Search results

In the first step, the tungsten particles was broke and removed on the cutting tool surface, making tool surface to coarsen and forming a large number of defects that could increase the contact area between the reaction of gas source and substrate and the can of the substrate surface, improve the nucleation density of diamond on the cemented carbide substrate, and then enhance the adhesion of the diamond film in the substrate surface.
In the growth stage, increasing the reaction gas pressure and reducing the carbon source flow that would result hydrocarbon groups adsorbed to the substrate surface was etched by a large number of Hatoms, this in order to reduce the non-diamond carbon components [6,7].
Grain shape is basically the same, the crystal edges and grain boundaries are very clear.

Therefore as like "Test Methods of Soils for Highway Engineering" (JTG E40-2007) plastic soil classification showed if the phyllite whole body of fine-grained soil (particle size <0.5mm), which was the low liquid limit silt (ML).
The samples was divided into three groups in the light of each layer compaction number 30, 50, 98.It is used the laboratory test measured ​​CBR values to do dry density linear fitting, and get the selected phyllite on-site CBR value.
Table 1 Measured CBR results Each layer compaction number Dry density（g.cm-3) Test measured CBR (%) Compaction degree (%) On-site CBR (%) Design CBR (%) 30 2.14 5.68 93 0.53 ≥3 50 2.17 6.71 94 2.21 ≥4 98 2.21 8.16 96 4.96 ≥5 The table 1 showed that on-site CBR value was less than design CBR value, so the samples CBR value didn’t meet the requirement in " Specifications for Design of Highway Subgrade" (JTG D30-2004), and the selected phyllite needed to be improved with the cement.
While cement dosage and compaction times were unchanged, CBR value would increased as the coarse grain size content addition.

Considering that for all the studied points in the interval of 103.14÷103.18 seconds, a significant decrease in the fractality index is observed without its “restoring” to values of 0.5 or more, all of them were combined at number 10.
A change in the fractality index of the strain curves of the epoxy composite under tension, depending on the duration of loading Table 1 The coordinates of the "critical" points of the epoxy resin deformation curve under the tensile loads "Critical" point number Fractality index Point parameters absolute values relative values tcrit., s σcrit., MPa εcrit., % tcrit.tσstr., % σcrit.σstr., % εcrit.εstr., % 1 0,382 11,63 6,970 0,773 9.10 16.98 9.06 4 0,391 59,77 26,423 3,982 46.76 64.37 46.68 5 0,397 63,79 27,672 4,251 49.90 67.41 49.83 6 0,393 78,8 32,223 5,251 61.64 78.50 61.56 7 0,324 81,17 32,899 5,409 63.50 80.14 63.41 9 0,374 101,71 37,96 6,778 79.57 92.47 79.46 10 0,375 103,14 38,265 6,873 80.69 93.22 80.57 0,317 103,16 38,292 6,875 80.70 93.28 80.60 0,348 103,18 38,287 6,876 80.72 93.27 80.61 A more detailed analysis of the segments preceding the emergence of “critical” points on the graph of the change in the fractality index versus the loading duration showed that their emergence
Balbalin, Fractal analysis of the deformation curves of disperse and reinforced fine-grained concrete at compression.
Balbalin, Fractal analysis of deformation curves of disperse reinforced fine-grained concrete under compression.

Intorduction For a number of branches of mechanical engineering, in particular for the manufacture of armor, it is promising to use layered metal-ceramic materials, which are a three-layer package of steel-kermet-steel, which combines the positive properties of kermet and steel.
The cause of the detected effect may be the heterogeneity of the initial charge (non-uniform distribution of the component particles in the mixture, the quality and number of contacts between the titanium particles [8]).
The growth of titanium carbide grains is limited by the liquid metal and also prevents their fusion.
Fig. 2 XRD of shock-loaded samples at a flyer speed of 1000 m/s: 1 – Ti+2B+10%Ni МА, 2 – Ti+C+10%Ni МА In case of successful implementation of the synthesis, the product is titanium carbide or diboride grains distributed in a nickel bond.

Potato takes the second place after grains in Russia as for production and consumption.
The use of nanodrugs for example as micro fertilizers makes possible to increase plants resistance to unfavorable weather conditions and the yield of practically all food (potato, grains, vegetables, fruit) and industrial (cotton, flax) crops [6].
Potato Yield Structure # Variant Tubers Number per 1 Bush, [pcs] Relation to control, [%] Average Mass of 1 Tuber, [g] Relation to control, [%] 1.
Biodrug with HA 9.5±0.1 +26.6 108.3±0.7 +82.2 So when using the drugs with nanoparticles of ferrum, copper, copper oxide and humic acids the number of tubers per 1 bush has increased up to 44.0 % and the average mass of 1 tuber has considerably exceeded the control in all variants except cobalt oxide NP.

