Search results

From the image we can see spindle-shaped ZrB2-ZrC nano-powders with grain sizes ac. 100 nm long and ac. 50 nm wide, and several agglomerations appear.
This novel method without forming a large number of colloidal particles connected via van der Waals force.

A large number of engineering components are subjected to solid particle erosion. [1].
At high temperature, the bond strength between grains decreases which may be resulted in higher erosion rate.

The cutters are solid ultra-fine grain tungsten carbide 2-flute straight end milling cutters.
Total number of elements is 2600.

-Ti doped did not change the morphology and the material show small grains particles. [7] In this research, we will study the effect on the phase, morphology, and crystallite size of the doped NMC 333 cathode materials.
As is shown in Fig. 2(a-b), diffraction peaks were revealed that both synthesized samples possess a pure and single phase of hexagonal structure with a space group of R-3m which in agreement with an ICDD pattern number, 01-070-2685 for lithium cobalt oxide (LCO).

At that, we managed to avoid the concentration of free carbon along the locations and edges of carbides’ grains and to prevent cracking of the surface caused by residual thermal stresses, which is characteristic of LEHCEB influence on carbide material without microallyoing (Fig. 4a).
When using impulse electron beams, energy losses for revert diffusion depend on the atomic number of the target, the energy and the angle of electron beam, and they are within the range of 8 to 50 %.

Table 1 - Regression equation for mean wind velocity at 50 m above ground [6] Wind territory Regression equation I v50 = 0,002 . h + 3,8 II v50 = 0,002 . h + 2,7 III v50 = 0,002 . h + 1,7 Fig. 1 Territory of Slovakia and wind territory for determining mean wind velocity Table 2 Correction factor k given the roughness of the terrain [6] Terrain Roughness k High High 50 m 10 m Smooth surface - water surface, sand 1 1.00 0.80 Meadow with low grass surface, plowed field 2 1.00 0.77 High grass, low grain crops 3 1.00 0.75 Vegetation tall crops, low forest cover 4 1.00 0.71 Forests with many trees 5 1.00 0.64 Villages and small towns 6 1.00 0.46 Big cities, urban centres 7 1.00 from 0.26 to 0.38 For the conversion average wind velocity at 50 m above ground v50 in m/s on yearly course from month to month the factors are used in accordance Table 3.
The calculation is according to EN ISO 13790 [3] using normalized evaluation conditions (number of day degrees for the office building is D = 3104 K.day).

The loess at Qingshuihe County ,Inner Mongolia Autonomous Region, China is yellow powder soil formed during Quaternary period, with particles distribution(grain diameter 0.075-0.005mm) content being 60% above [6].
Classic earth pressure theory consists of Rankine theory and Coulomb theory, and a large number of project cases indicate that the active earth pressure calculated according to Rankine theory is partially large, while the active earth pressure calculated according to Coulomb theory is partially small.

And have started a large number of key projects for water conservation in Loess Plateau region.
But if corresponding livelihood support and compensation measures are not provided for the masses, such as encourage backyard, built grain ration farmland, development of small avocations etc, the project follow-up development and sustainable cannot be assured.

Notwithstanding these difficulties, as mentioned before, thixoforming of wrought Aluminium alloys guarantees certain advantages that give reason for the high number of researches.
A reduction in grain size and the presence of a more globular microstructure can be observed.

Fracture toughnesses have frequently been measured for rocks of various types [4, 5], but predominantly in the form of crack initiation toughnesses KIc; only a limited number of publications exist on the dynamic fracture behaviour of rock [6].
This rock type is very homogeneous (monomineralic, 99 % calcite, micritic - grain size < 5 µm).