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All samples were rotated at 90 ° angle for polishing with nano cloth number 8.
The presence of a smaller amount of precipitates and a grain growth in the ZTA is observed.
Also with the heating of the ZTA there was an increase in the size of the precipitates of the grain contours reducing the interaction between the precipitates and dislocations which reduced microhardness in this region [3].

The large particles were formed as the calcinations process were performed at a relatively high temperature of 950 ºC in a considerably long time up to 5 hours, thus allowing grain growth (coarsening), densification and agglomeration.
The stability of molecules on the surface of particles is low and this condition make surface molecules migrate into solution and decreasing the particle, thus increasing the number of free molecules in solution.
Dense and fine-grained barium titanate prepared by spark plasma sintering, Journal of Physics: Conference Series 1191 (2019) 012039

It is noted that these standards are constituted for metallic superplastic materials having fine crystal grains, in particular for aluminum and titanium alloys.
Kuribayashi, Unified Interpretation of Internal Stress Superplasticity Models Based on Thermally-Activated Kinetics, Acta mater. 47 (1999) 1653-1660. ] and fine grain superplasticity in ceramics [[] F.
The special experimental device limits the superplastic tensile tests to a small number of institutes.

All of the peaks can be attributed to the PZT, according the JCPDS number 33-784.
It can be seen that distribution of the grains is rather even.
The average grain size is about 0.8 mm.

Introduction In recent years, a number of materials with negative thermal expansion (NTE) have been discovered [1-6].
It is shown that both m-ZrO2 (see Fig. 7a) and α-ZrW2O8 (see Fig. 7b) present as fine grains and disperse homogeneously in the composites.
The rest of Y2O3 additive may serve as sintering aids to impede the growth of larger grains of ZrW2O8 and improve the densities of the ceramics.

A further surface SEM observation exhibits that the crystal grain of the film is in the range of 50-100nm.
So the grains in every column are regularly oriented, resulting in crystallographic texture of the film at last. 30 40 50 60 70 80 0 5000 10000 15000 20000 25000 30000 (331) (222) (400) (311) (220) (111) Incidence angle=45 ο Incidence angle=30 ο 2theta(deg.)
It is defined as: 1 . 1 hkl hkl hkl rhkl rhkl I II n I ω = ∑ where Ihkl is the diffraction intensity of (hkl) plane in preferred orientation specimen, Irhkl is the diffraction intensity in random orientation specimen, and n is the number of diffraction peaks.

The numbers on the red lines are the energies relative to reactants in kcal∙mol-1 Chemical reaction rate.
Coarse grains doped with fine grains had secondary nucleation in the diamond growth because that was promoted by a large amount of hydrogen ions in the reaction chamber at a lower temperature.

Table 1 Average microanalysis results by EDS Number Fe Zn wt.% at.% wt.% at.% A 7.75 8.95 92.25 91.05 B 91.23 92.41 8.77 7.59 C 6.93 8.02 93.07 91.98 D 4.51 5.24 95.49 94.76 Fig 2.
The corrosion process of eutectic structure can be described like this: molten zinc enters into the matrix along the grain boundary, then corrodes the α phase first, however, Fe2B phase is seldom corroded for its non-wetting with liquid zinc.
According to the model the corrosion process can be divided into such steps as follows: molten zinc absorbed by matrix and Zn atoms diffuse inward the matrix along the grain boundary→molten zinc corrodes first precipitates α phase immediately→network eutectic structure loses its supportings of first precipitates α phase and spalls off→molten zinc contacts with the α phase again.

SEM examination of the carbide tools used to machine nickel-base alloys has shown a layer of 'distributed' material beneath the crater and the cutting edge [5]; in this layer the tungsten carbide grains being smaller and more rounded than in the original material.
These designs allow efficient estimation of the first and second -order coefficients because Box-Behnken design has fewer design points, they are less expensive to run than central composite designs with the same number of factors.
Heat and pressure generated by machining can cause the cutting tool's binder to soften, allowing the carbide grains to move.

Two linear fibers, possessing a diameter of approximately 60 nm, emanate from a central nickel nanoparticle with a grain size of circa 60 nm.
The fiber diameter is almost the same as the grain size of the nickel nanoparticle.
The two helical nanofibers are identical in coil diameter, coil length, fiber diameter, cycle number, coil pitch and cross section.