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Facile Synthesis of TiO2 Hollow Spheres with Enhanced Photocatalytic Activity Yu-zhen Lv1, a, Wei Wang1, Sheng-nan Zhang1, You Zhou2 and Cheng-rong Li2,b 1 School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China 2 State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of High Voltage & EMC, North China Electric Power University, Beijing 102206, China ayzlv@ncepu.edu.cn; blcr@ncepu.edu.cn Keywords: TiO2 hollow spheres, hydrothermal method, self-assembly nanorods, photocatalytic activity, Abstract.
In addition, the presence of self-assembled nanorods is also a positive factor affecting the photocatalytic activity.
Li, Photoelectrochemical study on charge transfer properties of TiO2-B nanowires with an application as humidity sensors, J.

Simulations on Heat Exchangers in Thermoelectric Generators for Automotive Application Tan Nguyen Tien1,2,a, Hieu Minh Dong1,b, Dien Vu Minh3,c, Quang Khong Vu1,d*, Nguyen Huu Phu4,e and Vinh Nguyen Duy5,f* 1Department of Vehicle and Energy Conversion Engineering, School of mechanical engineering, Hanoi University of Science and Technology, Vietnam 2Department of Student Affairs, Hanoi University of Industry, Vietnam 3Center for Automotive Technology and Driving Training, Hanoi University of Industry, Vietnam 4Faculty of Automotive Technology, Hanoi Vocational College of High Technology 5Faculty of Vehicle and Energy Engineering, Phenikaa University, Vietnam atannt_dtn@haui.edu.vn, bHieu.dm185790@sis.hust.edu.vn, cdienvuauto@gmail.com, dQuang.khongvu@hust.edu.vn, ephunh@hht.edu.vn, fVinh.nguyenduy@phenikaa-uni.edu.vn Keywords: Thermal electric generator, engine efficiency, counter-current, crossflow, heat transfer Abstract.
Some assumptions are used for the simulation process: fluid having consistent thermal characteristics that is incompressible and viscous; no external work; negligible potential energy and kinetic energy; no phase changes; uniform fluid properties.
(2) where U is the surface area across which heat transfer occurs, F is the correction factor accounting for the crossflow effect, and ΔTLM is the logarithmic mean temperature difference between the two fluids.
If increasing the number of compartments is, the angle of each compartment will be minimal, affecting the movement of exhaust gas.

The tailored blanks are hereby analyzed by their geometrical dimensions, like sheet thickness, and their mechanical properties, e.g. hardness distribution.
The mild deep-drawing steel DC04 and the high-strength steel DP600 with the mechanical properties determined in a tensile test and depicted in Figure 3 are used.
In addition to the geometric properties, the Vickers hardness was measured using the Fischerscope HM2000 system.
This difference can be explained by the material properties of the DP600.
In addition to the geometric dimensions of the manufactured tailored blanks the mechanical properties, like the hardness, are another field of interest for the evaluation of the tailored blanks.

The difficulty of these constructive components lies in the fact that, the ceramic components must be attached to metal components will join vacuum chambers that make up the ring, and then must present excellent mechanical and vacuum tight.
The objective of this paper is to describe the process of film deposition and brazing of copper and the excellent results obtained in the production, mechanical characterization, microstructural and tightness.
Despite the high reliability and beam stability, the current source has several limiting factors that prevent its use in a large number of applications of extreme importance for future developments in science and technology.
This phenomenon did not affect the adhesion of the second layer electrodeposited.
Bagnato: Effect of Heat Treatment on Microstructure and Mechanical Property of Diamonds Substrates Brazed with Active Filler Metal.

In this case, at least two additional factors must be taken into account.
AS12 AS13 AS17 The principal requirement for a good reproducibility of mechanical properties of casting alloys, in particular in fatigue, is the lack of solidification defects and the constant scale of microstructure homogeneity.
Tensile Properties The tensile properties of all investigated alloys are listed in Table 2.
Tensile properties of model Al-Si alloys.
Summary - Microstructural Factors in Fatigue Model Al-Si Alloys.

Introduction Fiber composites have high specific mechanical properties; this feature is mainly due to the synergy between the fiber and the polymer matrix.
However, these mechanical properties can be significantly reduced after impact.
Yet, increasing the pick density, was the only significant factor in the X-direction.
In-plane and through-thickness properties, failure modes, damage and delamination in 3D woven carbon fibre composites subjected to impact loading.
Low velocity impact properties of 3D woven basalt/aramid hybrid composites.

