Search results

After decreased the EB current of second remelting (from 3 mA to 2,7 mA) and also the hold time between double remelting (from 300 s to 3s) the number of pores are reduce significantly and the structures are refined in CGDS sample.
These droplets consist mainly of aluminium with small yttrium-rich grains [7].

A number of biodegradable aliphatic polyesters have been developed and some of them are now commercially available because of their good biodegradability.
The probable reason was that a large portion of noncrystallizable units (MD) might be trapped in the crystal lattice as an impurity; when the content of the noncrystallizable units was increased, the crystallizable link of the chains became shorter, and thus the perfect spherulites changed to grain.

A number of laboratory studies have indicated that Ni-based alloy have significant potential in wear critical applications[6-7].
The difference between the hardness of the two alloys could be due to the fact that hard phases and smaller grains of the alloy with the addition of rare earth.

Dewatering of the tailings to produce “dry tailings” for stacking is now being used as an alternative by a number of companies [1], and has already gained well economic and social benefits not only in the gold leaching tailings [2], but also in the other types of tailings such as coal, iron, copper, aluminum and phosphate mines [3,4,5].
Since the pressure filter accepts a wide range of particle size, concentration and viscosity, it is an essential and flexible equipment to treat the fine grains in the tailings.

Figure 4 shows a dark-field TEM image taken from a C15 grain.
For Laves phase, on the other hand, the ideal ratio of the constituent atom radii for the closest packing is 1.225 [15], and the enthalpies of formation for a number of Laves phases show the maximum at the ideal ratio [16], suggesting the Fig. 3 SEM micrographs of an Ir-20Pt-15.5Y annealed at 2073 K for 72 h.

As we all know, the size of grain could effect the formation of crystal.
Acknowledgements This work is supported by Shanghai Leading Academic Discipline Project (Project Number: J51504) and Foundation of Shanghai Institute of Technology (No.YJ2011-30).

In the direct contact test, the material to be tested or its extraction contacts directly with culturing cells, after a period of time, the numbers, morphology, metabolism or function of the culturing cells were evaluated.
Many approaches have been introduced to control the pore size of a porous ceramic, such as the selection of raw materials, control of grain distribution, addition of additives that form opening space in ceramic and so on.

For many glasses and amorphous materials, α is given by[9]: α(ω) =B ( ℏ ω- Eopt)n / ℏ ω (3) where the constant B is a measure of the disorder of the material, Eopt is the optical energy gap and n is a number which characterizes the optical absorption process.
As the Fe content Fv increases in the examined composition, the surface area at the interface between the granular grains and matrix materials increases.

As the volume fraction of solid particles is less than 10% to 12%, numerical simulation can be carried by Discrete Phase Model, furthermore, the model itself has the abrasion formula: (9) where,is the projected area of solid particles to the wall, is the velocity of solid particles relative to the wall, b is the exponent of velocity, is the function of incident angle, is the function of solid particles’ diameter, is the mass flow rate of solid particles, is the number of solid particles.
Fig. 3 Contours of pressure Fig. 4 Contours of velocity Fig. 5 Particle tracks Fig. 6 Distribution of erosion The trajectory of the solid particles can be seen from Fig 5, in horizontal pipelines, because of gravity, some particles accumulate to the bottom of the pipe and cause slight wear near the entrance of the elbow in horizontal pipe, the solid particles get maximum concentration near the exit of elbow, and a “no solid grain area” [6] appears inside of the elbow, which means substantially zero concentration of particles here.

Through the symbol, implication, harmonics, table number, text, and the comprehensive application of artistic to express the happiness of life, joy, peace, win promotion and get rich, fertility and riches.
Giving a person with overall and comfortable feelings; by using different grain appearance size, depth, thickness, form, various textiles link together, formed the silk home textile decoration style’s changing and unity.