Search results

The geometry of CNTs and their arrangement on the substrate affect the screening effect and filed enhancement factor (β).
Introduction Multi-wall carbon Nanotubes (MW-CNTs) are promising for future electronic applications such as field emission devices, owing to their exceptional electronic properties and one dimensional structure.
Detailed reviews of the properties of CNTs as field emitters can be found in the literature [9].
To investigate the field properties of this configuration, arrays of nanotubes were studied with different inter-tubes distances.
Furthermore, the CNT emitter structure affects the geometric field enhancement factor β.

The barrier properties, mechanicals properties and microbial penetration were evaluated.
Mechanical Properties.
Table 1 shows the mechanical and barrier properties of the films.
The addition of hydrophobic phytotherapic caused a significant increase in all mechanical properties.
Optical and mechanical properties of thermoplastic polymers, In Robertson, G.L.

The state analysis and evaluation of the furnace pipe including of riser pipe, collecting gas pipe run over service period by EPMA, dye penetration inspection, macro and microstructure analysis, mechanical properties at room and high temperature and high temperature rupture property.
It is very important to understand the state of microstructure and properties of furnace pipes after the equipment has been running for on hundred thousand hours.
So, the microstructure, mechanical properties and life prediction and assessment of the main components of radiant section harp pipes run for 100,000hrs are done in this paper.
This shows that the various parts of the rising pipe do not exceed the normal operating temperature, the microstructure is good and in early or middle service time. 3.3Mechanical property and remaining life The mechanical properties of the rising pipe and collecting gas pipe at room and 980 °C for short time meet the technical standard[1,5].
Now there are some main analysis methods, for example, FEA simulation and calculation method, K factor inversion method, comprehensive analysis.

The design and dimensional characteristics of the spinneret affect not only the geometry of the hollow fiber, but also the transport properties of the hollow fiber membranes.
Understanding of the processes occurring during the formation of hollow fiber membranes requires considering the influence of a number of factors on which the structure and properties of the resulting membranes depend.
The structure of hollow fiber membranes obtained by the phase inversion method is mainly determined by thermodynamic and kinetic factors [4, 10].
There is also a relationship between the value of ideal selectivity and the maximum pore size of the membranes, which affects the separation properties of hollow fiber PSF membranes.
Conclusion Thus, the design and dimensional characteristics of the spinneret affect not only the geometry of the hollow fiber, but also the transport properties of the hollow fiber membranes.

EBSD results confirm that the texture intensity as well as the radial f-factors can be increased by modifications of pilgering tooling.
The (0001) Kearns f-factors are given in Table 1 for the two tubes examined.
It is clear from this table that f-factors increase after reduction and that there are differences between the two samples.
This could have a bearing on fatigue strength since texture orientation affects the elastic modulus.
References [1] W.F Spurr, W.E Quist, The effects of crystallographic texture on the mechanical and fracture properties of Ti-3Al-2.5V hydraulic tubing.

One of the key factors influencing the durability of the magnetic flux density on the surface of magnetic fabric is the content of magnetic fiber in magnetic fabric.
The magnetism of the fabric is the key factor for Magnetic fabric evaluation, the magnetism of the fabric is affected by times of washing during use.
The mechanical properties of magnetic fiber are greatly affected by the magnetic particles of spinning solution during spinning.
The content of the magnetic particles in magnetic fiber could not be high considering the mechanical properties of magnetic fabric, so the magnetic flux density on the surface of fabric is limited.
Study on properties of magnetic fiber materials[J].

Because of hard and brittle properties of ceramic materials, grinding and polishing the surface is the main processing methods, after grinded and polished, ceramics surface appear residual stresses and resulting in the cracks.
Introduction Engineering ceramic materials have been widely used in electronics, machinery, chemical industry, communications and other fields.Because of hard and brittle properties of ceramic materials, grinding and polishing the surface are their main processing methods, and after grinded, polished the surface , surface cracks are the main problems affecting the quality of the machined surface, and the residual stress is an important cause of crack.
So to establish the mathematical model of grinding surface residual stress of ceramics parts is the theoretical basis on study residual stress, and is also a difficult issue for researching, it has great significance in prediction and control the numerical and properties of residual stress, and in grasping comprehensively grinding surface properties.
Define: = (15) Thus, the incremental stress-strain relations in the plastic region is : (16) Grinding Temperature Model Ceramic materials in intense grinding, the metamorphic layer is confined to the surface than normal cutting, and high temperature grinding , so the grinding temperature is the main factor affecting the surface residual stress, namely: ～ (17) In strong grinding ,due to heat transfer time increases and the contact arc length grows, is proportional to the specific value unit width grinding ratio and contact length
Then the unit grinding width and resection rate of substitution, too Then put and the unit grinding width resection rate into (19), get: ∝ （20） It can get from (17)： ～ （21） Formula (25) reflects comprehensively and intuitively the relationships of various factors effect on , surface residual stress increases with the and , and with the , is related to the rational parameters ， ， ，， ，.

Metallurgical Mechanisms Controlling Mechanical Properties of Aluminum Alloy 2219 Produced By Electron Beam Freeform Fabrication Marcia S.
Understanding the metallurgical mechanisms controlling mechanical properties is essential to maximizing application of the EBF3 process.
In the current study, mechanical properties and resulting microstructures were examined for aluminum alloy 2219 fabricated over a range of EBF 3 process variables.
In order to maximize application of the EBF 3 process it is essential to understand the metallurgical mechanisms controlling mechanical properties in deposited material.
Tensile properties of as-deposited Figure 3.

Their mechanical properties, in vitro antibacterial, cytocompatibility and release properties of the composite cements were determined in this study.
The compressive mechanical property was tested with a Zwick/roell mechanical testing with a 10-kN load cell.
Mechanical strength and setting time are important factors for the clinical applications of bone cement materials.
The properties of porosity and degradation were related to the release of drug.
Velde, V.J .Stella, Factors affecting the deamidation of vancomycin in aqueous-solutions, Int.

We also did some study on the effects of annealing temperature on the mechanical properties and metallographs.
The alloy has excellent corrosion resistance and good mechanical properties, processing properties, which has been widely used as a material of corrosion-resistant equipments [1].
Mechanical properties of Monel alloy hot-rolling plates on different annealing temperatures are shown in Table 2.
From various factors, annealing temperature of Monel hot-rolling plates ranges from 650°C to 750°C.
Feng: Metal Physics III: Mechanical Properties of Metals (Science Press, China 1998)