6significance of the alloys dealt with in this research work
metal and alloy bonding an experimental analysis ; charge density in metals and alloys
Ngày tải lên :
30/05/2014, 00:31
... The use of high-strength aluminium alloys in automotive and aircraft industries allows reducing significantly the weight of the engineering constructions In these fields, very often the main requirements ... non-uniform heat transfer during the mechanically induced deformation of the milled powders During this stage of milling, the atomic level strain increases as a result of increasing the dislocation density ... Diffraction The size of the grains in a polycrystalline material has more effect on the properties of the material, for example, the hardness of a metal or alloy increases with decrease in the grain size...
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Báo cáo hóa học: "Cobalt and Nickel Nanopillars on Aluminium Substrates by Direct Current Electrodeposition Process" pdf
Ngày tải lên :
21/06/2014, 20:20
... galvanostatic regime in the same electrolyte In this way, the aluminium oxide barrier layer of the pore bottom tips of the NAAMs was penetrated In this step, the previous value of the current density ... was penetrated without the NAAM detachment from the aluminium substrate Finally, since the aluminium oxide barrier layer is not uniform in the whole aluminium-alumina interface; the electrolyte ... to different stages of the growth of nanopillars in the pores This process starts using as template an NAAM with opened pores at the aluminium–alumina interface (Fig 3a) In the first section, metal...
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The effects of clay a m e n d m e n t and composting on metal speciation in digested sludge liang qiao
Ngày tải lên :
23/09/2012, 14:47
... agrees with the finding for red mud MSW compost (Hofstede, 1994) The leachable Cu increased during the composting process following the thermophilic stage and was likely due to the release of the ... is consistent with the finding of Wong (1995) and Hofstede (1994) Although the leachable Cu increased with the composting process, the magnitude of leachable Cu in sludge compost without red mud ... effect of red mud in the initial sludge mixture and into oxides bound Ni with composting The composting process humified the organic matter in the sludge releasing Ni from the bound sites on the...
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Tài liệu Báo cáo khoa học: Neuronal growth-inhibitory factor (metallothionein-3): reactivity and structure of metal–thiolate clusters* doc
Ngày tải lên :
16/02/2014, 15:20
... why the determination of the spatial structure of the N-terminal domain containing the Cd(II)3-CysS9 cluster was thus precluded For a more detailed discussion of the dynamics of the protein structure ... [isolated, incubated or generated upon Cu(II) binding] in air However, this does not explain why the disulfide bridge is formed in the a-domain (instead of the b-domain) upon oxidation of freshly ... not reported) Binding of either additional ion disturbs the CD signatures of the thiolate clusters, indicating interference with the cluster structure Moreover, a decrease in the Stokes radius...
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ADSORPTION OF pb AND cd ONTO METAL OXIDES
Ngày tải lên :
15/03/2014, 23:12
... characteristics of the remaining organic material There was also evidence that the acetic acid increased the organic content (COD) of the extracted bio®lms The added COD was likely the result of acetate binding ... expressed per unit nominal surface area of the glass slides containing the bio®lm, not the total surface area of the adsorbing phase The nonlinear regression was performed using SAS software (SAS Version ... component was estimated with non-linear regression analyses of all of the isotherm data including unaltered bio®lms and bio®lms after each of the three extractions The model used for the regression analysis...
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Báo cáo hóa học: " Synthesis and Characterization of Metal Nanoparticle Embedded Conducting Polymer–Polyoxometalate Composites" doc
Ngày tải lên :
22/06/2014, 06:20
... while retaining structural integrity [24] The introduction of polyoxometalates into conducting polymer network can be conveniently accomplished by taking advantage of the doping process of polymer ... present work, the formation of reduced PMo12 was observed during the polymerization of aniline in the presence of PMo12 The reduced PMo12 species served as reducing agent for the reduction of metal ... stabilizing agents for the formation of metal nanoparticles Recently, Mandal et al developed the synthesis of Au–Pd core shell nanoparticles using redox switching ability of Keggin ions [37] In the...
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Design, synthesis and applications of Metal Organic Frameworks
Ngày tải lên :
02/07/2014, 12:59
... Schematic show of synthesis of Cu MOF-4 Synthesis of Cu MOF-5 Cu MOF-5 was synthesized using the procedure described in synthesizing Cu MOF-4 as shown in figure 25 Cu MOF-5 was found in the solution ... benzene-1,4-dicarboxylic acid linkers (top inset box) coordinated to zinc ion cluster joints (shown in blue in the bottom inset box) Tunability of the IRMOF framework One of the principle advantages of MOFs over zeolites ... Adamentine view of a single fold of framework of Cd MOF-2, which hides the other frameworks interpenetrate with this frame 46 Figure 35 The 4-fold interpenetration view of Cd MOF-1,...
