Search results

The appearance cross sectional area was directly obtained from the image based on the total number of pixels enclosed by the boundary [13].
The carbides at grain boundaries block dislocation movements near the crack tip.
It can be suggested that a reduction in number of bigger particle generated could be caused by the microstructure change after the treatment, i.e. the precipitation of finer carbides and the more uniform carbide distribution in the cryogenic treated samples.

Table 2 The differential pressures under different air speeds at a fixed height Particle size [mm] Air speed [m∙s-1] Specific discharge [m∙s-1] Differential pressure [Pa] Pressure gradient [Pa∙m-1] 5~15 7.636 0.815 -454.51 -4545.1 6.394 0.682 -324.65 -3246.5 4.900 0.523 -206.59 -2065.9 3.490 0.372 -94.44 -944.4 15~25 9.432 1.006 -242.01 -2420.1 7.404 0.790 -162.32 -1623.2 5.830 0.622 -94.44 -944.4 3.906 0.417 -41.32 -413.2 25~35 8.432 0.899 -132.81 -1328.1 6.560 0.700 -88.53 -885.3 4.932 0.526 -44.27 -442.7 3.306 0.353 -21.25 -212.5 35~45 7.940 0.847 -101.48 -1014.8 6.426 0.685 -76.73 -767.3 4.820 0.514 -38.37 -383.7 3.396 0.362 -16.53 -165.3 In order to preliminarily understand the state of airflow in the model, the Reynolds numbers (see Table 3) of the seepage in broken rocks were calculated according to Eq. 2 [11]
Table 3 The Reynolds numbers under the conditions of different porosities Particle size [mm] 5~15 15~25 25~35 35~45 Re 254.9~557.8 570.8~1376.9 724.7~2283.7 990.9~2318.6 Table 3 shows that Re >10.
Influence of grain shape on characteristics of pores and seepage in porous media (in Chinese).

The most promising technologies have been engineered to a higher level and are now used for the production of prototypes, parts or models in a great number of applications [1-3].
The advantage of laser-aided rapid solidification will be taken to give rise to the finer grains and less macro segregation in the microstructure of the as-deposited parts, so the mechanical properties of the parts might be even higher than those of which are made by conventional methods.
The LMDS has a number of advantages over previous RP&M techniques including more robust deposition, more accurate placement of the deposited material and the ability to produce functional gradient materials by simply mixing powders during deposition.

The waste drawing lubricants have been included in National Hazardous Wastes Catalogue with the number HW09.
The treatment of drawing lubricants, just like many other kinds of metal-working fluids, is important in a large number of industries.
Iron-carbon as a primary battery has been one of the most effective micro-electrolysis methods, among which the iron scrap was typically studied mainly for the treatment of dye-printing wastewater with following advantages: (1) Instead of industrial material, waste iron scraps can be used as iron-carbon grains to be cost-efficient. (2) The primary batteries can be formed and work by themselves with no need for power supply and addition of chemical agents.

Introduction A grate number of the engineering applications requires a surface layer which is very hard and strong, with a high wear-resistant, but on the other hand has relatively soft interior structures contributing a proper ductility.
Properties of WC and BN powders Powder Grain size, µm Melting temp., °C Density, g/cm3 Structure Hardness, HV WC 80 2870 15.69 hexagonal 3400 BN 2 3000 2.25 regular 2000 a) b) c) d) 3 mm 3 mm 3 mm 3 mm Fig. 1 Trace of the laser tray of the a) surface layer after WC powder feeding into the AlSi9Cu alloy, laser power 1.5, kW, b) 32CrMoV12-28 steel remelted with BN powder, laser power 1.6 kW, c) 32CrMoV12-28 steel remelted with BN powder, laser power 2.0 kW, d) X4032CrMoV5-1 steel remelted with BN powder, laser power 2.2kW Structure investigation was performed using the light microscope Leica MEF4A supplied by Zeiss in a magnification range up to 1000x.
Acknowledgements This research was partially financed within the framework of the National Science Centre under grant decision number 2011/01/B/ST8/06663 headed by Dr Eng.

Zirconia minerals are found in granular form which is a breakdown of acid igneous and metamorphic rocks which are then transported, concentrated and sediment with zircon grains including calciterite (the main mineral of tin), rutile, ilmenite, pyrite, magnetic, gold and iron oxides [1].
Langmuir was developed assuming that a fixed number of accessible sites are available on the adsorbent surface, monolayer adsorption occurs, which its adsorption occurs when molecules adsorbed on the surface of adsorbent form a saturated layer.
Acknowledgment This work was financially supported by a grant from the Directorate of Research, Technology, and Community Service, The Ministry of Education, Culture, Research, and Technology, Republic of Indonesia, and the fund for Excellence Research University Grant (Contract Number: 113/E5/PG.02.00.PT/2022).

At the time t=0.018s, a number of approximately equal length of the horizontal and vertical cracks with approximately equal length in the coating can be seen, indicating that the coating begins to cracking.
When the critical times reaches, a greater number of creaks exist but no cracking throughout occur in the coating.
Crack-Interface Grain Bridging as a Fracture Resistance Mechanism in Ceramics: II, Theoretical Fracture Mechanics Model, J.

The size and number of micropores decrease as the increasing of current density.
Molybdenum species may be transported along short-circuit paths, such as grain boundaries, cracks and micropores [13].
This caused the size and number of the surface micropores and porosity of the MAO coatings decreased, and the cracks of the inner MAO coatings increased.

The most simple and reliable one is ring-down counting, where the number of times the voltage from a transducer exceeds a specified threshold level is counted.
However, the dependence of the number of counts upon the absolute threshold voltage used for the test limits the usefulness of this analysis to comparative studies [6].
The possible phenomena can be the glide of dislocations, grain-boundary sliding, dislocation climb and Herring-Nabarro creep.

grain boundary migration, the dynamics of structural transformation, motion of deformation bands, residual strain (stress), and fracture).
An increase in the dislocation density, while the number of solute atoms remains constant, increases effectively the length of dislocation segment between weak pinning points and hence the δH component should increase, which is observed.
It should be noted that number of free solute atoms or their small clusters in the matrix may be influenced by thermodynamic processes in the matrix.