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Due to the powder particle properties, a grain size of below 1µm can not be applied in feedstock production.
Acknowledgement The research work described above was mainly sponsored by the Deutsche Forschungsgemeinschaft (DFG) and the Federal Ministry of Education and Science (BMBF, grant number 03N1080B).

Their grain size was 200～300 mesh.
The number of active atoms forming transition layer decreased and their diffusion capability dropped, too.

It comprises a number of shock pressure sensors located in a row beneath a target at which the bullet or projectile is fired, the sensors being adapted to detect the conical shock or pressure wave generated by the bullet or other projectile.
The grain and the bandwidth depend on the values and precision of the and .

Table 1 Shale Physical Properties Test Projects Results Test Projects Results Bulk density [kg/m3] 700 Water absorption [%] 3 Cylindrical compress strength [Mpa] 4.5 Softening coefficient ＞0.8 Grain shape factor ＜2.0 Boiling mass loss [%] 1 Loss on ignition [%] 0.2 Sulfur content (by SO3 ) [%] 0.3 Mud content [%] 0 Organic matte radioactivity qualified Mix Design.
Table 3 Thermal Expansion Coefficient of Some of the Test Data Specimen number Temperature grade Baseline rod reading Test result Par changes 1 25 0 24 24 24 0 50 0 26 25 26 2.5 75 0 28 28 27 4.4 100 0 31 31 31 6.5 2 25 -0.3 7.1 7.0 7.1 0 50 -0.5 9.2 9.4 9.1 2.4 75 -0.6 12.1 12.4 12.3 4.6 100 -0.7 14.5 14.2 14.4 6.7 Thermal expansion coefficient, see equation (1): (1) In above: —Room temperature sample length, mm;        —Sample length growth between room temperature and 100 ℃, mm;         —Temperature rise, ℃.

The attenuation degree of analytically pure Fe- based sample increase very slowly with the number of cycles increase compared with Cu- based samples.
a）fresh Fe- based carrier b）reacted Fe- based carrier after 10 cycles c）fresh Cu- based carrier d）reacted Cu- based carrier after 10 cycles Fig. 2 Scanning electron microscope image of prepared carrier particles As shown in fig. 2, the pore structure of prepared Fe- based oxygen carrier get larger after 10 cycles, and the loose structure and big holes can be easily observed on the outer surface, grain diameter are generally within 5um, the sample surface becomes loose and the gas-solid reaction area has increase, which may be induced by interaction of thermal shock and chemical reaction.

They help to reduce image aberrations and the number of components in optical systems.
Truing experiments led to satisfying results concerning the tool’s shape but also induced insufficient grain protrusion resulting in considerably reduced material removal rate.

The broadened diffraction peaks are indicative of the ultrafine grains.
Nanometre particles have better electromagnetic wave absorbing properties than large particles, because there are a larger number of particles in a certain volume and multiple reflections and stronger scattering to the incidence wave caused by relatively large reflection and scattering cross section.

Followed β-forging was β annealing and water quenching of the ingots to allow for recrystallisation of β grains.
Also from Table 3, it can be seen that plate numbers X5, X6 and X8 have higher V50 values than that required by STD46077.

They have attracted the attention due to low cost and flexibility associated to their production; simplicity; large number of detectable gases.
The sensing mechanism of ZnO belongs to the surface-controlled type, in which the grain size, defects, and oxygen-adsorption quantities play important roles in sensing response.

It is well known that the precipitation of the chemical compound phases on the grain boundaries leads to forming precipitation hardening effect.
At this temperature the chromium atom difussivity can start to be more significant and the number of localized CrN and CrC precipitation phenomena or called as sensitization phenomena may occur resulting in decrease in corrosion resistance.