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terrestrial biotic ligand model (tblm) for copper, and nickel toxicities to plants, invertebrates, and microbes in soils
Ngày tải lên :
13/11/2014, 11:21
... activities of (a) Cu2+ and (b) Ni2+ for the various endpoints in the solutions of the of calcareous soils The solid line represents the 1:1 ratio and the dotted lines are a factor of above and below the ... their interaction with the BL sites associated with the six endpoints In addition to the protons, the major cations Ca2+ and/or Mg2+ also compete with Ni2+ ions in these endpoints These competing ... summary of all the major findings is given along with the scope and the limitation of the current TBLM The suggestions and the recommendations are also made for future refinement and extension of the...
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DESIGN, SYNTHESIS AND PROPERTIES OF METAL COMPLEXES AND COORDINATION POLYMERS FOR 2+2 PHOTO CYCLOADDITION REACTIONS
Ngày tải lên :
09/09/2015, 11:15
... combination of all these studies and observations, Desiraju defined crystal engineering in 1989 as the understanding of intermolecular interactions in the context of designing new solids with desired ... leads in the formation of 1D chain, and the bpe molecules are interestingly coordinated from only one N and the other side is Hbonded to the aqua ligands in the neighboring chain Similarly, the ... proposed the ‘Lock and Key’ model to explain the selective binding of substrates by enzymes This hypothesis also indicated the potential character of non-covalent interactions.[6] Later in 1930, Linus...
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Computational study of adsorption and diffusion in metal organic frameworks
Ngày tải lên :
14/09/2015, 08:49
... illustrates the recent dramatic increase in the number of reports, while the inset shows the natural log of the number of structures as a function of time, indicating the extraordinarily short doubling ... 2006 The bar graph illustrates the recent dramatic increase in the number of reports, while the inset shows the natural log of the number of structures as a function of time, indicating the extraordinarily ... smaller than the cavities they connect resulting in the kinetic tapping of H2 gas by windows Covalent Organic Frameworks A major breakthrough in the development of MOFs is the evolution of covalentorganic...
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Fabrication, characterization and application of metal tetraaminophthalocyanine polymer nanostructures
Ngày tải lên :
14/09/2015, 14:08
... and Q bands This implies the existence of a strong intermolecular interaction between adjacent Pc rings in the polymeric state which results in a relative increase in the intensity of the Soret ... changes in the staking structure upon the treatment These results provide evidence of the possibility of utilizing MTAPcs as the active material in the fabrication of sensors towards a series of oxidizing ... not include any investigation into the sensing abilities of these materials Insufficient attention has so far been given to research in the field of CP nanostructures, especially those involving...
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ALUMINIUM ALLOYS NEW TRENDS IN FABRICATION AND APPLICATIONS_2 pptx
Ngày tải lên :
05/03/2014, 21:21
... important Therefore, the ends of the parts were cleaned with acetone prior to the welding process to minimize the effect of organic contamination in the welding zone However, the aim of this study ... One of the best solutions to the problem of the accumulation of waste is recycling In this way, considerably decreases the amount of debris without polluting the environment Alu minium recycling ... reproduction in any medium, provided the original work is properly cited 302 Aluminium Alloys this kind of scrap often occurs, so the elaboration of alloys is based on smelting and refining special...
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ALUMINIUM ALLOYS NEW TRENDS IN FABRICATION AND APPLICATIONS_1 potx
Ngày tải lên :
05/03/2014, 21:21
... in the creep properties This soften‐ ing may be related to the decrease of the spacing of HAGBs at approximately constant sub‐ grain size with increasing number of ECAP passes, resulting in the ... for determinations of the grain sizes produced by ECAP and the nature of any dislocation interactions occurring within grains The application of modern imaging methods to the examination of microstructures ... all the researchers would find this book of great interest and severe topic would stimulate them in undertaking further research in areas of interest VIII Preface The spirit of my deceased father...
