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Online since: December 2012
Authors: Jian Chao Zhan
Study on the properties of polyester fabric by Ni/Co/Fe multilayer electroless plating technology
Jianchao Zhan
College of Materials and Textile Engineering, University, Jiaxing, Zhejiang, 314001, China
zhan1jian2chao3 @163.com
Keywords: electroless plating; multilayer; microwave absorption;
Abstract.
Electroless nickel plating has been used in many industrial applications due to its outstanding deposition properties, such as excellent corrosion,wear resistance and deposit uniformity [3].
Results and discussion Surface morphology The surface morphology of metallic fabric may affect their electrical, mechanical, and optical properties.
Ni/Co/Fe-plated fabric f.Ni/Fe/Co-plated fabric Figure 1 Scanning electron microscopy image of plated Fabric Microwave Absorbing Properties of the plated fabric On the base of electroless plating techniques, we have plated Ni, Co and Co/Ni,Co/Fe,Ni/Co/Fe and Ni/Fe/Co on PET fabric respectively,which parameters are listed in Table2 and the microwave absorbing properties of plated fabric was tested by the Vector network analyzer -R/SZVL6,which are shown in Figure 2.
The type, content and distribution of metal particles are also the important factor for microwave absorbing properties of plated fabric. 3.The handle of plated fabric is positive correlation to the surface density of which.
Electroless nickel plating has been used in many industrial applications due to its outstanding deposition properties, such as excellent corrosion,wear resistance and deposit uniformity [3].
Results and discussion Surface morphology The surface morphology of metallic fabric may affect their electrical, mechanical, and optical properties.
Ni/Co/Fe-plated fabric f.Ni/Fe/Co-plated fabric Figure 1 Scanning electron microscopy image of plated Fabric Microwave Absorbing Properties of the plated fabric On the base of electroless plating techniques, we have plated Ni, Co and Co/Ni,Co/Fe,Ni/Co/Fe and Ni/Fe/Co on PET fabric respectively,which parameters are listed in Table2 and the microwave absorbing properties of plated fabric was tested by the Vector network analyzer -R/SZVL6,which are shown in Figure 2.
The type, content and distribution of metal particles are also the important factor for microwave absorbing properties of plated fabric. 3.The handle of plated fabric is positive correlation to the surface density of which.
Online since: July 2004
Authors: Alain Reza Yavari, Tarek Benameur, Manuel François, B. Guelorget, K. Hajlaoui
It has been
confirmed that some metallic glasses have a unique combination of various properties and are
suitable for many applications [4].
Further details on the evolution of the inhomogeneous deformation in the Zr-based metallic glasses at the submicron scale are deduced from nanoindentation tests as well as changes in mechanical properties.
Mechanical properties were assessed by nanoindentation using a nanoindenter XP/ MTS equipped with a continous stiffness measurement CSM option.
Moreover,. the main equatorial instrumental factors (detailed in ref [24]) affecting the diffraction-line profile and position are accomplished numerically.
Hence, we can estimate the order of magnitude of the variation affecting peak position due to a surface with rugosity such as 'pile-up' and deep impressions on ribbon's surface.
Further details on the evolution of the inhomogeneous deformation in the Zr-based metallic glasses at the submicron scale are deduced from nanoindentation tests as well as changes in mechanical properties.
Mechanical properties were assessed by nanoindentation using a nanoindenter XP/ MTS equipped with a continous stiffness measurement CSM option.
Moreover,. the main equatorial instrumental factors (detailed in ref [24]) affecting the diffraction-line profile and position are accomplished numerically.
Hence, we can estimate the order of magnitude of the variation affecting peak position due to a surface with rugosity such as 'pile-up' and deep impressions on ribbon's surface.
Online since: January 2012
Authors: C. Rathod, D. Wexler, T. Chandra, H. Li
Plastic deformation over the top surface of the centre of the rail was less, consistent with expected mechanical property advantages of martensitic stainless steel over medium carbon rail steel (hardness, toughness, flow stress).
Factors contributing to these results include; (i) the higher hardness of the martensitic stainless steel over the rail steel, (ii) changes in head hardness of the head hardened steel as a function of depth and (iii) surface strain hardening effects associated with deformation during service life.
Further SEM-EBSD and advanced electron microscopy will be required to relate this to microstructure and properties.
Compared to head hardened rail, the laser coated IRJ suffered less damage for the same heavy haul lifecycle, apparently due to the improved mechanical properties of martensitic stainless steel over medium carbon rail steel. 3.
Two approaches might be considered to improve the properties of the coated IRJ; redesigning the shape and position of the hard facing region to reduce surface deformation mismatches during service and selection of a weld deposit material of compatibility of thermal expansion properties.
Factors contributing to these results include; (i) the higher hardness of the martensitic stainless steel over the rail steel, (ii) changes in head hardness of the head hardened steel as a function of depth and (iii) surface strain hardening effects associated with deformation during service life.
