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Online since: February 2011
Authors: Dong Ying Ju, Xiao Hu Deng, Liwen Zhang
It provides a link for multiscale modeling to bridge the mesoscopic dislocation activities with the macroscopic mechanical properties.
However, the percentage of DRX is not only related to the thermo-mechanical parameters, but also influenced by the initial microstructure.
It is seen that the stable grain size with different initial grain sizes is almost the same under the same thermo-mechanical parameters.
The quantity of possible nucleation sites can be a key factor that controls the microstructure evolution of DRX.
Initial grain sizes affect the kinetics of DRX because of the change of grain boundary surface fractions for the nucleation of new grains.
However, the percentage of DRX is not only related to the thermo-mechanical parameters, but also influenced by the initial microstructure.
It is seen that the stable grain size with different initial grain sizes is almost the same under the same thermo-mechanical parameters.
The quantity of possible nucleation sites can be a key factor that controls the microstructure evolution of DRX.
Initial grain sizes affect the kinetics of DRX because of the change of grain boundary surface fractions for the nucleation of new grains.
Online since: August 2024
Authors: Christian Liguda, Tom Birkoben, Soenke Habenicht, Hans-Juergen Funke, Zh. Li, H. Fan, O. Dong, A J. Garete
Influence of Material Properties on Ruggedness Evaluation of Package Architectures for SiC Power Devices
H.
It has been shown that different thermomechanical properties of the mold compounds as well as the usage of different adhesion promoter materials have a significant effect on the adhesion properties of the mold compound to the leadframe surface of the SiC power devices, which have direct impact on the ruggedness and lifetime stability.
Package architectures have to be carefully chosen, especially as the thermomechanical properties of the package and module material stack are different due to the special properties of SiC compared to conventional Si-power devices.
The type of adhesion promoter must be carefully balanced between the special properties of EMC, the underlying material surface – in this case Cu-leadframe, but also the special properties of SiC-chip surfaces have to be taken into account such as metal layers and polyimide coating.
The initial wire properties such as the yield strength, CTE, and modulus are important parameters to predict and control the wire bond performance.
It has been shown that different thermomechanical properties of the mold compounds as well as the usage of different adhesion promoter materials have a significant effect on the adhesion properties of the mold compound to the leadframe surface of the SiC power devices, which have direct impact on the ruggedness and lifetime stability.
Package architectures have to be carefully chosen, especially as the thermomechanical properties of the package and module material stack are different due to the special properties of SiC compared to conventional Si-power devices.
The type of adhesion promoter must be carefully balanced between the special properties of EMC, the underlying material surface – in this case Cu-leadframe, but also the special properties of SiC-chip surfaces have to be taken into account such as metal layers and polyimide coating.
The initial wire properties such as the yield strength, CTE, and modulus are important parameters to predict and control the wire bond performance.
Online since: December 2023
Authors: P. Sivasamy, I. Saravanan, Ayyannan Devaraju, R. Gopi
The factors affecting these coating are ion energy, incidence angle, ion to atom arrival ratio, pressure and temperature.
Mechanical Properties of TiN coatings Table 1.
Mechanical Properties of Titanium Nitride coatings S.No.
Because of its excellent mechanical and tribological properties.
The overall performance of PVD-TiN coatings as well as their wear resistance and behavior are strongly influenced by many key factors including like substrate, properties of counterpart, applied load and speed.
Mechanical Properties of TiN coatings Table 1.
Mechanical Properties of Titanium Nitride coatings S.No.
Because of its excellent mechanical and tribological properties.
The overall performance of PVD-TiN coatings as well as their wear resistance and behavior are strongly influenced by many key factors including like substrate, properties of counterpart, applied load and speed.
Online since: July 2015
Authors: Filip Vogel, Petr Konvalinka, Jan Machovec
Brückner et al. speak about fact, that uniaxial loading tests are affected by many factors.
They tried what the various mixing procedure and curing conditions do with a matrix flowability and mechanical properties of the composite.
Monteiro, Concrete: microstructure, properties, and materials.
Konvalinka, 2015, Development of mechanical properties of steel fibers reinforced high strength concrete, Advanced Materials Research, Vol. 1077, pp. 113-117
Reiterman, 2014, Effects of Different Types of Steel Fibers on the Mechanical Properties of High Strength Concrete, Advanced Materials Research, Vol. 1054, pp. 80-84.
They tried what the various mixing procedure and curing conditions do with a matrix flowability and mechanical properties of the composite.
Monteiro, Concrete: microstructure, properties, and materials.
Konvalinka, 2015, Development of mechanical properties of steel fibers reinforced high strength concrete, Advanced Materials Research, Vol. 1077, pp. 113-117
Reiterman, 2014, Effects of Different Types of Steel Fibers on the Mechanical Properties of High Strength Concrete, Advanced Materials Research, Vol. 1054, pp. 80-84.
