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Four-level orthogonal tests based on three improving factors such as water content and carboxymethyl cellulose (CMC) and stirring time(ST) were carried out to improve the method of preparing porous ceramic body foamed by aerogens at ordinary temperature.
In the process of drying the porous ceramic body, with the exclusion of water, water film that wrapped clay particles became thinner and thinner, the surface tension dragged particles closer and closer, which constitute main factor that affect the contraction rate of porous ceramic body.
SEM of the porous ceramic sample(formula:A3B3C1) a b Summary The work described in this study was supported by science and technology agency of JiangXi province to determine which is the key factor among plasticity adjustment (selected water content as key factor which was tested by the preliminary study[15]), stirring parameters(stirring time) and contraction control(CMC) that affect the preparation of porous ceramic body foamed by microbe.
Three factors for 4-level orthogonal experiment results showed that water content present the critical role, stirring time and CMC also effected slightly, preferred formulations should ranged in group A3B (3,1,4) C (4,2 , 1).
Macro-porous ceramics: processing and properties[J].

Introduction Polyamides (PAs) are an important class of widely used engineering polymers with a number of attractive mechanical and technological properties for joint parts design and manufacturing [1].
Moreover, the effect of thickness, glass fiber and carbon fiber content of PA6 on the optical properties which would determine the efficiency of the transmission joining has been shown by Bates and co-workers [10-12].
Consequently, the researches on laser transmission joining of PAs nowadays are mainly about the joining between similar materials and focused on two aspects: the effects of material properties on the efficiency of the joining, and the effects of material properties and the process parameters on the joint quality.
K is number of factors and ε is error.
It is evident that all the factors play a significant role in determining the joint width value.

By the modification of surface of the material the corrosion resistance and wear properties can be improved.
Solid electrolyte layer has been formed by ceramic coating and the properties have been studied [9].
The factors affecting the choice of coating process and composition are reviewed [12].
Mechanical and tribological properties of W/WCN bilayer coatings have been analyzed [15].
References [1] Ekrem Altuncu, Fatih Ustel, Correlation between sputtering conditions and growth properties of (TiAl)N/AlN multilayer coatings, Mat.

With the development of oil wells which contain corrosive medium, API standard connection can not meet the requirements of the oil industry, because of its sealing properties and joint strength [1].
This will affect the gauge's performance and shorten its service life seriously.
Otherwise, the depth of heat affected zone also increases, but not increases proportionally.
Grinding force is one of the most important factors in evaluating the performance of grinding process.
The surface layer of workpiece experiences severe plastic strain, the material expands under high grinding temperature and the microstructure changes, all of these factors result in high residual stress on ground surface.

The softening of tensile friction stresses is the main factor of cyclic creep.
Experimental materials and the experimental methods Ti-6Al-4V titanium alloy with (α+β) phase was selected in the experiment, which chemical composition and mechanical properties of materials are shown in Table 1 and Table 2.
Table 1:The chemical composition of theTi-6Al-4V alloy Al V Fe C N H O Ti-6Al-4V 5.5～6.8 3.4～4.5 ≤0.3 ≤0.1 ≤0.05 ≤0.015 ≤0.2 Table 2:The mechanical properties of theTi-6Al-4V alloy at room temperature δb(MPa) δ0.2(Mpa) δ(%) ψ(%) 895 825 10 39 Fig.1 The structure and dimensions of specimen (mm) Fig. 2 The hysteretic loop of Ti-6Al-4V first cycle of the cyclic stress-strain Effect of Strain on the Sow-cycle Fatigue Properties The Hysteretic Loop of Cyclic Stress-strain.
(a) δε/2=1.6% (b) δε/2=2.4% (c) δε/2=2.8% Fig. 5 The friction stress and the back stress under different strain Effect of Stress on the Low Cycle Fatigue Properties The peak and valley value of strain of Ti-6Al-4V alloy under different stress are shown in Fig.6.
The friction stress is the mainly factor to affect the cyclic creep deformation.

López1,2 1Ceit, Manuel Lardizabal 15, 20018 Donostia / San Sebastián, Spain 2Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia / San Sebastián, Spain abpereda@ceit.es, blgsesma@ceit.es, cblopez@ceit.es Keywords: High-Ti steels, Mechanical properties, Precipitation hardening, Microstructural characterization.
Introduction During the last years, many works have focused on the study of the mechanical properties of steels with high Ti levels, alone or in combination with other microalloying additions, since it has been reported that Yield Strength (YS) levels over 700 MPa can be attained while retaining a ferritic/bainitic matrix [[] Y.
However, it has been found that the mechanical properties of these steels are highly sensitive to variation in the processing route, leading to deviation in mechanical properties from coil to coil or along strip length and width.
Hardness measurements have been also performed to estimate their mechanical behavior and define the range of mechanical property stability.
However, it is worth noting that variation of the mechanical properties with coiling temperature is more marked for this steel.

However, due to the existence of some unfavourable factors, such as active chemical properties, easy oxidation and evaporation, no fixed shape and opacification of liquid metal at high temperature, it is very difficult to observe the melt stirring and changing process.
Numerical simulation of aluminium foam material mainly aimed at itself properties [1~3], such as the heat transfer performance and mechanical performance, without involving the stirring process.
The glycerol or polyethylene glycol (PEG2000) was added into the deionized water to change its properties such as viscosity or surface tension.
It is difficult to describe the solution properties and stirring effect quantitatively, so the video information is required to be processed further.
Since the factors d, g are constant, while the variation in difference value of is relatively small, the settling velocity is mainly affected by viscosity .

The mechanical stability of nanostructures depends on the surrounding medium.
The interface between the liquid and the surface is the decisive factor for the influence of the media.
The similar average collapse values from ethanol to 1-butanol (Figure 3a) indicate that the change in electric permittivity from 25 (ethanol) to 18 (butanol) does not affect the mechanical strength of the structures.
Thus, an adhesion failure of the polysilicon on the silicon oxy-nitride is unlikely as it would be expected to depend on the dielectric property of the media.
As the initial crack lowers the overall stability considerably by providing a stress concentration point, it directly affects the mechanical stability of the line structures.

This stage is very important in the process methodology and can affect the microstructure and properties of ceramics [5].
Surface roughness of the conductor was also played a critical role in the measurement of microwave properties; the smooth the surface, the skin effect can be reduced.
The shrinkage is the key factor in LTCC technology.
The presence of microcrack inside via became worse due to the density gradient at this area and due to imperfect processing factors.
The processing of ceramic material must be optimized with respect to microstructural characteristics, because only this way we can produced ceramic with properties that approach the level of intrinsic dielectric properties.

Moreover, most of ER fluid properties are changed under condition of temperature variation [4,5].
In the case of long-time use of ER device, the performance of ER device can be affected by the temperature of ER fluid which is caused by mechanical friction.
Four kinds of ER fluids are prepared with different optimized compositions and important properties of ER fluids are measured and compared.
These values are determined by not only static factors such as particle concentration but also dynamic factors such as operating temperature.
In this work, the properties of ER fluid operated under the shear mode are investigated.