Elastic index is the required important parameters in the theoretical analysis and design calculation of components. Mechanical testing method and electrical measuring method are commonly used in engineering mechanics experimental. This article discusses the ultrasonic method which is used to measure...

Fatigue failure is very common phenomenon in engineering field, and fatigue problem is more and more prominent with the development of modern social production to high speed, high temperature, high strength load. In process of college undergraduate course graduation design and innovative experiments,...

The microstructure (before and after quenching), phase (before quenching), carbide content and hardness were studied by scanning electron microscopy, X-ray diffraction, optical software and Rockwell hardness tester. The results indicate that carbides of Cr5 steel have different morphology features and...

The carbon nanotubes and carbon nanotubes reinforced aluminum matrix composite materials was described, the basic characteristics about carbon nanotubes preparation methods of aluminum matrix composites and preparation process problems and solutions. Finally, the carbon nanotubes reinforced aluminum...

The selection of cement slurry with different consistency and different concentrations of Sodium silicate, design and test research on the mixture ratio of cement-Sodium silicate grouting material, 4 W/C and 4 0Bé co design 16 groups of proportion, through the collation and analysis of experimental data,...

In the premise of selecting different consistency of cement slurry, deploy different concentrations of Sodium silicate, design 16 groups of ratio, design and test research on cement and Sodium silicate double liquid grouting material mixture ratio, through the collation and analysis of experimental data,...

Nanodiamond (ND) as a filler material provides a nucleation effect on polyphenylene sulfide (PPS) and promotes its crystallization. The effects of ND on crystallization behavior and kinetics of composites were investigated by DSC. The results show that ND acts as an nucleating agent for PPS to accelerate...

In this paper, CuW alloy is successfully coated on copper substrate by microwave sintering. A wedged load test and scanning electronic microscopy (SEM) are employed to investigate the interface bonding performance. The results show that the CuW coating bonds firmly to the copper substrate without any...

In this paper catastrophic optical mirror damage(COMD) mechanism of the semiconductor laser is analyzed. COMD is one of major device damage mechanisms, which is drastically limited laser lifetime and output optical power. The theoretical model that based on heat source with injection current and optical...

The high vacuum cleaving passivation characteristic on 980nm diode laser is presented. In this research, diode lasers are cleaved in high vacuum cleaving system, and then coated with thin ZnSe passivation layer in the front and the back facet. The function of the passivation layer is to protect diode...

China railway passenger cars from 25B green cars to the development of high speed EMU, the battery is still followed the lead-acid battery and cadmium nickel battery, battery containing heavy metal railway passenger cars will bring great harm to the environment. Through access to a large number of data...

The brick crusher hammers were used in factory, which wear-resisting was poorer. According this phenomenon, the single structure was designed in symmetrical fission structure. Firstly, high chromium cast and low alloy steel were casted into half of the bimetal hammer head, then two new type bimetal hammer...

According to the working conditions and performance requirements of relieving, this topic designed four groups of chemical composition for the text and put forward a complete set of heat treatment process. And found a set of optimal component ratio and the heat treatment process by the experimental steel...

An electrodeposited Ni-Fe alloy with a nickel content of 75% was introduced in this paper, thickness of this Ni-Fe alloy is 1mm. Microstructure, tensile mechanical, and hardness and the phase were studied by using field emission scanning electron microscopy (FE SEM), tensile test, hardness tester and...

As a new welding method, combustion synthesis welding technology caused widespread concern at home and abroad in recent years. The combustion synthesis technology, the concept of combustion synthesis welding, classification, welding process characteristics and influence factors were introduced. The combustion...

The surface properties of coating layer have an important influence on printing quality. In this research, the main objective was to investigate into the coating surface topography and characteristics related to binder. The surface microstructure and properties were explored in the method of numerical...

The welding property of the Aluminized steel is analyzed in this article, TIG welding technology of Aluminized steel is presented on the base of mass experimentations, it proves that this technology can effectively prevent the welding crack and improve the property of the weld joint.

Aluminum has great application in the machinery, transportation, aviation and military and other fields, because of its light weight, rich in resources, good comprehensive properties. Structure determines the properties, in order to obtain good properties, the key is to get the fine and uniform equiaxed...

In order to characterizing the binder distribution, Changed drying temperatures were used to alter binder distribution in coating drying process, which was used to investigate into the effect of drying condition on the binder distribution and characterize the binder migration in the method of numerical...