Online since: August 2015
Authors: Samraj Ravi, T.V. Moorthy, R. Ravi Raja Malarvannan
By the modification of surface of the material the corrosion resistance and wear properties can be improved.
Solid electrolyte layer has been formed by ceramic coating and the properties have been studied [9].
The factors affecting the choice of coating process and composition are reviewed [12].
Mechanical and tribological properties of W/WCN bilayer coatings have been analyzed [15].
References [1] Ekrem Altuncu, Fatih Ustel, Correlation between sputtering conditions and growth properties of (TiAl)N/AlN multilayer coatings, Mat.
Solid electrolyte layer has been formed by ceramic coating and the properties have been studied [9].
The factors affecting the choice of coating process and composition are reviewed [12].
Mechanical and tribological properties of W/WCN bilayer coatings have been analyzed [15].
References [1] Ekrem Altuncu, Fatih Ustel, Correlation between sputtering conditions and growth properties of (TiAl)N/AlN multilayer coatings, Mat.
Online since: June 2010
Authors: Shi Cheng Zhang, Li Na Dong, Jiu Yin Pang, Chuan Sun
Research will be used description the
solid content etc. of polymerization process used measure weight、viscosity etc., and analysis of
particle structure and shape by TEM, SEM, analysis the surface properties of particles by FTIR, and
ascertain by measuring adhesion properties of different emulsion on the same substrate by strength
capability.
Introduction The natural protein adhesives was the beginning of the industrial application of wood adhesive [1-2] , its characteristic is abundant raw materials, cheap price, hot, cold, especially not stink, suitable for food packaging materials, Defect is poor, and add water resistance of much quantity of soybean protein, thus affecting the quality of the products.
[4] Cheng E Z, Sun X Z, karr S G, Adhesive properties of modified soy-bean flour in wheat straw particleboard [J].
Adhesion properties of soy-protein with fiber cardboard[J].J.
Alkali-Modified Soy-Protein with Improved [9] Adhesive and Hydrophobic Properties[J].J.Am.Oil.Chem.Soc.,1995,72(12): 1461~1464 [10] Zhao Ke, Hao Xufeng, Liu Dazhuang.
Introduction The natural protein adhesives was the beginning of the industrial application of wood adhesive [1-2] , its characteristic is abundant raw materials, cheap price, hot, cold, especially not stink, suitable for food packaging materials, Defect is poor, and add water resistance of much quantity of soybean protein, thus affecting the quality of the products.
[4] Cheng E Z, Sun X Z, karr S G, Adhesive properties of modified soy-bean flour in wheat straw particleboard [J].
Adhesion properties of soy-protein with fiber cardboard[J].J.
Alkali-Modified Soy-Protein with Improved [9] Adhesive and Hydrophobic Properties[J].J.Am.Oil.Chem.Soc.,1995,72(12): 1461~1464 [10] Zhao Ke, Hao Xufeng, Liu Dazhuang.
Online since: December 2013
Authors: S. Abdullah, D.A. Wahab, Rozli Zulkifli, A.M.T. Arifin
However, the material chosen must be according to the desired mechanical properties and the application [4].
The mechanical properties for all specimens from tensile test are listed in table 1.
However, in this case the behavior of lamination varies with several factors such as fiber volume fraction, matrix material, fiber material and manufacturing processes [14].
Coutinho, Mechanical Properties of Polymer Composites based on Commercial Epoxy Vinyl Ester Resin and Glass Fibre, Int.
Maleque, Mechanical Properties of Epoxy/Coconut Shell FillerParticle Composites, The Arabian Journal for Sciences and Engineering 28 (2003) 171-181
The mechanical properties for all specimens from tensile test are listed in table 1.
However, in this case the behavior of lamination varies with several factors such as fiber volume fraction, matrix material, fiber material and manufacturing processes [14].
Coutinho, Mechanical Properties of Polymer Composites based on Commercial Epoxy Vinyl Ester Resin and Glass Fibre, Int.
Maleque, Mechanical Properties of Epoxy/Coconut Shell FillerParticle Composites, The Arabian Journal for Sciences and Engineering 28 (2003) 171-181
Online since: September 2020
Authors: Truong Quoc Thanh, Truong Minh Nhat, Tu Vinh Thong, Tran Trong Quyet, Luu Phuong Minh
There is a great difference in mechanical properties, because Intermetallic Compound (IMC) in traditional weld is easily to damage or rapidly to destroy under the acting force.
In particular, rotational speed is the main factor affecting the welding temperature in Fig. 10.
Parametric optimization is related to the properties of welding process.
In particular, rotational speed is the main factor affecting the welding temperature.
SEM images determine some properties of welding materials.
In particular, rotational speed is the main factor affecting the welding temperature in Fig. 10.
Parametric optimization is related to the properties of welding process.
In particular, rotational speed is the main factor affecting the welding temperature.
SEM images determine some properties of welding materials.
