Search results

Introduction Sialon ceramic could be obtained by a number of routes, including sintering of carbothermally derived powders or direct solid-state reaction of nitrides and oxides in nitrogen atmosphere.
Zirconia particles consisted of the numerous numbers of tiny nanocrystallites, some extremely fragmented particles showed amorphous structure and were not identified by the electron diffraction pattern.
It is concluded that significant destruction of crystalline lattice took place, with the formation of the new grain boundaries and/or dislocations, however, various susceptibilities of the mixture component to deformation were found.

Slope soil employed the fine sand, which the solid grain density is 2.70 g/cm3, the minimal dry density is 1.14g/cm3, and the maximal dry density is 1.65 g/cm3.
The section profile of the built three-dimensional finite element mesh is shown in Fig.6, in which the element employs the 8-node hexahedron and the number of element and node are 1,396 and 1,268 respectively.
Fig.7 Horizontal Displacement Distribution of Slope at 9.0s (Unit: m) The dynamic finite element calculation not only verifies the results of the macroscopic deformation of the measure points in the dynamic centrifuge modeling test, but also effectively overcomes the shortcomings of the limited number of testing points, gives the distribution of the slope displacement.

During the course of industrial production, a large number of polluted industrial waste gas with heavy metal are discharged into the air, a large number of polluted industrial waste residue and waste water with heavy metal are discharged into the air to be discharged into the river, therefore, the soil around the city polluted by heavy metal pollution becomes more and more serious [3].
Treatment Technology of Polluted Soil with Heavy Metal Heavy metals in polluted soil not only directly results in the drop in grain production, but also eventually endanger human health through the food chain with the help of water, air, plants and other medium.

Experimental result Fig.3 shows a S-N diagram of stress amplitude and number of cycle to failure.
Fig.4 Fatigue fracture schematic diagram The 5083 aluminum alloy with dispersion strengthening heat treatment process has good mechanical performance and small grain diameter.
Fatigue and fracture crack growth of aluminum alloys at very high numbers of cycles.

We can admit that the resulting transfer reaction is achieved in two intermediate stages, one of dissociation and adsorption and the other of steel dissolving [2]: {N2}↔2Nad (1) 2Nad↔2[N] (2) {N2}↔2[N]; (3) In evacuation and casting, the steel oxidizes at its surface – the content of [O] increases – so the number of free spaces n is lowered and thus the absorption of nitrogen is slowed down, yet the content of [N] increases.
The negative influence of nitrogen in steel is manifested in the following reasons: reduces the plasticity and toughness of the steel, in combination with hydrogen contributes to the emergence of air holes in cast steel, it causes steel aging through deposition of nitrides at the boundaries of the structural grains [2].
Conclusions The investigations carried out on the nitrogen removal efficiency in the steel bath and their analysis lead to a number of conclusions, namely: 1) By the same MATLAB program processing data on the bubbling (Db, Tb, Pb) that were processed in Excel, graphical presentation of twin correlations resulting from triple correlation, it has a maximum point and allows choosing subdomains for the processing parameters to obtain values ​​for nitrogen removal efficiency as close to the maximum value, the correlation coefficient R=0.8952 and the deviation from the regression surface: S=3.7127% confirm the validity of this correlation; the effect of the combined influence of bubbling parameters on nitrogen removal efficiency lead to higher values ​​for this parameter (ηN=37.6433% - triple correlation, ηN=38.4517% - double correlation for T=Tmed, ηN=38.2685% - double correlation for P=Pmed, ηN=39.3412% - double correlation D=Dmed) compared with those obtained from simple correlations. 2

The grain outline of MHSS was clear, and the matrix structure was some martensite lath beams.
The number and size of pitting pits increased with the increase of Cl- concentration, which indicated that the pitting corrosion resistance of the MHSS decreased with the increase of ion concentration.
The size of the pitting pit was randomly, therefore, it was mainly based on the number of pitting pits to judge the pitting corrosion resistance of alloys under different Cl- concentrations.

For the former method, Voronoi tessellation method, cellular automata grain growth algorithm, sphere growth algorithm, and image analysis methods could be applied to create a representative structure in a digital material representation sense as indicated by Yang et al. [7, 8].
As octadecahedral foams can be accounted as a number of repeated RVEs in the structure, this RVE is considered to represent aluminium foams with uniform and closed octadecahedron cells.
Parts 1 and 2 in the FE model were meshed using the Belytschko-Tsay shell elements, with setting a shear factor of 5/6, and the number of through shell thickness integration points to 1.

There is no cementation in marl grain.
When the inclined lower yard construction enter the place 2m far from coal conveying channel , it caused roof collapse in the left side of working face with a large number of mud gushing, leading it unable to continue construction.
Grouting holes arrange around the tunnel face, the number 12.An inspection hole is arranged in the middle of the work surface.

Regression prediction model about the relationship between summer rainfall and grain production was established in [7].
We use the mutation method as follows to avoid infeasible solutions: given mutation probability , bit by bit operate individual as follows: , (5) is a random number in [-1,1], is a random number with normal distribution .

The fine aggregate used was a mixture of tiny grains of rock and granular materials, mainly defined by size, more refined than gravel and coarser than silt.
The vertical axis shows the compressive strength in MPa, while the horizontal axis represents the sample numbers.
Acknowledgements The author would like to acknowledge the support from the Fundamental Research Grant Scheme (FRGS) under a grant number FRGS/1/2019/TK06/UNIMAP/02/6 from the Ministry of Higher Education Malaysia.