The microstructure and texture analysis of Ti-6Al-4V are investigated through SEM (Scanning Electron Microscope). Based on original references, the results show that, the to phase transformation at the welding center enhances yield strength and ultimate strength through orientations distribution. In...

In this study, prickle sensation was investigated for wear fabrics having different compositions and physical surface characteristics using 1-7 rating scale. Rating score test for prickle sensory discomfort wear fabric test was conducted on 31 subjects. It was found that prickleness sensation arise during...

Using a single screw extruder for extruding pure UHMWPE, one of the necessary conditions is to generate large enough extrusion pressure [4]. This article launches a comprehensive and detailed study of raw material of the pure UHMWPE resin powder, establishes a mathematical model of extrusion molding...

Taking 5083 aluminum alloy plate in cold bending test for example, according to the different measuring results of the elastic rebound angle, the bending properties of 5083 aluminum alloy is studied.And the data statistics and analysis are finished,The experience curve of “the rebound angle with R/s”...

There are derivative many problems from electromagnetic (EM) wave radiation with the development of communication technique. To protect the human body from the EM radiation, in this study, the antibacterial nylon (AN)/ bamboo charcoal polyester (BC-PET)/ stainless steel wire (SSW) metal composite yarns...

Epoxy resin composites filled with nanoparticles are widely used for electrical devices such as insulators, VLSI package and rocket engine shell materials. An experimental study on the mechanical property of SiO2-filled epoxy resin composite was carried out by the electronic universal testing machine....

The cyclic oxidation behaviors of Fe-15Cu alloys with different Al concentration at 800 oC were studied. The oxidation kinetics showed that the oxidation process of Fe-15Cu alloys followed the parabolic law, Fe-15Cu-5Al alloy was oxidized more seriously than that of Fe-15Cu-15Al alloy. Analysis of the...

The load-relieving material is described by Mooney-Rivlin model. Dynamical response of projectile-based CCD camera is derived by total Lagrangian Increment Method, and the results is simulated numerically by finite element method. The rule of variation of load-relieving materials’ elastic modulus on...

To research on the equivalent of perforating through LY12CZ aluminum alloy plates and 2 armor steel, based on the rule that the ultimate velocity, the penetration process of tungsten sphere into LY12CZ aluminum alloy plate and 2 armor steel plate was simulated with LS-DYNA finite element code, the numerical...

Based on Density Functional Theory, we investigated the optical structures and the electronic properties of Cu doped SnO2 with density of 4.35%, including band structure, the density of state (dos), reflectivity spectrum and optical absorption spectrum. The results show that Fermi level access conduction...

This article introduced the technologies of die to package .these mainly including wire bonding(WB),tape-automated bonding(TAB),and flip chip(FC).the most common wire bonding technique is ball bonding. This is the foundation of the others .at the end parts, the paper illustrated the new interconnection...

The effects of Fe doping on the electronic properties of MgO have been studied by ab initio method. Iron (Fe) changes the lattice constants while does not change the cell angels. The calculated band shows MgO is an insulator. Iron doping introduces a band level in the band gap, which increases the conduction...

We have studied the electronic properties of MgO by first principles (CASTEP program). The calculated band gap of MgO shows MgO is an insulator. Pressure increases the band gap from 4.253 to 7.585 eV. The band above the Fermi level shifts to higher energy, while the band below the Fermi level shifts...

In the paper a new solder is made by adding trace LaNd into Zn9.3Al7Cu alloy to improve the performance through alloying principle. The impact of the content of LaNd on physical properties of Zn9.3Al7Cu solder is investigated. Results show that the density of solder alloys increases with the increasing...

Cobalt oxide/graphene (Co3O4/rGO) was successfully prepared using hydrothermal method. The major aim of the study is to investigate the photocatalytic activities on the removal of methyl orange (MO). These as-prepared catalysts (Co3O4, rGO and Co3O4/rGO) were investigated for the degradation of MO via...

In order to solve the problem of pollution in the strip steel pickling process, we propose a new process of wet shot blasting, adding water system in the conventional shot blasting equipment. Through the finite element software ANSYS/LS-DYNA, we conduct the dynamic simulation of dry and wet shot blasting...

In the process of producing PAN precursor used in carbon fiber, applying orthogonal experiment method and a dry-wet spinning technology, the main systematical study are the influence of coagulation bath, jet stretch, pre-draft and water-bath draft on degree of orientation. Results show that under applying...

In The technology of surface alloying by electron beam had been developed as a new surface treatment in recent decades. Based on the introduction of the principle of electron beam, focuses on the research status of the surface alloying by electron beam, and a brief introduction of the Surface alloying...

