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. %) T0 * 64 36 0 0 T1 62.62 36.20 1.18 1 T3 59.94 36.54 3.53 3 T 5 57.25 36.87 5.88 5 T 9 51.87 37.55 10.58 9 T12 47.84 38.06 14.10 12 T15 43.81 38.56 17.63 15 *TX refers to the sample number, and X is the targeted weight per cent of Al2O3 phase Results and Discussion Fig.1 XRD patterns for TiAl/Al2O3 composites with different contents of TiO2.
The Al2O3 particles have an average grain size of less than 1 µm and disperse uniformly in the matrix.
However, the sample with 5.88 wt% TiO2 is very fine grain sized with uniformly dispersed Al2O3 in the matrix.
These results indicate that the introduction of small quantities of in situ formed Al2O3 can improve the mechanical properties due to the dispersion of fine grain sized ceramics particles.

Introduction Fe-Si layer has attracted attention in the field of engineering because such structure has a considerable number of practical applications and fundamentally interesting properties [1,2].
Experimental Details A hot rolled grain oriented low-silicon steel 3.46 wt%Si sheet of 20×20×2 mm3 was the substrate.
The small grain fromed during the initial stage of deposition tended to grow so that the grain boundary energy could be lowered.

This insect causes both quantitative and qualitative damage to the grain [1].Their control is primarily dependent upon repeated application of synthetic insecticides.
Although essential oils applied alone provide a good level of control of stored grain pests, they are very unstable because to their high volatility.
After 2 h, the numbers of insects present on treated (Nt) and control (Nc) areas of the discs were recorded.
Acknowledgements This study was supported by the “Eleventh Five Year Plan” grain bumper crop plan project (2006BAD02A17).

At the present moment the systems of alloying applied in the welding processes have a number of disadvantages due to the silicon and manganese reduction processes (1 – low-carbon electrode wire and high-silica flux with high content of silicon dioxide; 2 – low carbon wire and high-silica (acid) flux; 3 – medium manganiferous electrode wire and medium manganiferous acid flux). 1.
The base metal structure of all trials consists of ferrite grains and lamellar pearlite (4-5 μm).
In the zone of transition from the base metal to the deposit one fine-grained structure is observed (1-2 μm) which was formed in the process of welding due to recrystallizing when the metals were heated.
Fig. 2 – Alteration of total oxygen content in AN-348, AN-60 and AN-67 fluxes depending upon the introduction of carbon-fluorine containing additive Fig. 3 – Changing the concentration of general and fractional oxygen according to the amount of carbon-fluorine containing additive (percentage of the carbon-fluorine containing additive is shown in brackets) Fig. 4 – Changing of hydrogen content depending upon the amount of carbon-fluorine containing additive In the microstructure of the weld there are ferrite grains stretched in the direction of heat removal due to heating and accelerated cooling.

First remove a large number of primary sludge, and then doing the studies of grinding and flotation.
FC75-5-0/A-C/14~16 +10um -10um Underflow Overflow Sample Fig.1 Desliming flow chart Considering the grain size recovery and P2O5 recovery indicators, more appropriate conditions for the application of cyclone is FC75-5-0/AC/14~16, operating pressure of 0.20MPa; the main indicators of ore sample test results shown in table 3.
Table 3 The test results of cyclone desliming/% Items Oveflow Underflow Classification efficiency 10 um P2O5 grade density yield fineness -10um P2O5 grade density yield fineness -10um Content 20.63 4.34 35.72 79.93 26.64 33.08 64.28 11.70 67.94 Table 3 shows that the hydrocyclone can be removed about 80% or less grain and low-grade P2O5 products of 10μm, achieve a better results on desliming. 2.2 Experimental study of flotation after desliming The ore samples to study is formulated based on the proportion of grain size by the grit which is the above test of selected cyclone parameters and +0.15 mm coarse ore products, the test sample’s mainly chemical composition are shown in table 4.