Machinery and Electronics Engineering, Shantou University, Shantou 515063, China, 3.College of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou 510006,China; aHechanglin2318@126.com, bgong.zhang@giat.ac.cn Key word: laser cladding; Ni-based titanium carbide; Process Parameters Abstract: This paper gets a further study to cladding of Ni-based Titanium Carbide in the surface of die steel of 718, This paper introduces the effect of laser process parameters on the titanium carbide and nickel solid solution and cemented carbide in cladding layer; on that basis, this paper studied the effect of the different of powder paving thickness, laser power and scanning velocity and other parameters on microstructure and properties of cladding layer.
It can be combined the metal materials's high strength, toughness and good processing property with the ceramic material's excellent wear and corrosion resistance, and chemical stability, it could greatly improve the service life of parts.
For a historical review of these and other areas of biomedical telemetry please refer to the surveys by Gong Liu and Li[1], Vuoristo and Vihinen[2], Bachmann and Industrial[3], Lin[4].Nickel-base alloy powder has excellent comprehensive performance of wear and corrosion resistance, heat resistance and other excellent properties, and it could be widely used as the surface hardening material[5].This paper studied effects of different process parameters such as laser power, scanning speed, powder-bed depth on the microstructure of cladding layer. 2.
THE RESULTS OF EXPERIMENT 3.1 EFFECT OF LASER POWER ON THE MICROSTRUCTURE AND PROOERTIES OF CLADDING LAYER The laser power was the most important process parameters in laser cladding, The laser power could also affect the dilution rate of TiC and carbide hard phase in cladding layer, higher laser power would significantly increase the dilution of carbide hard phase in cladding layer, which influences the performance of cladding layer. 3.1.1 INFLUENCE OF LASER POWER ON THE CLADING LAYER OF TITANIUM CARBIDE’S DISSOLUTION AND PRECIPITATION Dissolution and precipitation behavior of titanium carbide in cladding layer was directly linked to the pores and cracks in the laser cladding layer.
With comprehensive consideration of various factors, when the powder layer thickness is 0.5mm, power is 300W to 350W, scanning speed of 15mm/s can be the best technology parameters，and it we can get the cladding layer without pores and cracks, and its dilution rate was low. 5.

Industrial manufacturing and processing of GH80A components is most frequently carried out by deformation at high temperature, the dynamic recrystallization (DRX) behavior of workpiece during hot deformation affects the macroscopic characteristics, which determines the final mechanical properties of the product.
Consequently, as a temperature compensated strain rate factor, The Zener-Hollomon parameter is introduced to characterize the combined effect of strain rate and temperature on the deformation process [8]: (1) where Q is the activation energy of DRX (KJ/mol), is strain rate, T is absolute temperature and R is the universal gas constant.

The mechanical properties of Al-Si alloys can be controlled by small addition of Mg or Cu and then strengthened by a precipitation hardening treatment that forms Mg2Si or Al2Cu phases.
Surface inspection of failed specimens and comparison with test results from the literature [3,4] allowed concluding that shrinkage porosity was the dominating factor controlling the fatigue performance of the present AlSi7Mg alloys produced with the sand cast process.
Pore size characterization Pores affect directly the fatigue life because they act as stress concentrators: Fig. 2 shows the elastic stress distribution around natural shrinkage porosity.

Pumping Characteristics of Calcium Carbide Waste Paste Xuedi Hao1, a, Changyong Gong2 , Jichang Guo1 , Huaxu Yang1 , Miao Wu1,b 1 School of Mechanical Electronic & Information, China University of Mining & Technology (Beijing), Beijing 100083, China 2 China Center for Industrial Economic Security Research in Beijing Jiaotong University, Beijing 100044, China ahxd2003@126.com, bwum@cumtb.edu.cn Keywords: calcium carbide waste, pastes, pipeline transportation, solid pump Abstract.
In addition to the arrangement of piping results in the larger delivery resistance in the front end of the pipeline, the flow characteristics of calcium carbide paste is a main factor for it.
(3) Pipe diameter affects the delivery resistance greatly, when the diameter decreases, the resistance increases rapidly.
Study on rheological properties and frictional resistance of pipeline transport high concentration and viscous materials [D].