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At high temperatures, the densification that occurs at the grain boundaries of the particles, led to the formation of a stronger compact structure.
Hardness Distribution 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 Sintering Temperature(ºC) Vickers Hardness Number(HV) Figure 3.

By further detecting of the microstructure , we found that tissue of the high temperature superheater header was abnormal (Fig.3):a large number white ferritic structure in the microstructure massive, which is the main reason for the low hardness, and can reduce the abnormal organization of comprehensive performance indicators.
Because of high composition of stable ferrite Cr, Mo alloy element content in P91 steel, it occurs only in moderate high-temperature response when high temperature tempering, so martensite lath broken sub-grain structure and dislocation network are formatted。

Most materials used in tribological systems are polycrystalline and consequently surfaces of tribological contacts consist of a number of orientations (crystallographic planes).
In polycrystalline materials, the problem becomes more complex since grain boundaries will influence the surface energy and hence the adhesion force.

It is a more perfect material which preserves its mechanical and chemical properties for a long time and can accept a large number of radioactive elements contained in radioactive wastes into the lattice.
The grain size ranges from 15 to 25µm.

Carlin Trend gold ores were mainly distributed in the Nevada, Utah of United States and DianQianGui, chuan ShanGan of China,and in the southeast Asia and South America Peru also have distribution.Carlin Trend gold ores are often refractory to conventional cyanidation, for a number reasons:1) the gold is locked up within host sulfide minerals such as pyrite or arsenopyrite; 2) the ore contains carbonaceous compounds which are preg-robbing; 3) the gold is locked up in silicate minerals.
analysis Table 1 Ore single mineral chemical analysis Gold content Sulfide The calcite, dolomite Quartz, Mica Shale Au(10-6) 15.8 0.07 0.26 2.96 Table 2 The mineral elements more analysis results elements Au( g/t) SiO2 S As Fe content（%） 1.5 47.96 0.41 0.49 6.78 elements CaO MgO Al2O3 TiO2 CO2 content（%） 9.23 2.64 10.19 2.26 2.79 3 Mineral composition of the ore Ore by a microscope. atificial placer analysis, X-ray diffraction analysis, scanning electron microscopy (sem) electronic probe component analysis, Ore have carbonate, oxide, sulfide, Portland, elemental elements, There were 15 kinds of minerals, Among them main accounted for 60% of the ore carbonate, Sulfide, oxide and secondary Portland, ore accounted for 0.3%, 17% and 21%, other content is few. 4 The occurrence state of gold By chemical analysis, a microscope, artificial placer analysis, single mineral chemical analysis and scanning electron microscopy (sem) electronic probe component analysis, The gold ore main think fine grain

Even so, the dominating microstructure of either deposit was dendritic and consisted of columnar grains that span the entire length of the re-build (Figs. 1g-h).
Specifically, the relative density increased from 98.5% to 99.3% with increasing energy between 18 and 24 J·mm-1 and from about 98.1% to 99.3% with increasing number of re-melts from one to three (Fig. 2a).
These processing parameters were observed to also influence the average pore size; the pore diameter decreased from roughly 24 to 21 µm with increasing beam energy and from 23 to 19 µm with increasing number of re-melts (Fig. 2b).
Nonetheless, despite the decrease in the growth rate of the BNi-2 deposit with increasing number of re-melts, the beneficial effect of an increase in the relative density (from 98.1% to 99.3%) and a decrease in the pore size (by 5 µm) with increasing number of re-melts from one to three (Fig. 2a) may be required for high-end applications.
Deposits produced by EBFF on 321 SS. 97.5 98 98.5 99 99.5 Number of Beam Passes Relative Density, % 97.5 98 98.5 99 99.5 15 20 25 30 Beam Energy J·mm-1 1 2 3 (a) 20 J·mm -1 2 re-melts 17 19 21 23 25 Number of Beam Passes Pore Size, µµµµm 17 19 21 23 25 15 20 25 30 Beam Energy J·mm-1 1 2 3 (b) 2 re-melts 20 J·mm -1 Figure 2.

The experimental results indicate that the average grain size of RE0.5Sr0.5CoO3-δ thin films ranges from 86 to 165 nm，and the film obtained by heat-treating at 750 °C is highly oriented <110>.
Because the amount and distribution of oxygen vacancy at interface region has a decisive influence on the electrical properties and stability of the SOFC, a number of studies have been focusing on the oxygen vacancy ordering and electrical transport property of La0.5Sr0.5CoO3-δ [7-10], There have few studies on the amount and distribution of oxygen vacancy at an interface region for RE0.5Sr0.5CoO3-δ (RE=La, Pr, Nd) thin films.
This plays an important role in enhancing the oxygen ionic transference number and ionic conductivity and in improving the performance of SOFC electrode.

A large number of experiments are usually required to build up a complete CCT diagram.
It is well known that the addition of Ce in bearing-B steels is a usual practice for preventing B segregation on the grain boundary and increasing solute B content.

The bulk density decreases with an increase number of air pores in the structure.
The particles have to be flake-shaped and must not contain any lumps or spherical grains.

Cu tends to segregate at grain boundary and improves the plasticity of high entropy alloy [6-9].
The oxide of Ti,Ni accreting on Al2O3 form needlelike and large numbers of needlelike oxides accumulate.