Online since: October 2011
Authors: Lan Yun Qin, Guang Yang, Wei Wang, Xing Lang Wang
Introduction
As a good mechanical properties of the metal Titanium alloy has been applied in many fields.
To analyze the major factors that affect temperature field during the laser cladding, the paper builds a finite element model of temperature field of titanium alloys laser cladding in consideration of heat source model, material thermal physical property and meshing situation.
Material thermo-physical properties: The experimental substrate is TC4 titanium alloy, which nominal thermo-physical properties is shown in Tab.1,and the cladding layer powder material is mixtures of Cr3C2 powder and pure Ti powder.
The thermo-physical properties of Cr3C2 and Ti powder are shown in Tab.2 and Tab.3.
As the thermo-physical properties of material are of great influence on calculating temperature field ,which directly affect the shape and size of the laser cladding temperature field, it is necessary to take into account temperature dependency of the thermal properties of the material Table 1 Thermo-physical properties of TC4 titanium alloy melting points[℃]:1540~1650 density[kg/m3]:4440 T[℃] 20 100 200 300 400 500 600 800 1000 1400 1600 heat conductivity[W/(m•℃)] 6.8 7.4 8.7 9.8 10.3 11.8 12.4 14.4 15.8 24.3 22.2 Specific heat[J/(kg•℃)] 611 624 653 674 691 703 708 727 751 783 898 Coefficient of linear expansion[10-6/K] 9.0 9.0 9.0 9.0 9.0 9.4 9.4 9.7 9.7 9.7 9.7 Table 2 Thermo-physical properties of Cr3C2 specific heat [kj/kg·K] coefficient of linear expansion[10-6/K] elastic modulus[Pa] density [kg/m3] Melting points [˚C] heat conductivity [W/m·K] 0.3 6.74 0.355E11 6900 3530 19 Table 3 Thermo-physical properties of titanium melting points[℃]:1668±4 density:[kg
To analyze the major factors that affect temperature field during the laser cladding, the paper builds a finite element model of temperature field of titanium alloys laser cladding in consideration of heat source model, material thermal physical property and meshing situation.
Material thermo-physical properties: The experimental substrate is TC4 titanium alloy, which nominal thermo-physical properties is shown in Tab.1,and the cladding layer powder material is mixtures of Cr3C2 powder and pure Ti powder.
The thermo-physical properties of Cr3C2 and Ti powder are shown in Tab.2 and Tab.3.
As the thermo-physical properties of material are of great influence on calculating temperature field ,which directly affect the shape and size of the laser cladding temperature field, it is necessary to take into account temperature dependency of the thermal properties of the material Table 1 Thermo-physical properties of TC4 titanium alloy melting points[℃]:1540~1650 density[kg/m3]:4440 T[℃] 20 100 200 300 400 500 600 800 1000 1400 1600 heat conductivity[W/(m•℃)] 6.8 7.4 8.7 9.8 10.3 11.8 12.4 14.4 15.8 24.3 22.2 Specific heat[J/(kg•℃)] 611 624 653 674 691 703 708 727 751 783 898 Coefficient of linear expansion[10-6/K] 9.0 9.0 9.0 9.0 9.0 9.4 9.4 9.7 9.7 9.7 9.7 Table 2 Thermo-physical properties of Cr3C2 specific heat [kj/kg·K] coefficient of linear expansion[10-6/K] elastic modulus[Pa] density [kg/m3] Melting points [˚C] heat conductivity [W/m·K] 0.3 6.74 0.355E11 6900 3530 19 Table 3 Thermo-physical properties of titanium melting points[℃]:1668±4 density:[kg
Online since: December 2014
Authors: James M. Hill, Yue Chan, Ngamta Thamwattana
Introduction
Since the discovery of carbon nanotubes in 1991 by Iijima [2], numerous experimental, theoretical, and computational investigations have been performed to investigate their superior and unique chemical, electronic and mechanical properties.
Owing to these extreme properties, carbon nanotubes are ideal candidates for NEMS, which open up a vast area of potential applications such as pressure and mass sensors, nanotweezers, RAMs, and actuators [3, 4].
The applied gate voltage bends the nanotube and affects both the nanotube’s electrical and mechanical properties (See Fig. 1 for a schematic).
The applied gate voltage pushes electrons inside the nanotube downwards by the electrostatic force which alters the nanotube’s mechanical properties.
Hierold, From micro to nano systems: Mechanical sensors go nano. 14 (2004) 1-11
Owing to these extreme properties, carbon nanotubes are ideal candidates for NEMS, which open up a vast area of potential applications such as pressure and mass sensors, nanotweezers, RAMs, and actuators [3, 4].
The applied gate voltage bends the nanotube and affects both the nanotube’s electrical and mechanical properties (See Fig. 1 for a schematic).
The applied gate voltage pushes electrons inside the nanotube downwards by the electrostatic force which alters the nanotube’s mechanical properties.
Hierold, From micro to nano systems: Mechanical sensors go nano. 14 (2004) 1-11