Tube hydroforming is a developed and successful way for complex shapes with less operations required compared to conventional tube forming. Tube hydroforming technology is introduced briefly. Then the principle of forming, advantages and disadvantages of hydraulic bulging, Tube Hydroforming with Radial...

In order to study the pyrolysis process of Ethylene Propylene Diene Monomer (EPDM) insulation material and its compression mechanical behaviour under high strain rates, the thermal stability of EPDM was analysed by TGA in the first place. Based on the TG curve and the thermal degradation temperature,...

Compression tests of Mg-4Al-3Ca1.5Zn-1Nd-0.2Mn Magnesium alloy as-extruded were carried out on the Gleeble-3500 thermo-mechanical simulator. The compression testing temperatures were in the range of 200–350 at intervals 50 , while the imposed constant true strain rates were 0.001, 0.01, 0.1, 1 and 10S-1.True...

With the rapid development of science and technology, all kinds of high technical equipment is facing more and more serious problem of vibration isolation buffer under special environment. In order to adapt to this new situation, we designed the metal rubber vibration isolator. Firstly, this paper briefly...

The insulation photovoltaic Building component is a new kind of energy-saving building material with the function of heat insulation and new energy transformation. Because of combustible organic insulation materials and fire risk caused by control circuit fault, the fire performance must be concerned...

An appropriate fatigue crack growth model is the key to accurately evaluate fatigue life of component. Researching on the McEvily model, considering the influence of elastic-plastic behaviour and crack closure, a modified elastic-plastic small crack propagation characterization model is proposed. The...

In this paper, we discuss the influence of different preheating temperature and welding speed on welding residual stress through numerical simulation, which takes a certain type of emu car KK middle end of T type welded joint as an example.Using the double ellipsoid heat source model checking got temperature...

Nanostructure anatase TiO2/carbon nanotubes (TiO2/CNTs) were prepared by hydrothermal process using acid treated CNTs and titanium (IV) sulfate. The materials were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET). The results showed...

In this paper, Au nanorods and Au@Ag nanorods were synthesized by seed –mediated growth process, and the Colloidal quantum dots CdSe/CdS/ZnS were produced by successive ion-layer absorption and reaction methods. A low-cost and practical ligand exchange of oil phase quantum dots and amino-functionalized...

To address the shortcomings of single use of existing fire prevention materials, a novel composite that combined the characteristics of yellow mud and gel was designed and investigated. The composite grout composed of yellow mud and polymer gel can overcome the limitations of single fire prevention materials...

In this paper, an energy analysis model is set up in order to clarify the effect of insulation materials on the thermal performance and the energy consumption of building envelope. Three types of insulation materials commonly used in Germany including mineral fiber, polyurethane and vacuum insulation...

The combination of free planes in the corner of an underground chamber is complex. If the fractures cross the roof and walls, or floor and walls at the same time, a complex key block may exist. The theorem of finiteness in the classical block theory applies only to the convex block, and not to the non-convex....

A study is carried out to investigate the influences of compounding process and surface treatment on nanometre-sized TiO2 filled polystyrene. The compounding process is discussed with a torque rheometer. The TiO2 filler is surface-treated with a liquid titanate coupling agent. The effects of coupling...

It is one of the main failure forms that stress corrosion cracking (SCC) of nickel base alloys and stainless steels in the nuclear pressure vessels and piping. Current researches show that SCC is a process of oxide film rupture and reform. To understand the micro-mechanical state at the SCC crack tip,...

The information of surface topography and structure of coating layer were significant to the chemical-physical properties of coated paper as well as the print quality The main aim of this study was to investigate the effect of coating solid on the binder distribution in the method of numerical analysis...

The surface physical and chemical properties of coating layer have an important effect on the final printing quality. In this study, the main aim was to investigate into the surface characteristics and surface microstructure of coating layer. The surface chemical property was explored by OCA to obtain...

Metallographic examination is a traditional technology. In this paper, etching method of macro inspection of metallographic was set as an example. Through analyzing the example by Su-Field Model and Physical Contradictions, we convert a practical problem into a TRIZ problem, and find out the final solution...

In the power supply system of electrified railway, traction transformer is an important part and its running state plays an important role on the safety of railway operation. In this paper, we will analyze the transformer load curve, simulates the change of the temperature rise and discuss the influence...

Binder is the essential component of coating color recipe, which has an important influence on the surface topography and properties of coating layer. In this research, the main objective was to investigate into the coating surface binder content related to the coating color recipe. The surface binder...

