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Online since: February 2019
Authors: Kheira Bouzouina, Sadek Gouasmi, Djebbar Noureddine, Chelahi Chiker Yamina
Table 1 Mechanical properties of the dental structures [28-32].
This is due to low mechanical properties of this latter.
[6]A.Sharma, G.R.Rahul, S.T.Poduval, Shetty K.Assessment of various factors for feasibility of fixed Cantilever bridge: a review study.
"Mechanical loading of Brånemark implants affects interfacial bone modeling and remodelling".
A new method combining finite element analysis and digital image correlation to assess macroscopic mechanical properties of dentin.
This is due to low mechanical properties of this latter.
[6]A.Sharma, G.R.Rahul, S.T.Poduval, Shetty K.Assessment of various factors for feasibility of fixed Cantilever bridge: a review study.
"Mechanical loading of Brånemark implants affects interfacial bone modeling and remodelling".
A new method combining finite element analysis and digital image correlation to assess macroscopic mechanical properties of dentin.
Online since: August 2011
Authors: Sombel Diaham, Rabih Khazaka, Marie Laure Locatelli, Zarel Valdez-Nava, Mireille Bechara
The other important properties to be studied are the dielectric permittivity er, the loss factor tgd, and the breakdown electric field Ebr.
HT insulating materials and examples of parameters affecting sDC values Ambient air aging effect on sDC for a HT polyimide film Polyimides have been used for a long time in electronics, especially for semiconductor passivation or assembly insulating interlayer.
Aging under N2-atmosphere revealed no significant effect on the PI sDC, thus clearly identifying the role of O2 in the evolution of the material properties.
For HT applications, Si3N4 ceramic is preferred to AlN for its higher mechanical resistance under thermal cycling.
It also helps to identify the impact of the manufacturing process on the final properties, as already detected on sAC spectra.
HT insulating materials and examples of parameters affecting sDC values Ambient air aging effect on sDC for a HT polyimide film Polyimides have been used for a long time in electronics, especially for semiconductor passivation or assembly insulating interlayer.
Aging under N2-atmosphere revealed no significant effect on the PI sDC, thus clearly identifying the role of O2 in the evolution of the material properties.
For HT applications, Si3N4 ceramic is preferred to AlN for its higher mechanical resistance under thermal cycling.
It also helps to identify the impact of the manufacturing process on the final properties, as already detected on sAC spectra.
Online since: June 2015
Authors: Andanastuti Muchtar, Huda Abdullah, Savisha Mahalingam, Sahbudin Shaari, Izamarlina Asshari, Azimah Omar, Nurul Ain Md Nawi
The changes in the structural properties were analyzed by means of transmission electron microscopy (TEM) and atomic force microscopy (AFM) analysis.
The research focus mainly on the influence of annealing temperature ranging from 400 to 600 ºC on the surface morphology and structural properties of SnO2/MWCNTs and how does it affect the photovoltaic performance in DSSC.
An optimal temperature was proposed for SnO2/MWCNTs which produces best structural properties with a high conversion efficiency for DSSC.
Guo, Fabrication and luminance properties of field emission backlight unit based on SnO2 nanowires, Mater.
Sunkara, Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells, Energy & environmental Science 2 (2009) 1302-1309
The research focus mainly on the influence of annealing temperature ranging from 400 to 600 ºC on the surface morphology and structural properties of SnO2/MWCNTs and how does it affect the photovoltaic performance in DSSC.
An optimal temperature was proposed for SnO2/MWCNTs which produces best structural properties with a high conversion efficiency for DSSC.
Guo, Fabrication and luminance properties of field emission backlight unit based on SnO2 nanowires, Mater.
Sunkara, Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells, Energy & environmental Science 2 (2009) 1302-1309
Online since: August 2014
Authors: Shinya MORITA, Jiang Guo, Yutaka Yamagata, Shin Takeda, Junichi Kato, Masahiro Hino, Michihiro Furusaka
Introduction
Neutron beam has unique advantages such as deep penetration into materials, sensitive to light elements and capable of measuring magnetic properties, and has been used as a very powerful probe in material science.
The mechanical handling of glass mirror is not good because a special mechanical support is necessary and the alignment is difficult due to its brittle nature.
