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The crystal grain size is calculated according to the following Eq.1: )cos/( θλ BL = (1) Fig.1 XRD patterns of the Mg,Al-hydrotalcite with different amount of ZnCl2 (a) 1mol% Zn 2+ doping (b) 15mol% Zn 2+ doping Fig.2 TEM photos and the electronic diffraction of the Zn 2+-doped Mg,Al-hydrotalcite where B is the diffraction line width, λ the wavelength, and θ the Bragger angle.
The samples are nanosize flake crystal grains.
Moreover, the number that Zn 2+ ions enter the octahedral structure space of the hydroxyl (OH ) and replace Mg 2+ ions is limited.

The fillers selected in this paper are SiO2, NaOH, grain graphite and white carbon black.
And the grains of composites obtained by cutter are molded to be standard sample for compact property test at 220℃{TTP}8451 ～240℃{TTP}8451 .
China Standard Number, China Standard Press, 2006

Traditionally, size distribution was determined through mechanical sieving for coarse grained material and sedimentation for fine grained material.
The time consuming sedimentation test makes it an unfavorable method nowadays especially when a large number of tests need to be carried out within a short period.

Single particles are larger than those of before annealing and the shape and size are consistent, evenly distributed, not prone to the phenomenon of a large number of particles aggregated together to form clusters, Surface topography is also many flat.
This makes the grain boundary in the growth process to produce a lot of stress and dislocations and other lattice defects, resulting poor denseness of the grain, and prone to voids and clusters.

After heating the samples at 400 °C formation of carbides at grain boundaries was observed, resulting in an increase of hardness values by 100 to 180 HV 0.1 compared to values before loading.
The structural analysis of the test samples after different stages of thermal stress points to an increased incidence of carbide particles and grain refinement after the thermal load in the cladding metal.
Change in microhardness values of weld deposits corresponds to the number of thermal cycles.

We express sincere thanks to number of organization such as DSI Inc, USA, Trans Tech Publishers and CBMM, Brazil for supporting student participation.
Taillard, Soon Hyung Hong, Yuyuan Zhao Interfaces & Grain Boundaries M.
Al-Samman, Dong Nyung Lee, Hirofumi Inoue Ultra-Fine - Grained Materials (Prof.

There is also a large number of pores in the material.
This is due to the fact that iron is practically insoluble in aluminium solid solution and therefore has a marked tendency to form brittle phases along grain boundaries.
There were found the intermetallic phase Al15(Fe,Mn)3Si2 on grain boundaries, too.

Till now, a number of methods are known to synthesize nanostructures with different morphologies.
Accordingly, the microspheric CuO grains were obtained Fig. 1C.
A close-up view of the CuO grains microstructures in Fig. 1D reveals that the microsheres are about 300nm in diameter.

Table 2 Optimum asphalt content of other gradation serial number of gradation A B C D E F G Optimum asphalt-aggregate ratio 4.1 4.0 4.0 3.5 4.5 4.4 5.0 Apparent density 2.411 2.431 2.415 2.432 2.361 2.426 2.405 Degree of saturation 72.8 74.5 78.4 76.8 67.9 72.0 76.5 Void ratio 3.89 3.94 3.98 4.61 4.75 4.41 4.35 Flow value 37 39 41 39 38 42 41 Stability 9.0 10.2 11.2 8.5 8.7 9.1 10.3 Determination of the temperature shrinkage coefficient.
Figure 1 Shrinkage coefficient of different mixture gradation comparison (continuous cooling) Figure 2 Shrinkage coefficient of different mixture gradation comparison (intermittent cooling) Compare table 1 and table 2 to analyze the different shrinkage coefficients of different asphalt mixture gradation, it can be concluded that: 1) for different gradation types, the change rules of two cooling methods are almost the same; 2) Shrinkage deformation properties of the mixture designed by volume method at low temperature are better than the one designed by weight, especially the one that has S coarse aggregate skeleton type is the best. 3) For the same skeleton type, the smaller average grain diameter is, the larger shrinkage deformation of asphalt mixture is at low temperature.
Analyze the effect of gradation on asphalt mixture properties of shrinkage at low temperature, for the same skeleton type, the smaller average grain diameter is, the larger shrinkage deformation of asphalt mixture is at low temperature; in order to improve the properties of asphalt mixture resistance to cracking, improving the coarse aggregate consumption can be adopted to form coarse skeleton dense structure and reduce the shrinkage coefficient at low temperature.

Properties and ballistic performance assessment by V50 method of ceramic samples: Corundum 96, Corundum 98, Corundum 99.7, SiC (biaxial and isostatic pressing), SiSiC 1 (biaxial and isostatic pressing), SiSiC 2 (biaxial and isostatic pressing) SiC SiSiC 1 coarse-grained SiSiC 2 fine-grained C. 96 Al2O3 C. 98 Al2O3 C. 99.7 Al2O3 biax. iso. biax. iso. biax. iso. biax. biax. biax.
Label1) Weight (kg) Dimensions (mm) Thickness (mm) Areal Density (kgm-2) 1 K7D10 8.96 400 x 400 18.3 56.0 2 K10D8 9.86 400 x 400 19.3 61.7 3 K10D10 10.78 400 x 400 21.4 67.4 4 K10L11 7.63 400 x 400 20.1 47.7 1) K-alumina, D-duralumin, L-aramid laminate, numbers indicate layer thickness in mm In Fig. 2 a) are shown sample Corundum 99.7 in K10D8 (alumina-duralumin) sandwich arrangement after ballistic tests (7,62x54R B32 API, v = 854 ms-1; 7,62x39 AP8 (WC core), v = 780 ms-1).