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Introduction TiC grain has the characteristics of high hardness, high melting point and good thermal stability.
The study on TiC grain reinforcing metallic matrix composite becomes a hot spot rencent years[1-2].
TiC grain was dissolved out as fine particles and dispersion in composite material.
It is obvious that there formed a large number of patched adhesive pits and loose bits come off soon in cutting off (as shown in Fig.7(a)) after the adhesive joint nipped on the softer Q235 steel surface.

Grains and variants are presented for two different ampplification powers.
The grain size of FeMnSi alloy is comparable to that of FeMn alloy and smaller than that of pure iron.
Grains between 20 and 200 µm2 are observed on the material microstructure with a high structural homogeneity.
Aknowledgement This work was supported by a grant of the Romanian National Authority for Scientific Research, CNCS – UEFISCDI, project number PN-II-RU-PD-2011-3-0186 REFERENCES [1] M.

It has been reported that, alloys with the same chemical composition can have different microstructures and mechanical properties due to variations in the casting process, the use of a grain refiner, modifier, and heat treatment.
Several experimental results have been reported describing the use of grain refiners or modifiers to obtain a fine-grained microstructure of eutectic Al–Si alloys [12].
Kennametal inserts with 35° rhomboid geometry, 0.2 mm nose radius, 5° relief angle, ISO catalog number VBGT110302F with a PVD TiN coating for better surface finish was mounted on the holder designated by SVJBL-1616H11 resulting in an overall 0° rake angle.

The coordination with the plastic deformation among the adjacent grains is poor as the strain rate increases and larger applied stress is required for the occurrence of plastic deformation, which causes the YS increasing.
It is easier to form the multiple slip system of dislocation due to the increasing number of the dislocation pile-ups near the grain boundary of the already slipping grains.

In conventional alloys, diffusion inhibition is often achieved by using small amounts of alloying elements to increase the number of lattice defects or by creating secondary phases that block atomic motion.
In high-entropy alloys, the large number of different elements results in high entropy, which can lead to slower diffusion due to the disorder of the atomic arrangement.
The properties of the alloy are determined by the grain morphology, grain size distribution, grain and phase boundaries of the constituent phases and microstructure.
The basic mechanism is that the addition of alloying elements such as Cr, Ni and Mo forms a protective passive layer on the surface of the grains which prevents corrosion of the underlying alloys.

Increase in thickness of film and in rotation number enhances centrifugal pressure.
Figure 4 shows fracture surface of Cu film fired under the rotation numbers of 0 and 10,000 min -1 at a temperature of 500 ℃.
Microstructure of Cu film fired under the rotation numbers of 0 and 10,000 min -1 at 500 ℃.
However, large pores are found in film fired under rotation number of 0 min -1.
For a Cu film with a thickness of 50 μm, centrifugal pressure with a rotation number of 10,000 min-1 is estimated to be 3 x 104 Pa.

-0.5 0 0.5 1 1.5 2 Weight Change (mg/cm2) 0 100 200 300 400 500 Number of One-Hour Cycles Ni50Al15Pt Ni20Al20Pt Ni20Al20Pt0.3Hf Ni50Al -0.5 0 0.5 1 1.5 2 Weight Change (mg/cm2) 0 100 200 300 400 500 Number of One-Hour Cycles Ni50Al15Pt Ni20Al20Pt Ni20Al20Pt0.3Hf Ni50Al Fig.1.
It has been shown that the so-called Pt-effect can be ascribed to a number of contributing factors.
The reduction in Al2O3-scale growth rate with Hf added at a sub-critical level can be ascribed to a "grain-blocking" effect.
Specifically, and as has been discussed by others [15], the growth of an alumina scale is predominated by grain-boundary diffusion.
Further, it is now well established that Hf cations tend to segregate to the grain boundaries of the alumina scale [16].

The results are presented in terms of stream function, temperature profile and Nusselt number.
Furthermore, anisotropy causes significant changes in the bottom as well as side average Nusselt numbers.
The medium is anisotropic in permeability, which may be the consequence of perrefretial orientation or symmetric geometry of the grain in the geothermal system [28-30].
In addition, the problem depends on parameters such as aspect ratio A, Prandtl number Pr and Rayleigh number Ra.
A rigorous numerical experiment is made, to study the effect of periodicity of the non uniform heating condition of the side wall on natural convection in the enclosure filled with a porous medium. section, Prandtl number (Pr), Rayleigh-Darcy number (RaDa), Darcy number (Da), aspect ratio (A) are fixed at 0.71, 50, 10-4, 1.5 respectively.

The lattice oxygen is very sensitive to the size of the crystal grain.
The objective was to achieve a uniform coating around the MWNT, while minimizing the number of free particles.
The anatase coating thickness and grain size observed by TEM shows some variation for the two nanocomposites.
Scherrer's formula was used to calculate an average grain size of 5.3 nm.
These ratios will correlate directly with the number of the -COOH groups.

The results shown that a large number of mullite phase was emerged in samples when the ratio of alumina to silica (A/S) was 2.55.
Table 1 The composition table of mullite samples (wt/%) serial number A 1 A 2 A 3 A 4 A 5 quartz sands commercial alumina 38.2 61.8 33.2 66.8 28.2 71.8 23.2 76.8 18.2 81.8 Among them, the A3 formula was the theoretical content of mullite formula.
The mullite crystal developed well and with columnar form and small grain size nearly 1 μm.