The electroless nickel has a good cutting property, and there is little wear happened on diamond tool.
The form accuracy of neutron mirror will be affected by accuracy of ultrahigh precision machine, profile accuracy of diamond tool, NC interpolation error as well as some environmental factors such as temperature and vibration, while surface roughness is mainly dominated by feed pitch and depth of cut.
The mechanical handling of glass mirror is not good because a special mechanical support is necessary and the alignment is difficult due to its brittle nature.
The electroless nickel has a good cutting property, and there is little wear happened on diamond tool.
The form accuracy of neutron mirror will be affected by accuracy of ultrahigh precision machine, profile accuracy of diamond tool, NC interpolation error as well as some environmental factors such as temperature and vibration, while surface roughness is mainly dominated by feed pitch and depth of cut.
Online since: July 2011
Authors: Jun Zhao, Wei Min Wang, Zhi Jie Lü
Therefore it’s imperative to improve their mechanical properties with different toughening and strengthening mechanisms [6, 7].
In this paper, mechanical properties and microstructure of Si3N4/TiC cutting tool materials were studied.
The mechanical properties were measured on prismatic bars with a nominal rectangular section of 4.0 mm× 3.0 mm× 40 mm.
According to Ref. [16, 17], Si3N4/TiC ceramic material may be oxidized to produce SiO2 and TiO2 under high temperature, meanwhile, the SiO2/TiO2 grains were molten for many factors.
Zhao: Mechanical properties and microstructure of Si3N4-TiC nanocomposites.
In this paper, mechanical properties and microstructure of Si3N4/TiC cutting tool materials were studied.
The mechanical properties were measured on prismatic bars with a nominal rectangular section of 4.0 mm× 3.0 mm× 40 mm.
According to Ref. [16, 17], Si3N4/TiC ceramic material may be oxidized to produce SiO2 and TiO2 under high temperature, meanwhile, the SiO2/TiO2 grains were molten for many factors.
Zhao: Mechanical properties and microstructure of Si3N4-TiC nanocomposites.
Online since: May 2022
Authors: Dragoş Buzdugan, Bogdan Radu, Cosmin Codrean, Georgiana Melcioiu
The main factors which determine formation of whiskers are soldering alloy characteristics, substrate alloys which is placed on the surface of the PCB boards and not the least the working environment.
These whiskers fibers have very good electric conductive properties, producing solder shorts of the electronic components [1].
The failures produced affects all industries (military, aerospace, medical, house appliance, energy, IT, automotive) [2, 3].
The main factors which influence the formation of whiskers are soldering alloy characteristics, alloy substrate which is deposited on the PCB board and not least the operation environment [5, 6].
„Factors governing tin whisker growth”- Auburn: A dissertation submitted to the Graduate Faculty of Auburn University Doctor of Philosophy, 2012 [10] H.
These whiskers fibers have very good electric conductive properties, producing solder shorts of the electronic components [1].
The failures produced affects all industries (military, aerospace, medical, house appliance, energy, IT, automotive) [2, 3].
The main factors which influence the formation of whiskers are soldering alloy characteristics, alloy substrate which is deposited on the PCB board and not least the operation environment [5, 6].
„Factors governing tin whisker growth”- Auburn: A dissertation submitted to the Graduate Faculty of Auburn University Doctor of Philosophy, 2012 [10] H.
Online since: December 2012
Authors: Gow Yi Tzou
From this study, it is noted that as the frictional factor, the angular velocity, the aspect ratio increase, the relative compression force decreases.
Tzou [12] used the SUPERFORM commercial software to explore the compression forming of double-layer bounded clad cylinder, the optimal experimental parameters to affect the uniform of double-layer bounded clad cylinder free surface of double-layer bounded clad cylinder can be obtained.
The elastic-plastic model is chosen and the material properties, such as Young’s modulus, Poisson’s ratio, density, are needed.
The upper die considers the frictional factor is 0.3; the lower die considers the frictional factor is 0.1.
Lee, Simulation optimization of FEM on the rotating compression of double-layer bounded clad cylinder with constant shear friction, The 25th National Conference on Mechanical Engineering The Chinese Society of Mechanical Engineers, (2008) November 21-22; Changhua, Taiwan
Tzou [12] used the SUPERFORM commercial software to explore the compression forming of double-layer bounded clad cylinder, the optimal experimental parameters to affect the uniform of double-layer bounded clad cylinder free surface of double-layer bounded clad cylinder can be obtained.