Metal oxide electrical contact materials because it has excellent corrosion resistance, good weldability, high conductivity and high thermal conductivity, in the general application of relay is more and more common. In this paper, the research of system adopts the technology of the preparation of AgSnO2...

ITO nanopowder of the high purity was prepared by self-desigred fabricated arc plasma apparatus. The crystal structure, morphology, particle size distribution and purity were characterized by X-ray diffraction(XRD) , transmission electron microscopy(TEM) and Inductively Coupled Plasma Action Emission...

The important tendency of the new style heat insulation materials is the research and development of the composites which have low thermal-conductivity in high temperature. The characteristics of the alumina-silicate fibre with K2Ti6O13 whiskers and SiO2.aerogel are discussed in this paper. Finally,...

Au/HZSM-5 catalysts were prepared by negative deposition-precipitation method in this paper. XRD/Uv-vis/TEM/NH3-TPD/FT-IR technologies were used to analysis the characterization of prepared catalysts, and the evaluation of the catalysts was carried out by methane adsorption experiment. XRD and TEM showed...

Because of facile synthesis, carbon nanotube (CNT) fibers from chemical vapor deposition can be used for diverse applications. In this study, the electrical property of CNT fibers was investigated. The room-temperature electrical conductivity of a typical CNT fiber was measured to be 5 105 S/m. The electrical-conductivity...

In this work, a new covalent triazine framework based on phthalazinone-containing dinitrile building blocks was prepared by the dynamic nitrile-trimerization reaction. The FT-IR spectra of BCTF illustrated the characteristic peaks of the triazine at 1503 cm-1 and 1360 cm-1. The nitrogen sorption isotherm...

A mixed explosive contains Al powder, hexogen (RDX), paraffin, etc. It is pressed fitting into 20×20mm pillars. The pillars are heated in 55C for 57days and are measured in volume, mass and density. They are experimented in mechanical properties, sensitivities, stability. The micro-structure of the pillar...

Tool wear is a key issue for the friction stir welding (FSW) of aluminum matrix composites (AMCs), especially when the volume fraction of reinforcing particulates is relatively high. In this study, a tapered smooth tool of W6Mo5Cr4V2 high speed steel is used to weld a cast AMC composed of AA6061 matrix...

In this study, thermal property of the carbon nanotube (CNT) fibers from chemical vapor deposition synthesis was investigated. Thermal conductivity of the CNT fibers was measured using the “T”-type method; a value of 75.9 WK 1m 1was obtained at room temperature. Temperature dependence of the thermal...

The damage variables were defined by the microstructure of rod-shaped eutectic with parallel nano-micron fibers. The maximum strain criterion was used for determining the loading function. According to the attenuation characteristic of eutectic rigidity, the critical fracture stress of the damage rod-shaped...

Carbon nanotubes reinforced Al2O3/TiC composites were prepared by hot-pressed sintering in vacuum. The preparation technology and mechanical properties of Al2O3/TiC/CNTs composites were investigated. The results show that the phases of the composites are Al2O3, TiC and carbon nanotubes. The mechanical...

In this study, we have fabricated porous WO3 beads by microfluidic device. The polystyrene(PS) nanosphere arrays were filled by WO3 to prepare porous beads by using a template method. At the same time, in this paper, the raw materials used in this experiment is tungsten oxide which has the photoelectrochromic...

The effect of molybdenum (Mo) on the microstructure and thermal expansion of heat-resistant ductile iron having ferrite matrix was investigated. Microstructure of heat-resistant ferritic ductile iron consists of ferrite, eutectic carbide at eutectic cell boundaries, precipitated carbide in grain and...

The corrosion behaviors of AZ81 magnesium alloy with minor Gd addition have been researched in this paper. The results show that with the minor addition of 0.5-1% Gd, the microstructure of AZ81 magnesium alloy is obviously refined, and the spotted, high-melting point phase Al-Gd intermetallic compounds...

The microstructure and mechanical properties of AZ81 magnesium alloy have been studied by micro-analysis and tensile tests. The results showed that the alloy mainly consists of -Mg matrix, Mg17Al12. The tensile strength of AZ81 magnesium alloy is measured, The best tensile strength is 258MPa at 20 .

The microstructure and aging precipitated phases of Mg-12Gd-2Y-1Sm-0.5Zr alloy have been studied by micro-analysis XRD and EDS. Through the analysis it is found that the precipitated phases in the alloy contains Mg24Y5, Mg5Gd and Mg41Sm5. The tensile strength peak of Mg-12Gd-2Y-1Sm-0.5Zr alloy appears...