The main consequence of Zr is thought to be that it prevents Al cations from diffusing outward via segregation at aluminum oxide grain boundaries [5]. 
The diffusion process of the grain boundary produces a rapid oxidation rate.
Oxide grain development happens over time, reducing the number of simple diffusion pathways and slowing the rate of oxidation.
During the isothermal oxidation of uncoated IN600 at 1000 oC for 100 hours, a considerable number of voids were discovered at the scale / alloy contact and in the alloy.
Kim, Microstructural Evolution of Duplex Grain Structure and Interpretation of the Mechanism for NiO Scales Grown on Pure Ni – and Cr – Doped Substrate During High Temperature Oxidation, Materials Science and Engineering B76, (2000)pp. 173-183

Ciphers indicate the number of References.
With the temperature decrease to -60 0С the number of cleavage facets increases but the crack growth retards in the regions where the dimple structure with deformation ridges prevails (Fig. 8b).
But still, manganese can stipulate the formation of carbide segregations along the grain boundaries, thus decreasing the low-temperature plasticity and toughness.
This is stipulated by manganese specific influence since manganese in cast iron is able to form segregations along the grain boundaries.
The coincidence of cleavage facets and ferritic grains sizes (Fig. 14a and Fig. 14c) relates the intergranular fracture and the continuous net of the PE along the ferritic grain boundaries.

These are quite cumbersome and are overloaded with a large number of input parameters that prevent them from being adaptive enough to handle wide ranges of microalloy grades and strip dimensions and from being suitable for dynamic mill control.
By contrast, MDRX kinetics do not depend on the preceding strain and initial grain size (small p, b) and have a somewhat lower activation energy; concurrently, they are much more strain rate sensitive (high q) [8 - 12].
Under these conditions, dynamically nucleated grains grow due to MDRX, while in the regions that have not undergone DRX, static grain nucleation and growth take place [9].
The retardation of recrystallization at the Tnr is frequently attributed to the non-uniform distribution of the microalloying elements in the austenite, which leads to the complete arrest of recrystallization by the solute drag of grain boundaries or by their pinning due to the presence of precipitates.
In principle, the number of microstructural states can double after each pass until there is a maximum of 2 N-1 regions going into the last pass of an N-pass rolling sequence.

The Vickers-Hardness Number (VHN) is measured for spark plasma heat treated composites using a microhardness tester and the results indicate that 10wt%SiC composite has higher hardness compared to 20wt%SiC in both ZrB2-SiC and HfB2-SiC composites.
The SiC particles effectively suppressed the grain growth.
The Vickers-Hardness Number (VHN) is measured using a microhardness tester with 4.9 N force and Dwell time of 20 sec.
Vickers-Hardness Number (VHN) is measured using a microhardness tester with 4.9 N force and Dwell time of 20 sec.
The XRD peaks show that the dark spots mostly SiC with very little MB2 and the rest of the white area is MB2 rich with about 2- 6 wt% SiC varying from gran to grain.

Experiment Experimental materials: (1)cement: ordinary portland cement 42.5. （2）II District, the apparent density is 2.63, the clay content is 0.75%, fineness modulus is 2.67, good gradation.（3）Complex admixture：slag,fly ash,natural mineral.（4）Stone: 5mm～25mm gravel, crushed target of 4.8%, the grain shape is good, graded, in line with JGJ53-92 "concrete with crushed stone or gravel quality standards and inspection methods" requirements.（5）Polycarboxylic superplasticizer :density is1.13g/cm3.
Table 1 Concrete mixing ratio for chloride corrosion test Number Cement Admixture mineral Sand Stone Water Superplasticizer M0 450 0 743 1027 170 1.5 M3 405 135 743 1027 170 1.5 Coulometric test:Coulometric test had carried out according to ASTM1202[2].
Table 2 Coulomb through the concrete and Chloride penetration Coulomb Penetration grade Type ＞400 4000-2000 2000-1000 1000-100 ＜100 High Middle Low Very low Ignored Water Cement ratio:＞0.5 Water Cement ratio：0.4-0.5 Water Cement ratio：＜0.4 Latex modified concrete Ploymer concrete Table 3 Concrete mixing ratio for chloride penetration test Number Cement Admixture mineral Sand Stone Water Superplasticizer A 327 0 789 1046 181 3.3 A1 228.9 98.1 789 1046 181 3.3 B 421 0 738 1019 179 6.6 B1 294.7 126.3 738 1019 179 6.6 Fast constant voltage t steel corrosion test:The Concrete mixing ratio for fast constant voltage t steel corrosion test was listed in Table 2.
Table 4 Concrete test for chloride corrosion Number Compressive strength after 28ds’ standard curing (MPa) Compressive strength after 28ds’ immersing (MPa) Compressive strength after 56ds’ immersing (MPa) H2O 5%NaCl Loss（%） H2O 5% NaCl Loss（%） M0 64.0 68.8 65.6 4.65 74.9 63.5 15.22 M3 64.6 73.3 71.4 2.59 75.5 70.5 6.62 Coulometric test:The quantities of electricity through four concretes were listed in Table 4.
Table 4 Chloride ion diffusion in the concrete at 60V Number Quantity of electricity through theconcrete for 6h /C A 1879 A1 1244 B 1506 B1 1012 Fast constant voltage t steel corrosion test: The currents of C30 and C40 concretes with admixture mineral were lower than the benchmark concretes.