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Online since: May 2006
Authors: Jacek Chmielowiec, Agnieszka Halama, Grzegorz Paściak, Piotr Bujlo
Physical and electrochemical properties of that membranes were investigated.
In the development of new membranes, functionalisation of a preformed polymer material offers many advantages, in particular with respect to the mechanical properties of the matrix material.
Mechanical properties were measured with a testing machine INSTRON 6025/5500E, using a programmed elongation rate of 2 mm/min (22 ºC, 40 % RH).
Mechanical strength of membranes Mechanical strength of membrane affects manufacturing conditions of MEA and durability of it in the PEMFC.
Mechanical properties of PVDF-based membranes with different d.o.g. prepared by impregnation method - Method II.
Online since: August 2014
Authors: Aleš Dittrich, Pavel Brabec
Much of the final form of this component also contributes its load, which is both heat and mechanical.
These temperatures are influenced by many factors, especially temperature and coolant flow, load and engine speed, which affect the combustion process and exhaust gas temperature (the engine mode is constantly changing, therefore the thermal load on the valve seats is different).
Among the boundary conditions are, first, the parameters (properties) of used materials, but in particular the definition of heat transfer.
It is the mechanical and thermal stresses.
Calculated values of temperature distribution can be further used in the mechanical analysis (determination of strain and stress generated by the heat load).
Online since: January 2014
Authors: Na Zhao, Wen Chen, Tao Yan
Although the research and application of scaffold materials for tendon tissue engineering has achieved some success, but the application materials or the presence of biocompatibility, degradation problems or have poor mechanical properties, machining molding defects, there is still a big gap between the ideal scaffold materials.
The research shows that, polyethylene fiber polylactic acid composite material has good biological properties, can be used for clinical tendon repair.
The ankle in extreme dorsiflexion, Achilles tendon subjected to up to 6867 N force, so that movement in the special movement and stress is an important factor to the Achilles tendon rupture.
Although the research and application of scaffold materials for tendon tissue engineering has achieved some success, the application materials or the presence of biocompatibility, degradation, or the presence of poor mechanical properties, machining molding defects, but also there is a big gap with the ideal scaffold material.
The release of the 3D geometry and support tensile strength, support irregular for bioactive substance, are also important factors to be considered in the design of.
Online since: February 2006
Authors: Ai Bing Yu, A.J. Wang, C.G. Luan, S.F. Chen
Bonds of electroplated diamond tools are investigated through the studies of microstructures and properties.
Bond of electroplated diamond tool is an important factor to affect the machining behaviors of diamond tools.
Among three bonds, the bright nickel coating shows smallest grains and will have better mechanical properties.
Hardness is an important property of bond, and directly affects the wear-resistance of electroplated diamond tool.
Usually, coarse grains of bond will result in the lower mechanical properties.
Online since: October 2011
Authors: Zhi Fen Li, Tai Ling Ma
This paper analyzes Influence factors of handling techniques.
Influence factors of handling techniques Earthworm species.
The reason is that compared with quartz sand ceramsite developped microporous, a larger surface area, easy microbial adhesion and density which makes the filter bed with a high dissolved oxygen, high permeability and high steady state, thermal insulation properties and easy to clear and be more suitable for growth and reproduction of earthworms and microorganisms, thereby enhance the performance of the removal.
Hydraulic loading directly affects moisture content of filter materials through the action of hydraulic scour, thus affects the living environment of earthworms, furthermore affects the treatment efficiency of sewage.
The treatment technology has many influence factors, such as earthworm species, temperature, filtering media and hydraulic loading.
Online since: April 2023
Authors: Chang Ning LI, Shao Hua Yin
Gu Xiaolong et al. [21] further studied the effects of brazing temperature and holding time on the mechanical properties of Al2O3 ceramic and Kovar alloy brazed joints.
The results show that the main influencing factors are laser power.
The smaller the output power is, the lighter the interfacial reaction is, and the better the mechanical properties of the joint are.
Wang, Mechanical property of alumina ceramic/AgCuTi/Kovar alloy brazed joint, J.
YU, Microstructure and Mechanical Properties of Partial Transient Liquid Phase Bonded Si3N4-DZ483 SuperalloyJoints, J.
Online since: September 2013
Authors: Bi Ying Sha, Qing Shan Liu, Xiao Ying Yin, Ling Zhang
CS-graft-poly(methyl methacrylate) copolymer nanoparticles are new polymeric materials that possess both good mechanical and biocompatibility properties[9-11].
Factors and the corresponding levels Factors 1 2 3 Reaction time (h) A 1.5 2.0 2.5 Amount of chitosan (g) B 0.15 0.3 0.45 Amount of MMA(g) C 0.5 1.0 1.5 Volume of TBHP(mL) D 0.2 0.3 0.4 Table 2.
Conclusions By this method, we can obtain graft copolymerization nanoparticles with excellent chemical and physical properties .
Stimulus Properties of PMMA: Effect of Optical Isomers and Conformational Restriction[J].
Experimental study of tensile properties of PMMA at intermediate strain rate[J].
Online since: February 2020
Authors: Denis Veselov, Nikolay Samotaev, Konstantin Oblov, Anastasia Ivanova, Maya Etrekova, Anastasiya Gorshkova
.), In addition, platinum is weakly susceptible to oxidation in air, which makes it easier experiments on its adhesion to ceramics due to the absence of a chemical factor in the materials interaction.
Spraying through a mask imposes on the topology a number of restrictions on the pattern geometry due to the mechanical properties of the mask material itself.
Too long curves and voids lead to sagging of mask elements with their subsequent mechanical destruction.
(c) Metallization processing mode, leading to its detachment from the front side and not affecting the metallization from the reverse side.
The processing mode of metallization, leading to its detachment from the front side, presented in Figure 1c (T = 4ns, P = 0.04 W (0.2%), S = 600 mm/s, F = 50 kHz, 100 lines/mm), and not affecting the metallization on the reverse side, does not lead to evaporation of metallization along the vector contour.
Online since: March 2014
Authors: Viorel Aurel Şerban, Ion Dragos Uţu
To achieve the best functionality of the coatings one needs to know the relationships between the mechanisms of coating formation and its mechanical properties.
While the mechanisms of formation of such coatings have been rather well investigated, detailed information on mechanical properties still remains difficult to obtain because of the heterogeneity of the coating [1].
Fig. 1 SEM micrographs of the WC Co coating 2.2 Scratch test measurements The mechanical properties and especially adhesion of the coating to the substrate were evaluated by the scratch test using the tester Millenium 200.
The differences were explained by the volume of the material affected by the process of indentation.
Petit, Characterization of mechanical properties of suspension plasma sprayed TiO2 coatings using scratch test, Surface & Coatings Technology 202 (2008) 2644-2653
Online since: October 2013
Authors: Xiao Ke Li, Chang Yong Li, Wen Hui Song
Frost Resistance Mechanism Frost resistance of steel fiber reinforced lightweight aggregate concrete includes two key effect factors.
The level of various factors usually depends on the experience.
Yu, Factors affecting frost resistance of concrete and its prevention measures, Learned Journal of Taishan Township Enterprises University for Employees, 2 (2010) 47-48
Chen, Test of LC50 level high performance ceramic concrete mechanical properties and durability, in: Ninth National lightweight aggregate and lightweight aggregate concrete Symposium and the Third Cross-Strait lightweight aggregate concrete in the production and application technology seminar Proceedings, 2008, pp247-254
Zhu, Analysis of factors affecting on frost resistance of concrete, Technological Innovation Herald, 29 (2011)
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