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the welding of aluminium and its alloys
Ngày tải lên :
12/03/2014, 17:32
... increase in the other dimension(s) This produces an elongation of the grains of the metal in the direction of working to give a preferred grain orientation and a high level of internal stress The increase ... lap joints, edge to edge butt joints Introduction to the welding of aluminium of a filler metal which is introduced in the form of a wire or rod and melted into the joint Together with the melted ... Increasing the arc current increases the temperature of the weld pool and thereby increases the rate of absorption of hydrogen in the molten metal Conversely, in the flat welding position increasing the...
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Báo cáo hóa học: " Comparison of nickel silicide and aluminium ohmic contact metallizations for low-temperature quantum transport measurements" docx
Ngày tải lên :
20/06/2014, 22:20
... results from the formation of the BCS energy gap in the superconducting aluminium contacts The critical field BC = 10.5 mT for aluminium is shown, which coincides with the destruction of the resistance ... fitting to the underlying weak localization peak This magnetic field range is consistent with the critical field BC for aluminium [7], confirming that the origin of the peak is related to the BCS ... is dominated by Nyquist dephasing, resulting in a T -0.5 dependence, shown in 3a In this regime the mobility is dominated by weak localization and electron-electron interactions, resulting in a...
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RECENT TRENDS IN PROCESSING AND DEGRADATION OF ALUMINIUM ALLOYS_1 docx
Ngày tải lên :
29/06/2014, 08:20
... positioned in the moulding flask The sprue, with a conical-shaped intersection point with the rest of the mould, pokes through and sits in the conical depression of the lock-nut The “square” fit of the ... space of the moulding flask, making it an extension of the moulding flask and enabling its evacuation along with the rest of the flask The flask lid hosts the casting valve, a connecting hose to the ... up-flow into the mould During countergravity casting, the moulding flask with the mould assembly inside, is placed on the furnace lid with the down-sprue poking through a hole in the furnace lid The...
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RECENT TRENDS IN PROCESSING AND DEGRADATION OF ALUMINIUM ALLOYS_2 docx
Ngày tải lên :
29/06/2014, 08:20
... understanding of the properties of the intermetallic particles themselves and 224 Recent Trends in Processing and Degradation of Aluminium Alloys their roles in corrosion of alloys The physico-chemical ... that the AE activity in Ti was bound with twinning from the beginning, while in Ti alloys the AE impulses from twinning appeared after a high degree of deformation During compression of the γ-TiAl ... applying these coatings relies on metal finishing treatments (treatment prior to painting involving immersion in acidic and alkaline baths)) with the objective of reducing the heterogeneous nature of...
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ALUMINIUM ALLOYS, THEORY AND APPLICATIONS_2 pdf
Ngày tải lên :
29/06/2014, 14:20
... progressively in the alloy during the asymmetrical uniaxial cyclic stressing at room temperature and 150˚C The ratchetting strain increases with the increasing number of cycles, but the ratchetting strain ... Ratchetting of 6061-T6 Aluminium Alloy 213 considering the interaction of ratchetting and fatigue damage will be discussed in the future work for 6061-T6 aluminium alloy in the framework of finite ... alloy fails within fewer cycles, even if the magnitude of final ratchetting strain at lower stress rate is lower In the stress cycling with the Type II loading 206 Aluminium Alloys, Theory and...
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ALUMINIUM ALLOYS, THEORY AND APPLICATIONS_1 ppsx
Ngày tải lên :
29/06/2014, 14:20
... curve of linear strengthening σ - φ curve of nonlinear strengthening 0 Type of σ-ε curve with linear strengthening Fig 13 Dependence of index of outer corner shapes on the type of strengthening ... of net deformation in software DEFORM 2D are shown in Fig 4c The intensity of plastic deformation is depended on angle of shearing strain γ With increased of shearing strain angle is increasing ... markings on aluminium and aluminium alloys and information about machining and machinability of aluminium alloys Out of all, aluminium alloys offer opportunities in a wide range of applications The...
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Tài liệu Nickel and ITS Alloys ppt
Ngày tải lên :
26/12/2013, 01:18
... from the joint on both sides of the material This prevents embrittlement by alloying of corrosion products during the welding process Cleaning can be done mechanically by grinding with a fine ... Waspaloy Inco family of companies Haynes International, Inc Inco family of companies Inco family of companies Martin Marietta Corp Inco family of companies Inco family of companies Inco family of companies ... potentials in flowing seawater (8-13 ft/sec), temperature range 50-8O0F Alloys are listed in the order of the potential they exhibit in flowing seawater Certain alloys, indicated by solid boxes, in low...
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