This paper expounds the characteristics of Gd and Mg-Gd binary alloys, Introduces the mechanism of Gd addition on the heat resistant magnesium alloys. Reviewed the research progress in magnesium alloys containing Gd on mechanical properties at room temperature and high temperature, and prospected their...

Cold spray in used to form Al coating on AZ31 magnesium alloy. Several parameters, such as spraying distance, gas temperature, and gas pressure are selected as the main processing parameters for cold spray. According to orthogonal design, orthogonal experiments are designed for the optimization of processing...

In order to improve the working performance of axial flow roller of harvester, light weight design of an axial flow roller was conducted based on sensitivity analysis. Under the CAD/CAE integrated design platforms, the statics finite analysis and sensitivity analysis of the axial flow roller were executed...

The microstructures and mechanical properties of Mg-Gd-Y-Sr-Zr alloy was investigated by means of optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and tensile tests. The as-cast alloy contains a microstructure consisting of -Mg matrix, Mg5Gd phase, Mg24Y5 phase and Mg17Sr2....

The higher order crack tip fields for anti-plane crack in functionally graded piezoelectric materials(FGPMs) under mechanical and electrical loadings are investigated. Although the elastic stiffness, piezoelectric parameter, and dielectric permittivity of FGPMs are assumed to be exponential functions...

The eigen-solutions of the crack tip fields for an anti-plane crack in functionally graded piezoelectric materials (FGPMs) are studied. Different from previous analyses, all material properties of the FGPM are assumed to be power-law function of y perpendicular to the crack. The crack surfaces are electrically...

The macro-deformation of crystal attributes the micro-slip in crystal of -TiAl alloy. So it is important to reveal the relation between macro-deformation and micro-slip of dislocation. In order to illustrate this relationship, the geometry relation between macro-deformation and dislocation density/external...

The thermal shroud has the structure of stainless steel pipe welding with copper fins. It has well capability of heat exchange, structural strength and inflexibility which is used to many types of equipment for space environment simulation in recent years. This article will conduct technology research...

To study the effects of PCVD combined nitriding coating processing on cutting performance of high speed steel tool, the PCVD was performed on W6Mo5Cr4VZ (MZ) steel tools to get surface strengthening, tool surface micro-hardness before and after PCVD process was studied, wear property and bonding force...

There was a great attraction to apply magnesium alloy as a biomedical material due to its biodegradable feature and suitable mechanical properties. In order to further improve the wear resistance performance of magnesium alloy, a micro-arc oxidation (MAO) coating containing MgSiO3 was generated on the...

A simple and effective method has been used to prepare graphene oxide and/or partially reduced graphene oxide–polypyrrole (GO/Ppy and PRGO/Ppy) composite with sandwich structures by using the soft template method. In the case of GO/Ppy8, a high specific capacitance of 456 F/g at a current density of...

By means of optical micrograph(OM), X-ray diffraction (XRD), scanning electron micrograph(SEM) and Energy Dispersive Spectrometer(EDS) analysis, the microstructure and phase compositions of Mg-3.7Zn-0.6RE alloys with different cooling speed were studied. All alloys had dendritic structure, the grain...

Texture evolution in Fe81Ga19 thin sheets produced by specially designed rolling and annealing process was examined using X-ray diffraction analysis. Cold rolled sheet is characterized by strong fiber (//ND) , fiber (//RD) and widely distributed shear bands through the thickness. A strong fiber (//RD)...

Compressive property of lattice material with pyramidal truss core was investigated under uniform quasi-static compression. Load–displacement response and shape deformations of trusses during compressive loading was simulated by finite element method. The numerical prediction is in good agreement with...

The microstructure evolution of ferrite in a low carbon steel during hot uniaxial compression tests at 700C and 0.01s-1 was investigated by means of OM, SEM, EBSD and TEM. In order to investigate the effect of cementite particles size on dynamic recrystallization (DRX) of ferrite, two kinds of different...

Different sizes and shapes of BaSiF6 were synthesized by a low temperature hydrothermal method using citric acid (CA) as a chelating agent and cetyltrimethylammonium bromide (CTAB) as a surfactant. The sizes and morphologies of the BaSiF6 could be altered by controlled the molar radio of CA to Ba2+....

The dispersed MWCNT was introduced into self-crosslinking HXNBR latex to get the compounded latex film. Mechanical, electrical and thermal properties of this composite were investigated in this article. Volume resistivity decreased significantly with the increase of the MWCNT loading. When the content...