Search results

The tool wear mechanism has not yet been clarified, but it might involve compound effects of a few complicated factors, such as chemical, physical, electrical, and mechanical interactions between silicon and diamond.
This difference might be caused by the singularity in mechanical properties of nature diamond such as crystallographic orientation error.
Though the friction coefficients of coolants A and C were over 0.3, and those of coolants B and D were about 0.15, the difference in friction coefficient did not affect the transfer of heat.
Rapid tool wear in silicon machining is not only a result of mechanical interaction.
Instead, the water molecules in moisture which account for more than 80% of the water-soluble or the emulsion coolant might be the Fig.7 Model of microplasma occurrence and tool wear in silicon machining Typical wear edge shape Elastic recovery New cutting edge Flank wear Undeformed chip thickness Flat region / Crater Rake angle Crater angle Removed chip Microplasmas dominant factor for preventing from microplasma generation.

Additionally, comparing different publications where the same material combination is used, it can be concluded that the properties of the Schottky contact can be quite different [3].
He concluded that there is a strong dependence on the interfacial properties such as the atomic structure and the presence of electrically active interface states.
Basic properties of sputter deposited MoN thin films are presented in a previous work [11] and their application as a Schottky contact material for 4H-SiC diodes as well is information on the diode fabrication is shown in [12].
References [1] Levinshtein, M.E., et al., Properties of Advanced Semiconductor Materials: GaN, AIN, InN, BN, SiC, SiGe, Wiley, New York, 2001
[4] Stöber, L., et al., Impact of contact material deposition technique on the properties of Ti/4H-SiC Schottky structures, in Materials Science Forum. 2016. p. 569-572

The stiffness problem of structure doesn’t decide the bearing capacity of structure directly like strength and stability, but poor stiffness can affect usability of structure and deteriorate its working conditions, then affect the bearing capacity of structure indirectly.
The stiffness problem is especial and has less impact on the safety of the lives and property, so its reliability index could be reduced advisably
(6) Fatigue is related to probability, which is effected by many complex factors.
[8] Liu, B., Zhang, Q., and Xing, J.X., in: Mechanical engineering and automation, (2011).

Introduction Magnesium alloys sheets or strips have been widely used in computer, communication, and consumer electronics (3C) products, especially in notebooks and flash drives, for lightweight and other excellent properties [1], such as electro-magnetic shielding and recycling, etc.
Extrusion of magnesium alloys is more difficult than that of aluminum alloys, because the surface quality and the mechanical properties of the product are more sensitive to the extrusion conditions of the initial billet temperature and the ram speed.
Murai, et al. [4] investigated experimentally the effects of billet homogenization, extrusion ratio, and ram speed on microstructure and mechanical properties of AZ31B magnesium alloy after rod extrusion processes.
Chen et al. [5] discussed experimentally the effects of extrusion ratio on the microstructure and mechanical properties of AZ31 magnesium alloy.
The interfaces between the billet and the die and container have a constant friction factor m, which is set to be 0.7 to correspond to hot forming conditions.

On the other hand, the crystal structure and the lattice parameter, mechanical and physical properties of the alloys, stability of solid solutions in relation to phase transformations, mobility of dislocations, plasticity or brittleness are determined by the sign, value and symmetry of interatomic bonds.
The experimental data concerning the role of carbon, nitrogen and carbon+nitrogen were explained earlier within the frame of ab initio theoretical calculations of electron properties for austenitic steels containing manganese, chromium and doped by carbon, nitrogen or carbon+nitrogen [1,2].
Interstitial atoms strongly affect the redistribution of electron density in their nearest neighborhood.
The interstitial atoms affect the value of Me-Me bonds in the nearest neighborhood of interstitials.
Luitz: WIE�2k, An Augmented Plane Wave+Local Orbitals Program for Calculating Crystal Properties (Karlheinz Schwarz, Techn.

Table 2 lists mechanical properties of the cellular composite.
Fig.2: Tensile tests on DOCOL 800 DP (cut view at 5.3 % strain) Table 2: Material properties of the cellular composite (t ≙ tension, c ≙ compression) [2] ρ [g/cm3] E [MPa] ν [-] Rp0,1%,t [MPa] Rp0,1%,c [MPa] Rm,t [MPa] Rm,c [MPa] 0.72 3098 0.31 5.8 9.1 17.1 18.3 Numerical and Experimental Procedure Numerical Procedure.
The overestimation of the ultimate load by the FEM simulations is mainly affected by the manufacturing deviations or imperfections, which are not considered in the FEM model.
Simulations show that varying the material properties of the adhesive and/or of the core by the factor of two as well as modeling each spot weld (Fig. 4) in detail have negligible effects on the simulation results and are therefore not supposed to cause the deviation between experiments and simulations.
Huber, Cellular Composites - Mechanical Properties and Applications in Sandwich Structures, in: M.

Modeling the Material Removal Rate in Micro Abrasive Water Jet Machining of Glasses Jingming Fan1,a, Changming Fan1,b and Jun Wang2,c 1 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China 2 School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia a jmfan@gdut.edu.cn, bfanchm@gdut.edu.cn, c jun.wang@unsw.edu.au Keywords: Micro abrasive water jet, Material removal rate, Micro channel, Cutting performance model.
The material removed by a single particle impact can be estimated in terms of the particle and impacting parameters (dp, ρp, v, α) as well as the target material properties (Kc, H/E) [9].
After analysis the effects of various major variables, the jet attack angle depends on the profile of the cutting front which in turn depends on jet traverse speed u, water pressure P, standoff distance S, material properties(H/E and Kc), and particle mass (particle density ρp and particle diameter dp), i.e
In the MAWJ process, a large number of variables are involved and virtually all these variables affect the cutting results.
Mechanical Sciences Vol.49 (3) (2007), p. 306-316

Synthetic quartz crystal quality can be verified by quality factor [2].
As there are the serious distortions of crystals in the -x district to affect the normal growth of the crystals and then form disorders in the crystal growth process so that OH- and other impurities enter alternately.
This requires that the dissolution of seed crystal in lye should be properly controlled in the production process in order to eliminate the destructive layer caused by mechanical cutting without seed crystal penetration generated.
The relationships among impurity content and their distribution in artificial rock crystal as well as the Q value with electrical properties were analyzed and compared using this method.
Optical Properties of Rapidly Growth KDP Crystal Improved by Themal Condioning[J].

Affected by the quantum confinement, NPs behave quite differently from the bulk and atomic state of the same material.
They exhibit many extraordinary properties in terms of their responses to optical irradiation [4] and chemical reactions [5].
These properties are normally dependent on their shapes, sizes and compositions.
They also exhibit large surface-to-volume ratio and high mechanical strength, which make NPs especially suitable for biochemical sensing [6] and optothermal local heating [3, 7].
The enhancement factor at emission peak agrees with that from the fluorescence images.

The osseointegration of titanium (Ti) implants highly depends on their surface properties, including roughness, wettability and composition.
X-ray diffraction (XRD), scanning electron microscopy (SEM), 3D Laser Scanning Microscope (3D LSM), and fluorescence microscope were used to investigate the properties of the samples.
Among the factors that lead to the clinical failure, a lack of osseointegration of Ti-based implants plays an important role, and thus limits the application of Ti-based implants for both short- and long-term fixation with the surrounding bone tissue [3].
The osseointegration of implants highly depends on their surface properties, since the implant surface is the site where all the biological reactions occur after the implantation [4].
Grimes, A review on highly ordered, vertically oriented TiO2 nanotube arrays: Fabrication, material properties, and solar energy applications, Solar Energy Materials and Solar Cells, 90 (2006) 2011-2075