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Since the surface free energy is considered to be a driving force in the sintering process, a number of sintering models have been researched for the initial stage of sintering and the resulting equations can be summarized as follows
(1) Where K1 and w are constant, D is the diffusivity, γs is the surface energy, Ω is the atomic volume, G is the particle or grain size, k is the Boltzmann's constant, T is temperature, t is sintering time and m is a constant depending on the diffusion path.

The properties of BiT have been reported in a number of papers, cited among others in refs [5]-[7].
The values obtained were high, especially at higher frequencies, and they are necessary values for this BiT ceramic material which microstructures that have uniform grain size and good relative density are essential for a DR that is to be applied in microwave antennas.

The main parameters that influence the content of hydrogen in steel are [2]: - moisture content of natural gas used as an adjunct to melt, resulting in some cases to values of 9.7 to 10 ppm of hydrogen in the bath metal from the furnace; - moisture of the carbon used for injecting the foaming slag, coming from petroleum coke fine-grained; - the atmosphere of the aggregation unit (avoiding water leaks in the ladle furnace); - the discharge duration of the steel from the furnace (4-9 min) into the ladle.
Conclusions From the research results a number of conclusions: - the parameters bubbling, duration, pressure and argon flow have a strong influence on the hydrogen removal efficiency; - establishing bubbling ranges for the bubbling parameters so that the values for the hydrogen removal efficiency to be as close as possible to the maximum values; - the temperature increase during the secondary treatment determines the increase of the value to the maximum for the hydrogen removal efficiency.

In recent years a number of reports on color film phosphating process[1-5] which overcame the deficiency in the traditional phosphating, but they also had some shortcomings, such as they used the expensive Molybdate, there treatment costs was higher than traditional zinc phosphating, and the resistance and adhesion of phosphate film corrosion were poor.
Meanwhile, long-chain polymer crystal structure also played a role in the crystal mediation agent, and made the crystal film of very small, dense spherical to instead of the traditional grain large, needle-like crystal film.

Their decomposition temperature was reduced with a number of their 3d-electron.
The metal grains grew rapidly with the annealing temperature as represented in Fig. 3.

Among large number of electrical conduction material, carbon and steel fiber owns good strength and electrical function and electrical and heat function[1-5].
The coarse aggregate chooses pebble with grain size between 5-9mm.

R=2.76×10-11AρZ8/9E5/3, where r is the SiC density (g/cm3); A is the atomic weight (g), and Z is the atomic number.
Thus, other proposed earlier alternative nucleation sites for the SFs such as low angle grain boundaries [8], and localized defects in the near surface region, attributed to clusters of impurities [9] should be explored in future work.

In this building, the traditional hollowing, the grain of ceramic and the brilliant red colour in Chinese traditional culture are blended in with the age's most advanced steel structure design in a perfect way.
Today, an increasing number of watch brands choose to expose the tuning part, the counterweight, and the balance wheel clearly.

For the JCPDS file number 01-086-074 and 00-003-0223 corresponds to calcite and cellulose phase, respectively.
The morphologies of the eggshells is seen that the ES-M samples have the porous scattered all over samples and the pattern like stack of lamella foliated and disoriented foliated grains.

A number of service benefits can be achieved in terms of mechanical, electrical and thermal properties and enable their applications not only in the initial military field, but also in aerospace, automotive, electric, chemical and transportation industries [2, 3].
The proposed strengthening mechanism of MMC-GNS composites are grain refinement, Orowan strengthening, load transfer from the matrix to GNSs and increased dislocation density [5].