Further SEM-EBSD and advanced electron microscopy will be required to relate this to microstructure and properties.
Compared to head hardened rail, the laser coated IRJ suffered less damage for the same heavy haul lifecycle, apparently due to the improved mechanical properties of martensitic stainless steel over medium carbon rail steel. 3.
Two approaches might be considered to improve the properties of the coated IRJ; redesigning the shape and position of the hard facing region to reduce surface deformation mismatches during service and selection of a weld deposit material of compatibility of thermal expansion properties.
Online since: April 2019
Authors: Fred J. Davis, Geoffrey R. Mitchell, Spiridon Koutsonas
Degradation refers to the irreversible process by which an organic precursor deteriorates due to different external factors such as thermal, mechanical, light, or microwave treatment.
The microwave power absorption on the irradiated materials is predominantly affected by dielectric properties, which are changed by the material temperature.
Therefore microwave power absorption of the irradiated PAN material can affect its dielectric properties, static electrical conductivity as reported by Koutsonas [11] and possibly create a carbonised porosity with high surface area, which are collectively referred to as degradation of PAN and are important factors for materials in applications such as supercapacitors for mobile applications.
If the variations in these properties can be detected after microwave treatment they can be indicative of the degree of degradation of the PAN [11]. 3.
More important factors in the performance of applications such as supercapacitors are if the variations in porosity can be detected after microwave treatment they can be indicative of the degree of degradation of the PAN.
The microwave power absorption on the irradiated materials is predominantly affected by dielectric properties, which are changed by the material temperature.
Therefore microwave power absorption of the irradiated PAN material can affect its dielectric properties, static electrical conductivity as reported by Koutsonas [11] and possibly create a carbonised porosity with high surface area, which are collectively referred to as degradation of PAN and are important factors for materials in applications such as supercapacitors for mobile applications.
If the variations in these properties can be detected after microwave treatment they can be indicative of the degree of degradation of the PAN [11]. 3.
More important factors in the performance of applications such as supercapacitors are if the variations in porosity can be detected after microwave treatment they can be indicative of the degree of degradation of the PAN.
Online since: September 2015
Authors: Ivo Kusák, Jan Martinek, Ladislav Carbol
Each have unique properties and also limitations.
It is known that several factors are affecting modulus of elasticity of concrete.
Air filled pores and micro-cracks play a major role in affecting the stress-strain performance of concrete [5].
Mechanical properties of the material are closely connected to the velocity of an ultrasonic wave.
More about MLS properties can be found in [11,12,13].
It is known that several factors are affecting modulus of elasticity of concrete.
Air filled pores and micro-cracks play a major role in affecting the stress-strain performance of concrete [5].
Mechanical properties of the material are closely connected to the velocity of an ultrasonic wave.
More about MLS properties can be found in [11,12,13].
Online since: November 2014
Authors: Jan Jowsa, Agnieszka Benduch, Rafał Wyczółkowski
That is because the course of those operations has an effect on a series of factors connected with the whole production cycle.
On their basis, in the heated element, beside the temperature, the microstructure of the material and the corresponding mechanical properties are determined.
Numerical algorithms of such models are based on the equations of heat transport, recrystallization kinetics and grain growth, as well as the correlations between the microstructure of the given material and its mechanical properties.
The radiational heat flux is calculated by means of the method of surface radosity balance and the notion of view factors [17].
S. de Lemos (Eds.), Cellular and Porous Materials: Thermal Properties Simulation and Prediction, WILEY-VCH Verlag GmbH&Co, 2008, pp. 199-238
On their basis, in the heated element, beside the temperature, the microstructure of the material and the corresponding mechanical properties are determined.
Numerical algorithms of such models are based on the equations of heat transport, recrystallization kinetics and grain growth, as well as the correlations between the microstructure of the given material and its mechanical properties.
The radiational heat flux is calculated by means of the method of surface radosity balance and the notion of view factors [17].
S. de Lemos (Eds.), Cellular and Porous Materials: Thermal Properties Simulation and Prediction, WILEY-VCH Verlag GmbH&Co, 2008, pp. 199-238
Online since: July 2011
Authors: Han Wu Liu, Rui Hua Dong, Fan Feng
Its shape and property affect a lot about the bearing ability and the service life.
Therefore, selecting appropriate retainer materials, structure and molding process has become the key to improve the property and reliability of high-speed vehicles bearing[2].
Summing up the analysis above, take the all factors into consideration comprehensively, the injection parameters are selected as: material melting temperature of 295 ˚C; 100 ˚C mold temperature, injection time of 3.69 s; mold material is standard steel Tool TEEL p-20, which nature is: density 7.8 g/cm3 modulus 2.0×105 MPa; The injection molding machine is select default device; maximum injection pressure is 180 MPa; maximum clamping force is 7000 T.
But it is better that locates weld lines in the areas where the force is small, and it can not affect the appearance.
