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With this observation in consideration, if the ratio of C/Si was stoichiometric ratio, a large number of holes will appear in coating and deteriorate the capability of coating.
The SiC coating grown at a lower temperature results in finer grain size, compared with that grown at higher tempera- ture.

The polymer emulsion in the component used as adhesive could connect the cement hydration products’ grains.
It was even replaced by a large number of coalescent leaving unstable emulsion[3].

Polishing disc materials employed were straight grained cedar wood, carbon for electrode use, mild steel, quartz glass. 765 1 3 42 Fig. 3 Hydration polishing setup diagram 1:Vapour generator; 2:Sapphire substrate; 3:seal cover; 4:loading system; 5:Vacuum cup; 6:steam nozzle; 7: temperature control system; 8: polishing disk Results and Discussions As polishing rate of sapphire is related to steam temperature and polishing disc material.
From spectrum of H2O molecular, we can see that in the range of 3600-4000cm-1 in wave number sapphire combine with H2O molecular.

The grain size of this film is more than 1 µm.
Only a small number of relatively dense regions of the film surface can be observed under the pressure of 100 MPa.

A large number of dimples with a fairly wide variation in shape and size can be seen on the fracture surface of tempered specimens.
Karagiannis, N.Ridley, The effect of austenitising temperature on prior austenite grain size in a low-alloy steel, J.

By means of powder technology with shaping via cold isostatic pressing a homogeneous microstructure with a medium grain size of approximately 0.4 µm for Zirconia and approximately 0.8 µm for Alumina is generated for the dispersion ceramic (Fig.1).
A number of 15 heads for each of the three neck lengths 28 L, M and S were tested.

Consequently, we may assert that AR ceramics, having a modulus of rupture over 180 MPa (this value was statistically determined on a relatively large number of pieces) can ensure, as a rule, level 4 of ballistic protection.
The size of the directly bound grains, without any vitreous phase, is from 1 to 4 µm.

Typical defect structures are inclusions of grains with a different crystalline orientation surrounded by small cracks and planar defects in the layer (Fig. 1b).
Acknowledgements: Financial support by the Bundesministerium für Bildung und Forschung (BMBF) under contract number 03SF0393, Swedish Energy Agency and Ångpanneföreningen Research Foundation is gratefully acknowledged.

The average grain size of ZnO-TiO3 composite membranes increased with firing temperature increasing.
The mean particle size was determined by counting the number of particle size in a given area of the membrane.

In these engineering alloys, cracks are usually nucleated at multiple sites [1-5], namely, microstructural inhomogeneities, including metallurgical defects, grain boundaries, inclusions, second phase particles, porosities, and slip bands, when subjected to cyclic loading.
Because of the randomness of inherent microstructural inhomogeneities in an alloy, a large scatter exists in its stress vs. number of cycles to fatigue (S-N) curves.
In Al-Li alloy plates [6] and AA7075 T651 alloy plates [1,7], the fatigue properties were highly anisotropic, due to the pancake-shaped grain structure and strong texture in these plates, with the poorest being in the S direction and the best in the L direction, as the fatigue weak-links density was highest when loading along the S direction and was lowest along L direction.
Where N0 is the maximum possible number of cracks per mm2 generated in the surface area of 10×6 mm2 at the stress level close to the ultimate tensile strength (σs), i.e. maximum possible weak-links density (N0/(10×6 mm2)); k, constant; m, Weibull modulus; and σ0 is fatigue limit.
The pores including their number, size and distribution could be obtained by converting the pore 2-D statistics measured experimentally with optical microscopy into 3-D pore size distribution using an algorithm developed in this work in an A 713 cast Al alloy.