The elastic-plastic model is chosen and the material properties, such as Young’s modulus, Poisson’s ratio, density, are needed.
The upper die considers the frictional factor is 0.3; the lower die considers the frictional factor is 0.1.
Lee, Simulation optimization of FEM on the rotating compression of double-layer bounded clad cylinder with constant shear friction, The 25th National Conference on Mechanical Engineering The Chinese Society of Mechanical Engineers, (2008) November 21-22; Changhua, Taiwan
Online since: October 2015
Authors: Ji Hwan Kim, Jung Hwan Kim
The material properties can be obtained by the linear rule of mixture.
The arbitrary properties of the panel can be expressed as (3) where subscript M denotes arbitrary material.
In here, the effective material properties and the coefficients of temperature are given as s [5,6].
This represents that the reference temperature is the factor of material properties and affects to the critical pressure.
* Critical pressure deviation is proportional with respect to the neutral surface shift, and is the function of reference temperature for material properties.
The arbitrary properties of the panel can be expressed as (3) where subscript M denotes arbitrary material.
In here, the effective material properties and the coefficients of temperature are given as s [5,6].
This represents that the reference temperature is the factor of material properties and affects to the critical pressure.
* Critical pressure deviation is proportional with respect to the neutral surface shift, and is the function of reference temperature for material properties.
Online since: February 2019
Authors: N.A. Tolmacheva, V.V. Barakhtenko, A.E. Burdonov, N.E. Garashchenko, A.A. Garashchenko, Elena Zelinskaya
Among other properties, PVC, depending on K-value, has different molecular weight (which is reflected in resin grade), a different viscosity that makes it possible to customize formulations with various filler amount and, respectively, with different physical and mechanical properties.
Consequently, the particle size distribution will positively affect rheological properties, namely decrease composite viscosity [26].
With such differences in the cellular material structure, its physical and mechanical properties also change [31].
As the result of the research, a group of new materials with a wide range of positive physical, mechanical and consumer properties has been produced.
The definition of reinforcing action mechanisms of disperse fillers is one of the important parameters for direct improvement of MPC mechanical properties, in addition, the reinforcement is influenced by a great variety of factors.
Consequently, the particle size distribution will positively affect rheological properties, namely decrease composite viscosity [26].
With such differences in the cellular material structure, its physical and mechanical properties also change [31].
As the result of the research, a group of new materials with a wide range of positive physical, mechanical and consumer properties has been produced.
The definition of reinforcing action mechanisms of disperse fillers is one of the important parameters for direct improvement of MPC mechanical properties, in addition, the reinforcement is influenced by a great variety of factors.
Online since: February 2014
Authors: Walter Lindolfo Weingaertner, Lucas Benini, Lucas da Silva Maciel
Thus the grinding tools are often utilized at the limit of their physical properties and capabilities.
Although the superabrasive grinding wheels are more durable, because of their mechanical properties, and are able to be profiled, they are not as suitable for the current low size inventories, just-in-time minded industries, as the conventional grinding wheels, since they cannot be easily reprofiled.
It is important to emphatise, that the grinding process control is affected to a considerable degree by the grinding tool properties.
Unintended changes of the influencing factors lead to uncontrolled changes of the grinding wheel characteristics and to an altered grinding behavior.
Therefore, the maximum depth of contact before plastic deformation initiates is a function of the grinding wheel hardness and not of the mechanical properties of the chosen abrasive.
Although the superabrasive grinding wheels are more durable, because of their mechanical properties, and are able to be profiled, they are not as suitable for the current low size inventories, just-in-time minded industries, as the conventional grinding wheels, since they cannot be easily reprofiled.
It is important to emphatise, that the grinding process control is affected to a considerable degree by the grinding tool properties.
Unintended changes of the influencing factors lead to uncontrolled changes of the grinding wheel characteristics and to an altered grinding behavior.
Therefore, the maximum depth of contact before plastic deformation initiates is a function of the grinding wheel hardness and not of the mechanical properties of the chosen abrasive.