -1.05 -0.62 4.23 10 wt% fly ash -1.21 - 8.60 Fig. 6 shows typical SEM images of the corroded surfaces of Al6061 and Al6061-fly ash composites after the pitting had taken place.
According to Marin et al.[17] EDXS analysis, there was a significant reduction of Ca after corrosion tests in Al-fly ash composite.

Afterwards, the reduction and oxidation peaks were determined.
According to electrochemical data can have been calculated specific capacity, conductivity, and diffusion of sodium ions can be given equation [12] [13] : Csp =∫I.dVMe.V.
EDX Result of Elemental Content Element Percentage (%) Na 18.00 Fe 10.14 P 14.47 O 57.39 CV testing was carried out to determine the existence of a reduction and oxidation process which afterwards would be displayed in the form of a voltammogram curve.
Nonetheless, there is no visible reduction and oxidation peaks on both curves, hence it cannot be determined whether a redox reaction occurred in these two samples.

The conclusion that the stability of color index and the longer storage time of the low chlorine shellac samples was safely drawn up from the experimental data mentioned in this paper. 2.2 Results of ultraviolet spectrophotometer test The samples of seedlac,shellac and low chlorine shellac obtained by catalytic hydrogenation with Pd/C were dissolved into ethanol 95%(volume %) and then scanned by ultraviolet spectrophotometer.
Why there is feeble difference of the maximum absorption between the shellac and the low chlorine shellac is due to not only the promotion as well as the unsaturated structure although most of chlorine are substituted while dechlorination catalyzed by Pd/C takes place. 2.3 The mechanism of catalytic hydrogen dechlorination by Pd/C H2 is a dull reduction agent during the hydrogen reduction processing of shellac for dechlorining the chlorine compacted in it.
Hydrogen is easily absorbed by palladium on its surface, and then decomposed into hydrogen atom with intensity reduction, which accelerates the dechlorination.

Table 1 Differences in the criteria for existing and new structures Criteria Existing structures New structures Economical incremental cost of increasing the structural safety is commonly high incremental cost of increasing the structural safety is commonly lower Social may be significant due to reduction or disruption of serviceability and preservation of heritage values commonly less significant than for existing structures Sustainability in large measure existing materials are used, leading to reduction of waste commonly new materials are applied Recent reliability assessment of structures of two lateral halls of the ice-hockey stadium in Liberec, north part of Bohemia, can serve as an example of such a procedure.
It should be noted that some CEN countries apply a bigger reduction factor for existing steel structures.
A more developed procedure of the risk management could be a long-term monitoring not only of the snow but also of the actual structural behaviour including deflections, deformations or cracking by means of laser measurement devices in selected places of the stadium, and transfer of the data to computer and their evaluation with respect to specified limits.

A substantial reduction in the grain size of aluminum alloys can be attained through severe plastic deformation (SPD) [2,3].
Then rods were subjected by rolling with a reduction of ~0.86at room temperature.
In the data presented, high angle grains boundaries (HAGBs) were defined as q³15° in misorientation and low angle grains boundaries (LAGBs) as 3°It may be indicative for decreased contribution of grain boundary sliding (GBS) to total elongation which is confirmed by a reduction in the m value with strain (Fig. 7.).

Method Analysis and interpretation of symptoms observed during the treatment of the refractive errors of the first author eyes, using light stimuli corrective lenses and predetermined movements with the eyes or head to find a scientific justification compatible with the literature data.
After many repetitions of these procedures he found a reduction in the number of superimposed circles.
The settling movement of the lens, an increase in the thickness of the lens causing a reduction of the diameter of the lens [4] Fig. 1a there is a reduction in its volume (accommodated) and Fig. 1b there is an increase in its volume (unaccommodated) this is being considered, by hypothesis, as the mechanism of forced convection transfer of nutrients (does the unaccommodated) and elimination of metabolic wastes in the lens (does the accommodated).

This is supported by mechanical strength data.
Furthermore, a more uniform distribution of unhydrated cement particles in the cement matrix, without significant depletion near aggregate surfaces, as well as a reduction of the ITZ, are reported [8].
Kim [8] found a significant reduction or even elimination of the Ca(OH)2 crystals that normally coat the aggregate surfaces and their possible replacement by C-S-H in PVAA modified mortars.
The reduction in Ca(OH)2 on aggregate surfaces probably arose from the inhibition of crystallization nucleation of calcium hydroxide by adsorbed PVAA.