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Besides, calcium sulfate whisker also gets excellent mechanical properties and good compatibilities, which makes it have wide application in plastic, rubber, flame retardant materials, antistatic materials, flame retardant paper and construction materials, etc [2,3].
There are three factors which would affect the experimental results such as the dosage of crystal growth auxiliaries (mole ratio of Mg/Ca), reaction temperature, concentration of sulfuric acid and the precipitating time.
Took three levels for each factor, and the orthogonal table L9 (34) was chosen to carry out the orthogonal experiments, the related factors and levels were given in Table 2.
It is supposed that the mole ratio of Mg/Ca can affect the results obviously.
Experimental results show that the mole ratio of Mg/Ca is the key factor that affect calcium recovery and length-diameter ratio of whisker.

It has been seen that these factors play various roles in lift generation.
The forward motion and the lift are two factors that keep the UAVs airborne.
When the wing is introduced to the airstream these both factors add up and launch a sustaining life force.
Table 3: Mechanical properties of glass fibre Fibre (glass) Density (g/cm3) Tensile strength (Gpa) Young’s Modulus (Gpa) R 2.54 4.135 85.5 C 2.52 3.331 68.8 D 2.14 2.415 51.7 A 2.44 3.31 68.9 S2 2.46 4.89 86.9 E 2.6 3.5 72 Figure 2: Tensile strength vs Young’s modulus of glass fibers Figure 3: Density vs Tensile strength of glass fibers 5.
By narrowing down all the parameters we came to conclude that there are various factors affecting the performance of an ornithopter to achieve stable and controlled flapping wings.

There exist many factors affecting the hardness and optical properties of the coatings.
Authors of ref. [8] established a correlation between the Raman data and the structural properties of the films.
However, this correlation may appear incomplete because the film growth process is generally affected by many factors related to the substrate properties, and this influence may have an impact on the coating structure.
Different structural factors can be responsible for hard coatings.
Zhang, Structure, mechanical, and frictional properties of hydrogenated fullerene-like amorphous carbon film prepared by direct current plasma enhanced chemical vapor deposition, J.

The material of impeller is Q235, its mechanical property parameters [9] were shown in Table 1.
The mechanical properties of impeller physical quantity unit value density kg/m3 7850 elastic modulus Pa 2.06×1011 Poisson ratio 0.28 fatigue limit MPa 180 yield limit MPa 235 Assume the structure of the impeller free vibrates and ignore the influence of damping when modally analyze.
Vibration Characteristics Analysis Impeller vibration can affect the flow field in two aspects, firstly, the structural vibration affects the fluid boundary, and secondly, the elastic wave or sound wave that is inspired by the structural vibration affects the flow field.
The sixth-order frequency margin is the least, so its amplitude amplification factor is the largest.
Xi, Chinese Journal of Mechanical Engineering.

Characterizing anisotropic dielectric properties is crucial.
The external magnetic field can influence Magnetic NPs' magnetic properties.
This means that the substance can move more freely within the rock, potentially affecting its transport properties.
The ferromagnetic nanoparticles in the nanofluid can also affect the magnetic properties of the sandstone.
The results of the study demonstrate that the hybrid nanofluid composed of BaTiO3/MnO exhibits the highest recovery factors.

The optical, chemical and mechanical properties have been investigated using UV-Vis spectroscopy, FTIR and Micro-indentation tester, respectively.
Various studies of the effect of ionizing radiation on the properties of polymers has shown that there is an improvement in the properties of polymers such as electrical, optical and mechanical properties as well as the properties of the polymer surface [1-5].
It was found that the main factors causing the modification of these properties is the creation of unsaturated bonds, the chain scission, cross-linking, and the formation of volatile fragments and clusters of carbon atoms [6–14].
As a result, the physical properties of the polymer material may be changed such as optical, electrical, mechanical and compositional properties [19 - 21].
The main purpose of this paper is to study the damage, optical chemical and mechanical properties of the bombarded low density polyethylene to deepness of knowledge about the influence of ion beam bombardment on the properties of LDPE.

In recent years, laser cladding ceramic coatings have attracted wide interests because of their better properties.
Most researchers have focused on the microstructure and properties of the laser-clad ceramic coatings [1-4].
The dilution rate is an important factor in the performance of laser cladding [5-6].
If the dilution rate is large, a large amount of substrate material will be mixed into the ceramic coating, thus affecting the coating properties.
It is necessary to control dilution ration based on the select a comprehensive multi-factor process parameters.

Introduction In recent years, tungsten carbide (WC) and its composites (WC-Co) are used widely in the manufacturing industry due to its unique mechanical properties [1].
However, these properties also contribute to the difficulty in machining, restraining the selections of machining methods for that material.
Table 1: Machining parameters Deionized water resistivity [MΩ cm] 0.5 Voltage [V] 60 Resistor [Ω] 156 Capacitor [pF] 265 Frequency [kHz] 100, 300, 500 Duty cycle [%] 0, 50 Tool rotation [rpm] 500 Feedrate [µm/s] 0.2, 5.0 In micro-EDM, a material with low tool wear ratio is usually preferred as too much electrode wear can affect the machining accuracy significantly.
This shows that feedrate is one of the key factors that affect the extent of electrolytic dissolution, hence it has a significant effect on the machining accuracy and also the surface finishing of the holes in micro-EDM with deionized water.
Duty cycle and feedrate have been identified to be the main factors affecting the machining gap and machining quality of holes.

Comparing the welding tool with a cylindrical pin with the welding tool with a flat faced-pin (square profile) resulted in [21]: the maximum temperature is attained for the pin with square profile with positive effect over the stir’s plasticity; both the deformation and the plastically deformed surface are bigger by using the pin with square profile; by using the square profile-pin better mechanical properties are obtained.
The extents of the two regions as well as the grain-size spatial distribution within each are affected by the selection of the FSW process parameters (tool rotational and welding velocity, tool geometry, tool plunge depth, etc.) and the grain-size distribution within the weld greatly affects the mechanical properties of the weld.
The main areas resulted after welding are presented in Fig. 8: zone A – the base material; zone B – the heat affected zone (HAZ); zone C – the thermo-mechanically affected zone (TMAZ); zone D – the area of the weld seam.
Accurate and reliable numerical analysis of the FSW is still a very difficult task as the behavior of the FSW joints is influenced by different combined factors.
Safaee, Characterization of the Influence of Tool Pin Profile on Microstructural and Mechanical Properties of Friction Stir Welding, The Minerals, Metals & Materials Society and ASM International, 2014.

Si-based nitrogen ceramics, in particular, are predominant candidates for frictional materials because of their excellent mechanical and thermal properties compared with other ceramics.
Crystalline phase, morphology and distribution of grains as well as the amount and distribution of grain boundary phase are supposed to be dominant microstructural factors affecting the tribological properties of Si-based nitrogen ceramics.
In this study, �/� composite sialons with various �/� ratios were fabricated by hot pressing powder mixtures of Si3N4, AlN, Al2O3 and Y2O3, and the relationship between microstructure, mechanical properties and tribological properties of these composite sialons was investigated.
Table II summarizes mechanical properties of the specimens.
The improved mechanical properties in the composites with high �-Si3N4 content should be ascribed to the existence of elongated grains that act as reinforcement.