Search results

The obtained effect is due to the formation of a large number of substrates for the heterogeneous nucleation of silicon crystals.
It is also worth noting that structure of the silumin cast from the lowest temperature includes a coarse-grained α(Al)+β(Si) eutectic, surrounded by silicon crystals and oblong precipitates of the AlFeSi phase.

There are a number of basic material elements that constitute a flexible circuit as Figure 1 illustrates: a dielectric substrate film (base material), electrical conductors (circuit traces), a protective finish (cover lay or cover coat), and, not least, adhesives to bond the various materials together.
Lower thickness of EN thickness will produce a more nodular surface morphology giving rise to higher penetration of immersion gold along the electroless nickel grain boundaries.

Increa- sing the number of YSZ particles resulted in larger surface areas of particles, and reduced binders around every particle, thus the bending strength decreases.
Fig. 7 shows a uniform grain distribution with a few isolated pores on the boundary, and straight boun- daries higher density is due to suitable sintering temperature (1873K) and holding time (2h).

Candidate Composites For Structural Gas Turbine Elements A number of composite approaches have been developed to toughen brittle high temperature structural ceramic materials.
When composites were synthesized with elongated Si3N4 grains fracture toughness can reach to 15 MPa m1/2 [22].

Introduction Precision seeding is defined as the placing of desired numbers of seeds at a precise depth and spacing.
Precision seeding is an advanced modern method for planting crops and an inexorable trend of agricultural development, and is an important measure to increase agricultural production and reduce grain production costs Pressing can reduce the large soil pores and moisture evaporation, conserve soil moisture and improve soil capillary action to create favorable conditions for seed germination and growth [2].

The purpose of the research of intelligent steering wheel: In recent years automobile industry develops very rapidly, and road cycling number is increasing year by year, traffic accident also happens frequently, which means a great hidden danger for drivers’ personal safety, the safety awareness for many drivers is weak, and many phenomenon of drunk driving and fatigue driving appeared, which seriously threats the safety of themselves and other people.
As for the really used electrode sensor, the right half part and the left half part in the inner side of the steering wheel are respectively coated with the conductive adhesive that contains Ag fine grain, so as to follow the trail of the heart rate change measured.

However, one can find in literature merely small number of papers reporting research results concerning WC cermets with a Ni or CoCr binder and all of them focused on corrosive behavior.
The three kinds of feedstock powders were consisted of WC of an identical grain size at 0.5-2.0μm.

It can not be changed with the different grain and color in the covered background. ③ The boundary of the shadow will change with the variation of the geometrical characteristic in background surface.
Also, i(x, y) can be calculated as the number of light power per receiving object surface area and can further be represented as [3]:

For the larger molecules, the fact that the time to evaluate the potential goes as the square of the number of sites leads to computational inefficiency.
Results and discussion We have performed off-lattice Monte Carlo (MC) simulations of a system of disc shaped mesogens described above with simulate samples of N =60 particles modeled with the coarse grained pair potential described before.

At present, the method of chemical oxidation is more common, which generally used large scale and high-purity graphite as raw material, that is graphite grain size for 200-1190µm and fixed carbon content is more than 99%, sulfuric acid as intercalating agent, potassium permanganate as oxidant [7].
In addition, a large number of polar groups, such as hydroxyl, ether and carboxylate groups, on the surface of the EG layers were easily processed.