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A Study on Erosion Performance of Monocrystalline Silicon in Ultrasonic Vibration-assisted Abrasive Water Jet Machining Zhongwei Zhanga, Hongtao Zhub, Chuanzhen Huangc, Jun Wangd, Peng Yaoe, ZengWen Liuf Center for Advanced Jet Engineering Technologies (CaJET), Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University, Jinan, China, 250061 a312977515@qq.com, bhtzhu@sdu.edu.cn, cchuanzhenh@sdu.edu.cn,djun.unsw@gmail.com, eyaopeng@sdu.edu.cn, fzw-liu@sdu.edu.cn Keywords: ultrasonic vibration, abrasive water jet, erosion performance, material removal rate Abstract.Ultrasonic vibration-assisted machining (UVAM) is an effective and promising technology for processing hard and brittle materials, it has been explored in many experimental and theoretical investigations.
Introduction Monocrystalline silicon which has metallic luster and semiconductor properties is hard and brittle material and is called as the cornerstone of microelectronic.
Fig.1 Schematic of ultrasonic vibration-assisted abrasive water jet machining system There are a lot of variables and virtually all these variables affect the erosion results.
The comparison analysis of the removal features of the pits in the UVA-AWJE and the traditional scratch reveals that the ultrasonic vibration assistance affects the material removal features of the monocrystal silicon.
By analyzing the orthogonal experiment, the abrasive particle diameter at the significance level of 0.05 is significant and the contribution rate of the abrasive particle diameter is the highest, the other factors are not obviously.

In the case of through-thickness texture variations, the orientation distribution of the crystallites may lead to non-uniform mechanical properties and also cause inhomogeneities in microstructure during subsequent material treatments (e.g. annealing).
Another way to consider the intensity corrections is to treat theoretically the measured data taking into account, beyond other factors, the hkl plane multiplicity, the polarization factor, the mass absorption, the geometric factor, the normalization factor, etc.
Bunge, Influence of texture on mechanical properties, on Microstructure and mechanical properties of materials, Edited by E.
Pyzalla, Microstructure and mechanical properties of magnesium alloy AZ31B laser beam welds, Materials Science and Engineering A 485, 20-30 (2008)
Pyzalla, Microstructure and mechanical properties of an AA6181-T4 aluminium alloy to HC340LA high strength steel friction stir overlap weld, Advanced Engineering Materials, 10, No.10, 961-972 (2008)

The fuel management in the components of a fusion reactor is influenced by the isotope effects in the diffusive transport properties of the gas within each material.
The type of microstructure (fcc or bcc) and the existence of lattice defects inducing the mechanism of H trapping have been identified as key factors influencing the isotopic relations.
The surface of the specimens was treated to eliminate any impurity that might affect the penetration of H into the bulk of the material.
They rejected the classical rate theory based on overbarrier jumping diffusion mechanism and proposed a modified version with a quantum-mechanical modification.
Moreover, it will be confronted below the difficulty to explain the particular behaviour of the lattice and, consequently, the inconvenience to introduce more factors of uncertainty reminiscent of the trapping phenomena.

The determination of electro kinetic properties and particle size of synthesized powders were made.
However, certain factors may upset the balance, with pathological formation of biogenic minerals in human tissues and organs being a possible consequence.
Results and Discussion The studies of physical and chemical properties of urinary stones are important to understand their formation.
Sample Ca P S Mg Cl Na K Zn Ca/P 1 58.19 36.43 0.79 0.52 0.07 2.99 0.46 - 1.60 2 58.01 36.68 0.78 0.73 0.14 2.85 0.32 - 1.58 3 57.04 37.13 0.63 0.63 0.29 3.12 0.38 0.28 1.54 Apatites, which comprise the mineral phase of biominerals, differ from pure hydroxyapatite in stoichiometry, composition and crystallinity, and other physical and mechanical properties.
Therefore, synthesize hydroxyapatites with different molar Ca/P ration and determination their properties can be necessary for understanding the causes and mechanisms of urolithiasis.

