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As a result, in recent years, a growing number of academics have studied popular issues such as CO2 injection into the seafloor[5, 6], CO2 separation from flue gas[6, 7], and methane hydrates replacemt by CO2[8, 9].
Grains forming sands were of spherical shape with average diameter equal to 200 μm.

For fatigue test a pole shape specimen was applied to a tensile-tensile test (180MPa/180(R=0.1)) on MTS 810 machine to measure the number of cycles at fracture in the stress.
It is well reported that the mechanical properties would be improved with the decrease of grain size and primary α phase size.

In the process of degreasing, there are a large number of pores left in the samples after binder decomposition, which leads to gas infiltrating out from the internal pores of samples[6].
The surface energy of coarse large size grains is low and the contraction is not obvious after heat preservation at 1000˚C for 2h.

The United States and France have excellent structural profiled absorbing carbon fiber used in stealth aircraft [7]. 1.5 Chiral carbon fiber Spiral carbon fiber is a typical chiral material with wide grain size distribution and excellent electromagnetic wave dispersion effect.
Its diameter is 4-30μm and adjustable root number is between 1000~5000.

Based on large numbers of calculation, alloy 3 was found to be a potential ideal alloy for high-temperature vitriol pump.
After solid solution treatment at 1373K+2h and ageing at 973K+2h, the microstructure of alloy similarly consist of austenite and sigma phase, but sigma phase distributed along grain boundary was partly dissolved.

Different magnetic matrices, in the same background field intensity of magnetic field gradient is different, for different fineness of ore grain, magnetic separation effect is different. [7]According to the separated materials, in the background field strength for 1.2 T, choosing different magnetic matrices to obtain the result is shown in Table 3.
So, one-time high gradient magnetic separation can get qualified concentrate, there is no need to increase the number of cleaner.

The number of microcracks decreased with increasing rolling speed and was hardly observed at rolling speed above 1m/min and strip with good surface was obtained.
It was recognized by observation of the cross-sectional microstructure that columnar dendrites grow along the direction of heat transfer from the surface to mid-thickness region and an equiaxed crystal grain is present in mid-thickness region.

Furthermore, the Cu {111} interplanar lattice spacing is always smaller that that of bulk Cu {111}, which implying the existence of nanosized grains of Cu in these films.
It can be seen that )0(ρ has a non-monotonic relationship with volume fraction, which is in agreement with Co-Ag and Co-Cu systems [9], and is far larger than that in bulk alloy system because there exist a large number of (a) (b) Fig.2The TEM analysis of FeNi(32vol.%)-Cu film sputtered at RT (a) Selected area diffraction pattern (b) Dark field image (a) (b) Fig.3 The TEM analysis of FeNi(32vol.%)-Cu film annealed under 573 K.

The increase of initial compressive stress was responsible for the expansion of grains because silanol (Si-OH) is formed by reaction between moisture and oxide film.
Intensity Wave number (cm-1) Fig. 3.

While there have been a number of studies to tailor the properties of aluminum using different types and amount of reinforcement, there has been no attempt made to study the effect of the level of deformation such as extrusion ratio on the microstructure and tensile properties of Al-Mg2Si composites.
Fig. 2a shows a typical microstructure of Al–15 wt.% Mg2Si composite, which according to the pseudo-binary phase diagram (Fig. 2b), consists of dark faceted particles of primary Mg2Si and bright α-Al grains in a matrix of Al–Mg2Si eutectic cells.