The advent of novel surface modification techniques to produce a nanostructured surface layer at the top surface of a material by changing the coarse grains into nano-grains has opened new possibilities to achieve a high strength and a low wear.
A number of alternative surface modification techniques were proposed and invented to improve the wear behavior and to extend the fatigue life of bulk materials.
It has been reported in our previous study that the increase in hardness by UNSM technique is responsible for the grain size refinement [8].

In both cases this is indeed a fine-grained structure of tempered martensite.
Fig. 7 Overall view of damage Fig. 8 Cracks The present cracks were comparatively sharp and it is possible to express the opinion that they copy the original boundaries of austenite grains (Fig. 8), which may manifest their inter-granular character, which is very dangerous from the viewpoint of the strength properties of the material.
The reason is that the occurrence of inter-granularity leads to a reduction of cohesive strength of the grain boundaries and to subsequent degradation.
It also revealed a number of defective places in the material, which caused the subsequent failure of the exploited hoist engine bearing.

This can be done because E is related to the microstructure integrity, meaning the number, size and shape of cracks developed.
After quenching, samples were dried at 100 °C and then the TS severity effect on E was evaluated as well as its variation with the number of applied thermal cycles was determined for each ΔT.
Zircon grains (light grey) are rounded and are generally larger than the mean diameter of the raw materials that was around 2 μm.
In the Z15 samples, big (≤50 μm) MZ grains can be observed, in Fig. 2 D the detail of the electrofused MZ microstructure is evidenced, round Zirconia grains (≈1-2 μm) are homogeneously distributed in a Mullite matrix.
Fig. 4: TFR; Evolution of E/E0 ratio with the number of thermal cycles at ΔT =1000 °C .

(1) Where NA was the number of particles per unit area of specimen, λ was distance of particles, the number of particles in area of 150μmX150μm was calculated at three different view areas, and the average particle distance λ was got.
Figure 3 The microstructure of the 13MnNiMoNbR steel after normalizing at 920 ˚C The microstructure of the 13MnNiMoNbR steel after normalizing at 920 ˚C was shown in Figure 3, a large number of hollow island shape structure existed, the average width was 2.7μm.Pearlite did not appear from CCT cooling curve of 13MnNiMoNbR steel[3]when cooling time of austenite from 821˚C to 400˚C which was between 15 seconds to 2.8 hours, the cooling curve all fell into the bainite area.
Figure 4 Microstructure of13MnNiMoNbR steel after 980 ˚C (1h) simulated hot pressure + normalizing 920 ˚C (1h) + tempering 620 ˚C (2h) The microstructure of 13MnNiMoNbR steel after 980 ˚C (1h) simulated hot pressure + normalizing 920 ˚C (1h) + tempering 620 ˚C (2h) was shown in Figure 4, the average grain size was 7.9, comparing with the microstructure after normalizing, granular bainite was completely decomposed during the 640˚C tempering, there had been massive of ferrite as well as some non-uniform distribution of carbides, the average width of carbides was 1.8μm, the average distance of the carbide, λ was 8.0 μm.
Figure 5 The upper bainite find in weld after 980˚C(1h) simulated hot pressure + 920˚C(1h)+ 600˚C tempering The grain size of the microstructure of SAW weld for H10Mn2NiMoA,SJ102 after 980˚C(1h) simulated hot pressure + 920˚C(1h)+ different tempering temperature was fluctuate from 7.9 to 8.2.A large amount of the upper bainite was found as showed in figure 5.
As the grain size from 7.9 to 8.2, the dispersion strengthen played a important role.

The feldspar minerals become kaolinite because of the weathering role, but quartz grains was reserved.
It is showed that by the test of polarized light microscopy and scanning electron microscopy[4]: the microscopic structure of Jinan area diorite residual soil both in single-grain structure and stacked poly structure.
And the coarse particles mainly are quartz, feldspar, mica, chlorite debris and these mineral constitute a single grain structure.
As for the fine-grained mineral, many of them are while kaolinite, their morphologies are thin slices stacked each other and constitute a "worm-like" shape.
The standard penetration number N63.5 value is the most basic date for the evaluation of the residual soil.