Introduction Water hazard disaster may cause the entire watershed pollution, which directly affects the water life and indirectly effects the residents living and industrial production, even cause casualties; water transportation accidents of dangerous goods inspection is an important link of the dangerous goods emergency and contingency planning , with advanced detection technology can rapidly acquire the carriage's substances, physical and chemical properties, provides decision-making information for emergency rescue which reduces the rescuers' injury, and prevent disaster from further extend [1].
Remote unmanned aircraft control gas sampling device comprises a remote control device and remote control handle [5], remote control device is also equipped with camera and steering gear, single chip computer and mechanical structure; the camera and the steering gear are connected with the single chip microcomputer; single chip computer and remote control device communication module are connected for receiving remote control handle orders and sending video information captureed by camera; and single chip computer is controedl by a relay mechanical structure.
Commuication modue Control module Acquisition pod Windlass Camera Fixed tank Fig3 Schematic diagram of gas sampling The mechanical structure including the acquisition of pod, a needle cylinder type gas collector, a winch and acquisition pod release device; a needle cylinder type gas collector is arranged in the collection within the pod, a needle cylinder type gas collector and top of the collection of pod connect with hoist hanging ; a needle cylinder type gas collecting device, a winch and acquisition pod release device are controled by the SCM through relays.
Aircraft lift coefficient CL=M×9.81/0.5ρV 2S, the minimum level flight power W=D×V, (D stands for resistance), D=W×CD/CL, CD is drag coefficient, power = W×CD/CL1.5×√W/0.5ρS, CL1.5/ CD is the power factor, well designed airfoil can bring high power factors, we can get these parameters through the wind tunnel tests as follows: 1 2 3 4 5 6 CL CD CL/CD CL3 CL1.5 CL1.5/ CD 0.4 0.0289 13.84 0.064 0.253 8.75 0.5 0.0241 20.75 0.125 0.353 14.66 0.6 0.0218 27.75 0.126 0.464 21.32 0.7 0.0220 31.82 0.343 0.585 26.53 0.8 0.0240 33.33 0.512 0.715 29.82 0.9 0.0260 34.62 0.729 0.854 32.85 Fig5 Part of the power factor data by wind tunnel experimental 2.3 Video capture control process After finding the situation, we can manually control wireless signal transmitter,.

Wind power generation is the process of wind wheel that catches the wind converting wind energy into mechanical energy, then converting mechanical energy into electric energy.
So airfoil composing of blade and its arrangement will directly affect the changing efficiency of wind.
(4) In the formulae: - lift coefficient; - drag coefficient; - axial interference factor; - week to the interference factor; - the number of blade; - the radius of wind wheel; -the twist angle
Parameters and property of these airfoils which are imported into AutoCAD are modified.
Numerical Analysis of Dynamic Property and Fatigue Life for HAWT GRP Rotor Blades, Porc.

Introduction As the Metal Oxide Semiconductor Field Effect Transistor (MOSFET) becomes smaller, the number of atoms in the silicon that produce many of the transistor’s properties is becoming fewer, with the result that control of dopant numbers and placement is more erratic [1].
Chemical Mechanical polishing was then applied to eliminate extra oxide on the wafers.
Among these control factors, Factor E was considered to interact with Factors A, B, C and D.
Therefore, these factors should be set at ‘best setting’ and can not be used as an adjustment factors.
Whereas factors D or E could be described as an adjustment factor because it has the large effect on mean and small effect on variance if compare with other factors.

Among these parameters, austenite chemical composition and the austenite grain size (AGS) are considered as the most important factors.
The other critical factors which influences the Ms temperature is the austenite grain size before the martensite transformation occurs.
However, in practice, in order to better the strengthening effects through grain refinement strengthening, precipitations strengthening and dislocation strengthening to improve the comprehensive mechanical properties of steel, the austenitizing temperature usually chosen below 1200°C.
The influence of grain boundaries on mechanical properties, Metall.
Zhang, Characterization of the microstructures and mechanical properties of 25CrMo48V martensitic steel tempered at different times, Mater.

From a numerical point of view, pounding has been traditionally studied by either one of two models, that are: a) stereo-mechanical, or b) force-based.
The impact force can be evaluated by the following expression: Fpt,δ=khd∙x1t-x2t-gpn+chdt∙x1t-x2t x1-x2-gp>0 x1-x2>0 (3) Fpt,δ=khd∙x1t-x2t-gpn x1-x2-gp>0 x1-x2≤0 Fpt,δ=0 x1-x2-gp≤0 where the Hertz coefficient is assumed equal to n=32; the stiffness coefficient khd depends on both mechanical and geometrical properties of the colliding bodies.
Since it was observed that earthquake direction can affect the maximum response [14], both forward and backward seismic attacks were considered.
As can be gathered, given a seismic zone, the displacement amplification increases for decreasing mechanical characteristics of the foundation soil.
Response amplification factor α12 of mass-1, defined as multiplication factor of the non-pounding response of mass-2 are plotted in Fig. 5 against period ratio t.

Then Huang analyzed the affection to the machine working properties caused by the randomicity of anti-resonance frequency and motor speed and the asymmetry of the spring[4].
But no researcher has been made some research on the anti-resonance vibration machine with nonlinear factor such as nonlinear spring or damper.
The dynamic amplification factor of upper and lower body can be defined as: Where and are the amplitude of x1 and x2 in the eq11.
(2)The dynamic parameters affect to the dynamic properties of the anti-resonance vibration machine are revealed.
Mechanical Industry Press : 2001