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The ceramic (x=0.002) near room temperature exhibited excellent electrical properties (piezoelectric constant d33=172pC/N, planar electromechanical coupling factor kp=0.43, and dielectric constant =418).
A relatively high mechanical quality factor (Qm=200) was also obtained in this particular composition.
The electrical properties of all ceramics were measured after more than 1 day.
The planar electromechanical coupling factor kp and the mechanical quality factor Qm were determined by the resonance-antiresonance method according to IEEE standards using an impedance analyzer (HP 4194A).
This suggests that the grain size and morphology change with increasing BiFeO3 doping, which affects the piezoelectric property of the ceramics.

The aim of this work is to observe the distribution of varied magnetic fields and their effect on mechanical properties.
Microstructure and tribological properties are discussed with surface and cross-sectional morphology, X-ray diffraction patterns, and wear properties.
The mechanical properties of coatings are discussed for the effects on variance of magnetic fields.
Prediction and verification In order to confirm the significant control factors that affect the characteristics of chromium nitride films, an ANOVA is carried out such as CoF, wear rate, hardness and deposition rate.
In addition, the control factors influencing mechanical properties are analyzed by ANOVA.

After 40,000 cycles the fatigue test was stopped and the properties were measured on the tested specimens.
Cyclic loading causes damage and degradation to material properties in a cumulative manner [3,4].
The fatigue life and mechanical properties of composite materials depend on many factors including the matrix material, fiber material, volume fractions, fiber orientation, moisture content, porosity, applied stress, strain rate, and stress amplitude [5].
Mechanical Property Test The three-point bending tests were performed with the MTS-810 multi-purpose machine.
The degradation of physical and mechanical properties has been found to depend primarily on the total amount of moisture absorbed[11].

Heat load is the major factor to cause ablation and heat crack of piston head, and mechanical load is easy to bring crack at piston pin seat.
As regarded as the symmetrical entity, a 1/2 3-D solid model including piston and pin is established by using the software Pro/E, and some unimportant factors, such as spot fillet, bevel edge, oil hole and so on, are neglected in the model. 1/2 FEA model is introduced to the ANSYS10.0 software.
Considering the nonlinear material properties, the Newton-Raphson equilibrium iterative method is applied to calculate the nonlinear responses.
The temperature change will cause the thermal load and the deformation, but the deformation will be able to affect the quantity of heat transmission within the piston [5].
This fact makes clear that the explosive pressure of fuel gas is the main factor to cause the stress concentration.

It was shown that properties of these implants might be substantially improved with functionally graded materials (FGM).
Different examples are shown and influence of the sintering and gradient profile selection on final properties is discussed.
Existing solutions of materials combinations are not very satisfactory due resulting to wear debris causing complications and low level of mechanical properties in the case of ceramics.
In order to provide superior mechanical, good wear resistance and biological properties in vivo, the functionally graded materials concept can be introduced in to the hip joints design [4].
This was one of the factors of FGM design - to introduce an engineering compressive stress to alumina at the surface of balls and liners.

The research work indicates that the activating flux will be used in more welding process to obtain deep weld penetration, high productivity, low deformation and excellent joint mechanical properties. 0 Introduction Activating flux is to decrease surface tension of the interface and change interface properties and conditions of the system[1].
Activating flux has been applied in welding field to improve weld quality through the influence on droplet and the surface properties of molten pool.
Weld productivity has been improved obviously by A-TIG, meanwhile, there are little change in the properties of weld metal[2, 3].
Thus the combination properties could satisfy the correlation standard requirements.
The contraction degree of arc has depended on two factors: one has been the binding force between steam particles and electrons; the other has been the dissociation temperature of steam substance.

Optical Properties of Ta2O5/SiO2 Antireflection Coating System Shaoni Sun 1, a, Liyang Xie 1, b, Yichen Zhang 1, c, Ying Huang 1, d 1School of Mechanical Engineering & Automation, Northeastern University, Shenyang, Liaoning, China, 110004 ashnisun@me.neu.edu.cn, bliyangxie@mail.neu.edu.cn, czyc@china.com, dyinghuang@mail.neu.edu.cn Keywords: Ta2O5/SiO2 multi-layer, Antireflection coating, Optical properties, Technical study Abstract.
Substrate temperature is an important factor affecting the refractive index, so it has great significance to control substrate temperature for improving of film’s density and refractive index.
O2 content greatly affects the refractive index of film.
Substrate temperature has much important influence on film’s optical properties.
Preparation and Optical Properties of SiO2 AR coating, Optical Technique. 2(2000)104-106

With the method, the change law of the crack path direction and the crack propagation rate by the influence of the MDZ macroscopic mechanical property is researched.
Fig.4 shows the mechanical property of the MDZ will influence the deflection angleof the crack path.
Fig. 6 shows that the mechanical property of the MDZ also influences the rate of crack propagation.
Summary The mechanical property of the material discontinuous zone will influence the propagation behavior of the crack placed in closed to it in matrix: (1)The crack propagation path will deviate toward the material discontinuous zone when the crack grows in closed to it.
Kang: Journal of Mechanical Strength, Vol.33(3) (2011), p.450 [6] Tanaka K.

And under the optimum condition, the mechanical properties of SC-CO2 treated wood were not significantly affected.
In order to confirm the optimum penetration craft, this study designed the experiments as following table 1, and retention as well as penetration uniformity were used as the main evaluating factors.
Table 1 SC-CO2 Penetration experiment of IPBC for wood Serial number Pressure[MPa] Temperature [℃] Pressure Time[h] Time for releasing pressure[min] Weight Gain[kg·m-3] 1 10 44 1.5 30 4.547 2 13 41 4 20 3.988 3 16 56 1 10 3.628 4 19 35 2.5 20 5.496 5 22 53 2 10 3.403 6 25 38 0.5 10 2.944 7 28 47 3 20 4.863 8 31 50 3.5 30 4.433 Moreover, several main mechanical properties of wood after treatment of SC-CO2 under the same optimum craft, such as modulus of rupture, modulus of elasticity and compression strength, were also examined.
The results indicated that all the mechanical properties were slightly declined, however, without remarkable loss according to variance analysis.
Under the optimum condition, the mechanical properties of SC-CO2 treated wood were not significantly affected. 2) Compared with traditional penetration ways, preservative penetration by SC-CO2 was more effective with good preservative retention and uniform distribution of preservative. 3) SEM-EDX results showed that IPBC mainly penetrated into wood cell walls, resulting in lower preservative leachability.

In addition, the main factors to electrostatic sensor sensitivity were analyzed and discussed by ANSYS with an optimized probe size.
Furthermore, sensitivity distributions as well as its influencing factors for this sensor were obtained.
It demanded for a symmetrical sensitivity to avoid affecting from airflow distribution.
Simulation results and discussions From the sensor structure, factors of sensor sensitivity for the ring electrode contained insulating layer thickness H, dielectric constant of insulating layer ε, axial length L and ring diameter D.
Considering of material properties and sensor sensitivity as well as uniformity, electrode axial length was 10mm.