Materials Literature
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Se presenta una formulacin numrica basada en una combinacin de la mecnica de la fractura y de la mecnica del dao continuo para tratar el problema de la propagacin de una fisura en rgimen elstico, bajo el efecto de una accin mecnica definida por una carga esttica aplicada en el modo de fractura I y de una accin ambient…
Uncapped silver nanoparticles were synthesised using hitherto unexplored DC arc thermal plasma technique using Ar, He and mixture of Ar and He as plasma gases. Effect of change in plasma gases on the morphological properties of synthesised nanoparticles has been studied. XRD revealed formation of phase pure cubic silv…
A simple method was proposed to reduce the critical voltage of electrospinning and gain finer nanofiber. Beside the collector, a ground inducing plate was introduced into the electrospinning experiment setup, and the distance between spinneret and inducing plate can be adjusted. Under the same applied voltage, the ele…
In the framework of nuclear waste incineration and design of new generation nuclear reactors, experimental data on fission probabilities and on fission fragment yields of minor actinides are crucial to design prototypes. Transfer-induced fission has proven to be an efficient method to study fission probabilities of ac…
A transparent field emission device made from spray coating a single-wall carbon nanotube (SWNT) in -dimethylformamide (DMF) was developed. Highly crystalline SWNTs were successfully synthesized using a vapor phase method. Amorphous carbon and catalyst metal particles that remained in the SWNTs were removed using a pu…
In the present study we report the changes in the modified near-surface layer on NiTi shape memory alloy, caused by ion implantation as well as their influence on the structure and mechanical properties of this material. Experimental results of an inhomogeneous structure and tribological properties of implanted NiTi a…
Se evalu el efecto de la ultrafiltracin en el proceso de concentracin de gelatina comestible tipo B sobre el poder viscosante y gelificante del producto en polvo. Los resultados se compararon con los obtenidos por evaporacin. La gelatina se obtuvo de carnaza bovina entera (parte central de la dermis) y mezclas de sta…
Low-temperature emission of the singlet form of dioxygen 1 O 2 from the surface of the individual and mixed V and Mo oxides was detected by thermal desorption at 20–350°C. The amount of the desorbing 1 O 2 and the temperature range of 1 O 2 emission were found to depend on the composition of the catalyst; the low-temp…
Efficient oxonitridosilicate phosphors CaSi 2 O 2 N 2 : Eu for application in phosphor-converted light emitting diodes (LEDs) were synthesized from a ( Ca , Eu ) CO 3 @ SiO 2 core–shell template precursor using NH 3 gas as a reduction–nitridation agent. Scanning electron microscopy images show that the spherical shape…
Lithium nickelate and its lanthanum substituted compound have been successfully prepared by combustion synthesis process using LiNO 3 , Ni(NO 3 ) 2 .6H 2 O and La(NO 3 ) 3 .6H 2 O. Hexamine is used as fuel. The physicochemical properties of the powders were investigated by thermal analysis (TGA/DTA). The crystalline p…
The Cassie-Baxter state is a phenomenon in which a liquid rests on top of a textured surface with a gas layer trapped underneath the liquid layer. This gas layer introduces an effective shear free boundary that induces slip at the liquid-gas interface, allowing for friction reduction in liquid channel flows. Multiple…
The collagen coated nanoliposome (CCNL) have been prepared and characterized in order to develop a targeted and controlled drug delivery system. The zeta potential (ZP) measurement, Fourier transform infrared (FT‐IR) spectral and Scanning Electron Microscopy (SEM) and Cell viability assay data showed that the collagen…
We investigated the thermal characteristics of Cu/low-k interconnects to suppress the impact of Joule heating (JH) on electromigration. The thermal time constants in multilayered Cu/low-k interconnects were experimentally investigated for the first time on the basis of the transient thermal response. Furthermore, we a…
速度論に基づいた高pH溶液中へのCO2ガス溶解モデルを構築し，実験的・数値解析的な検証を行なった．アルカリとしてNaOHを用いた模擬細孔溶液，および固相物質としてCa(OH)2を加えた模擬細孔溶液中へのCO2の溶解に関して，構築した溶解速度モデルを適用して数値計算を行った結果，pH等の実験値の挙動を概ね再現することができた． 一方，気相に接する液相要素が瞬時にCO2の溶解平衡に達するとの仮定に基づいた平衡モデルと，溶解速度モデルとの数値計算結果の比較を行なった結果，気相のCO2濃度が低くなり実環境条件に近づくほど平衡モデルにおける仮定は成立しなくなり，実環境条件において CO2の溶解プロセスを律速しているのは拡散速度ではなく，溶解…
For the first time, we find that the dynamic antiferromagnetic phase present in CeFe2 gets stabilized with Ga and Si substitutions. We find that phenomena such as strain-induced first order jumps in the magnetization curves, asymmetry between the M-H curves during the increasing and decreasing field cycles, the envelo…
D.c. conductivity σ and thermal degradation measurements on PEDOT:PSS films of different thicknesses d = 50, 120 and 180 nm are reported. The experimental results are consistent with a hopping type carrier transport. For the films with thickness d = 50 nm, which consist of almost one single layer of PEDOT:PSS conducti…
Hydrogen peroxide was found to oxidize 1 -phenylethanol to acetophenone in acetonitrile homogeneous solution efficiently at room temperature in the presence of a dimeric complex of manganese (IV) [LMn(O) 3 MnL](PF 6 ) 2 (where L = 1,4,7-trimethyl-1,4,7-triazacyclononane) as the catalyst and oxalic acid as a co-catalys…
We derive error estimates for finite element discretizations of phase field models that describe phase transitions in nonisothermal mixtures. Special attention is paid to the applicability of the result for a large class of models with nonlinear constitutive relations and to an approach that avoids an exponential depe…
To develop hydrogen energy, it is important to understand the effects of hydrogen on mechanical properties in all applications — production, transportation, storage and fuel cells. Although a considerable amount of work has been carried out on hydrogen related embrittlement, there is comparatively less work on the eff…
In order to form the necessary data base on platinum and platinum metals, certain tests were carried out on platinum samples of different purity of 99.5%, 99.9% and 99.99%. The degree of cold deformation, annealing temperature and chemical assays were tested as well as their impact on the mechanical properties of plat…