It is 0.03% of the total size of the product, almost does not affect the products quality.
Therefore, selecting appropriate retainer materials, structure and molding process has become the key to improve the property and reliability of high-speed vehicles bearing[2].
Summing up the analysis above, take the all factors into consideration comprehensively, the injection parameters are selected as: material melting temperature of 295 ˚C; 100 ˚C mold temperature, injection time of 3.69 s; mold material is standard steel Tool TEEL p-20, which nature is: density 7.8 g/cm3 modulus 2.0×105 MPa; The injection molding machine is select default device; maximum injection pressure is 180 MPa; maximum clamping force is 7000 T.
But it is better that locates weld lines in the areas where the force is small, and it can not affect the appearance.
It is 0.03% of the total size of the product, almost does not affect the products quality.
Online since: April 2021
Authors: Xue Wei Li, Hui Zi Zhou
All these factors promote the polarization of public opinion transmissions in a self-media network.
Each time a popular topic is accepted, the energy of the self-media user can be increased, which has the property of diminishing returns.
This is because the initial temperature and probability parameter are the indirect action factors and the direct action factors, respectively, of the transmission probability, which can keep the transmission probability from obtaining a larger value for a long time and prolong the propagation time and range of the event.
This section takes the "Liu Guo Liang's resignation event" as an example in order to study the relationship between these two metrics and the influencing factors
Chinese journal of mechanical engineering, 2016, 52(6)166-173
Each time a popular topic is accepted, the energy of the self-media user can be increased, which has the property of diminishing returns.
This is because the initial temperature and probability parameter are the indirect action factors and the direct action factors, respectively, of the transmission probability, which can keep the transmission probability from obtaining a larger value for a long time and prolong the propagation time and range of the event.
This section takes the "Liu Guo Liang's resignation event" as an example in order to study the relationship between these two metrics and the influencing factors
Chinese journal of mechanical engineering, 2016, 52(6)166-173
Online since: August 2013
Authors: Xue Chen, Jun Wei Zhen, Ling Li Cui
Bearing system’s multi-flexible rigid-flexible coupling modeling
3.1 Modeling method for flexible body in ADAMS
There are mainly two methods for building flexible body in ADAMS: 1) Discrete Method, i.e. to divide the ADAMS rigid model that has certain geometric entity into several entities block, and define each one’s mechanical properties, use flexible beam joint to build ADAMS flexible body between the separated small rigid members; 2) Import Modal Neutral File Method, i.e.
Define material properties and boundary conditions According to the characteristics of bearing outer ring to fix the contact surface between the bearing outer ring and the bearing pedestal, and impose torque in the bearing inner ring.
Coal mine mechanical and electrical, 2009, (2): 7 - 9
Mechanical Dynamics Inc. 2000
Mechanical science and technology, 2002, 21(6): 892 - 895
Define material properties and boundary conditions According to the characteristics of bearing outer ring to fix the contact surface between the bearing outer ring and the bearing pedestal, and impose torque in the bearing inner ring.
Coal mine mechanical and electrical, 2009, (2): 7 - 9
Mechanical Dynamics Inc. 2000
Mechanical science and technology, 2002, 21(6): 892 - 895
Online since: February 2016
Authors: G. Srinivasa Rao, C.S. Venkatesha, M. Vishwas, M. Vinyas
Linear buckling analysis (stability analysis) is carried out to determine buckling factors.
2.
The required material properties (i.e.
a) Mechanical properties of CFRP (BD- M18/43090 lamina) The Material and Strength properties of the bi-directional CFRP laminate used as an alternate material to Aluminium are given in Table 3a and 3b respectively.
Table 13: Buckling factors Inertial load Baffle Thickness (mm) Loading direction Buckling factors 50g 0.6 X 297.16 Y 169.00 Z 171.42 a) Buckling factor plots The deflection shapes of the baffle for the loading directions mentioned in Table 13 are shown in Fig.16.
Haider Al-Zubaidy, Xiao-Ling Zhao, Riadh Al-Mahaidi “Mechanical characterization of the dynamic tensile properties of CFRP sheet”, Composite Structures 96 (2013) 153–164.
The required material properties (i.e.
a) Mechanical properties of CFRP (BD- M18/43090 lamina) The Material and Strength properties of the bi-directional CFRP laminate used as an alternate material to Aluminium are given in Table 3a and 3b respectively.
Table 13: Buckling factors Inertial load Baffle Thickness (mm) Loading direction Buckling factors 50g 0.6 X 297.16 Y 169.00 Z 171.42 a) Buckling factor plots The deflection shapes of the baffle for the loading directions mentioned in Table 13 are shown in Fig.16.
Haider Al-Zubaidy, Xiao-Ling Zhao, Riadh Al-Mahaidi “Mechanical characterization of the dynamic tensile properties of CFRP sheet”, Composite Structures 96 (2013) 153–164.