Materials Literature
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An asymptotic solution is found by the method of inner and outer approximations for the singularly perturbed equations governing the deformation of twines and fibres that are under tension where the angles at the boundaries are fixed. This solutions is shown to be accurate to O(∊2 ) where ∊2 = EI/l 2 f, EI is the bend…
Currently there are no models to predict the thickness or the bondline thickness (BLT) of particle laden polymeric thermal interface materials (TIM) for parameters such as particle volume fraction and pressure. TIMs are used to reduce the thermal resistance. Typically this is achieved by increasing the thermal conduct…
Abstract New polyurethane materials were obtained after chemical modification of a commercial thermoplastic polyurethane (TPU) using diisocyanates and diols or diamines. The reaction can be easily processed by the well‐known calendering technique often used by the rubber industry. It leads to a remarkable improvement…
This report details studies conducted by Transportation Technology Center, Inc. (TTCI), a subsidiary of the Association of American Railroads (AAR), to determine the causes and behavior of shattered rim defects in wheels. Shattered rim defects are the result of large fatigue cracks that propagate roughly parallel to t…
Este trabalho avaliou as potencialidades de emprego do resíduo caulinítico das indústrias de beneficiamento do caulim como matériaprima na produção de uma metacaulinita altamente reativa. As características mineralógicas do resíduo e da metacaulinita foram analisadas pela difratometria de raios X e pela análise térmic…
The seminal investigation of the explosive fragmentation of steel cylindrical shells by N. F. Mott in the early 1940’s led to an elegant statistics‐based theory of dynamic fragmentation (Mott, 1947). Experiments in which rapidly expanded metal rings undergo dynamic fragmentation provide ideal data for testing the frag…
Contributors. Acknowledgments. Preface. Glossary. Compound Characterization. Thermodynamics. Kinetics. Equilibrium Constants. Partition Coefficient. Solubility. Aqueous Solubility of Weak Acids and Bases. Solution Stability. Instrumentation. Equilibria: Experimental Procedures and Examples. Partitioning: Experimental…
The main focus of this paper is the description of the competition between the silica-to-rubber coupling and the matrix crosslinking for the added free sulfur during vulcanization. Therefore two statistical design experiments with a variation of the amount of the sulfur - functional silanes Si 69, respectively Si 266,…
Functions of the compound additives in setting liquid were investigated and the water proof mechanism was analysed in detail. The experimental results show that the addition of silicasol and cellulose in setting liquid can improve water proof properties of MPC in SBF(Simulate Body Fluid). Compared with cellulose, the…
Two kinds of CaO clinkers, with 70% (low) density and 95% (high) density, were prepared and treated at 500-800°C in a carbon dioxide atmosphere. The low-density clinker was carbonated both on the exterior surface and inside the pores, with each CaO grain being encompassed by a layer of CaCO3 film; whereas the high-den…
Effects of Fe (III) ions on corrosion of stainless steel were examined in highly concentrated HNO3 solutions at high temperature, using mass loss measurements, electrochemical measurements, and quantitative analysis of NOx evolved during immersion.Addition of Fe(NO3)3 into HNO3 caused the corrosion potential of stainl…
A systematic study on martensitic transformation in Ti-rich Ti–Pd alloys has been carried out using differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). The alloys quenched from the single region of B2 parent phase show a successive transformation during DSC measurement. On the other han…
Laundering is required for many textile products, but it degrades the fabric performance. We have quantitatively investigated the relationship between the number of laundering cycles and several key fabric performance parameters. The effects of crease resistant treatment are also examined.As expected, increased launde…
Hydrogen behavior in V–Zr–Ni–Ti alloys with different amount of Laves phase has been examined by the tritium radioluminography and the PCT measurement. Tritium radioluminography has shown that the local hydrogen concentration in the Laves phase is higher than that in the BCC phase in the range of lower hydrogen conten…
Mesoporous phenyl-modified silica has been prepared by a co-condensation method and has been characterised via infrared and nuclear magnetic resonance (29Si, 13C) spectroscopies and thermal analysis (TG/DTA). Incoherent inelastic neutron scattering (IINS) at T = 10 K has been used to record vibrational spectra dominat…
Enhanced electron field emission from hydrogen-free amorphous carbon (a-C) films deposited on ZnO-tip-array-coated Si substrates was studied. Both the ZnO tip array and the a-C films were deposited by filtered arc deposition. Compared with the a-C film deposited on Si substrates, the a-C film on ZnO had a lower thresh…
The double perovskites AA' MnWO 6 (AA' = Ba 2 , SrBa, Sr 2 , SrCa and Ca 2 ) have been prepared as pure powders by a conventional solid-state reaction process. Stoichiometric amounts of BaCO 3 , SrCO 3 , CaCO 3 , MnO and WO 3 were mixed, ground and calcined in a nitrogen atmosphere. The materials have been studied by…
Polymer composites filled with calcium carbonate (CaCO3) nanofillers (<100 nm), and kaolin filler of layered structure, both well suited to create nanocomposites, were analysed. The aim of this study was to investigate the influence of surface properties of the filler and matrix on the adhesion parameters at the inter…
In this study, an AB 5 -type hydrogen-absorbing alloy, Mm ( Ni 0.71 Co 0.14 Al 0.08 Mn 0.06 ) 5.02 , was used as the negative electrode material. The metal-hydride (MH) electrode was charge/discharged over 200 cycles. The discharge capacity of the alloy was 250 mAh g −1 . The specific discharge capacity as a function…
Lead Zirconate Titanate (PZT) ceramic powders with morphotropic phase boundary composition were processed following the reactive calcination method from zirconium titanate and PbO. The powders so obtained have different porosity distribution with an average particle size of ∼0.3 w m. The porosity distribution of the p…