Materials Literature
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The electrical properties of Ca Zr 0.9 Y 0.1 O 3 − δ (CZY) were studied as a function of both oxygen partial pressure ( P O 2 ) and water vapor partial pressure ( P H 2 O ) in the temperature range of 500 – 950 ° C and the partial conductivities of protons, holes, and oxygen vacancies were calculated from the defect m…
In boiling water reactors (BWRs), stress corrosion cracking (SCC) has occurred in Alloy 600 and Alloy 182, 132 and 82 weld metals. Most BWRs mitigated SCC by injecting H 2 into the feed water, although the levels vary by ~8X depending on whether they use electrocatalysis and low H2, or only moderate H 2 . Under modera…
In this study, lead free (K0.5Na0.5)(Nb0.94Sb0.04)O3 + 1.2 mol% K4CuNb8O23 + x mol%La2O3 ceramics were prepared by conventional solid-state sintering method. The effect of La2O3 on the crystal structure, dielectric and piezoelectric properties of the ceramics were investigated in order to improve the dielectric and pi…
Cardiovascular implants such as stents or artificial vascular grafts established in clinical application to date are generally designed as long-term implants. An important requirement for the successful application of these devices is the haemocompatibility of their interface to the blood stream, which often is approa…
Synthetic plastics are non-degradable and cause waste disposal problems leading to environmental pollution. Bioplastics (polyhydroxyalkanoates) are considered good substitutes for petroleum derived synthetic plastics because of their similar physical and chemical properties. Main advantage of bioplastics is that they…
A peer-reviewed conference paper given at the Digital Fabrication: methods, tooling and processes panel at the Digital Fabrication 2011 Conference, NIP 27, 27th International Conference on Digital Printing Technologies. \n \nThis paper describes the design and fabrication of novel “soft” structures and mechani…
Poly (6-N,N-dibutylamino-1,3,5-triazine-2,4-dithiol) nanofilm (PDB) were prepared by electropolymerization of 6-N,N-dibutylamino-1,3,5-triazine-2,4-dithiol monosodium (DBN) on an aluminum alloy (AA5052) surface. Cyclic voltammetry was used to study the electrochemical polymerization mechanism and the growth process. X…
The intracellularly-grown-Au-nanoparticles (IGAuNs) technique was employed to analyze the surface-enhanced Raman scattering (SERS) spectra of nasopharyngeal carcinoma cells (CNE-1 cell line). There are only six obvious Raman bands (718, 1001, 1123, 1336, 1446, 1660 cm −1 ) in the normal Raman spectrum of living CNE-1…
Zu den Hochtemperaturwerkstoffen werden alle Materialien gezählt, die oberhalb von rund 500 °C dauerhaft für Bauteile eingesetzt werden können und damit langzeitig ausreichende mechanische Eigenschaften und Hochtemperatur-Korrosionsbeständigkeit aufweisen müssen. Dafür kommen metallische und keramische Werkstoffe infr…
We introduce a family of two-dimensional latticemodels of quasicrystals, using a range of square hard cores together with a soft interaction based on an aperiodic tiling set. Along a low temperature isotherm we find, by Monte Carlo simulation, a first order phase transition between disordered and quasicrystalline phas…
The effect of microstructure of nickel-aluminum bronze alloy (NAB) on the corrosion behavior in artificial seawater is studied using linear polarization, impedance and electrochemical noise tests. The alloy was heat treated in different heating cycles including quenching, normalizing and annealing. Microstructure of t…
The titania nanocoatings on indium tin oxide (ITO) were succefully obtained by the sol-gel process in an aqueous solution using the titanium diethanolamine complex as the precursor. FT-IR, UV – VIS, Raman spectroscopy and X-ray diffraction techniques have been used to investigate the chemical and physical changes duri…
Conductive polymers are a new class of materials, which exhibit highly reversible redox behavior and unusual combination of properties of metals and plastics. The conductivity of a polymer can be increased several-fold by doping it with a suitable dopant. Doping plays a very important role to convert the polymer into…
Abstract The purpose of the chapter is to provide a condensed introduction for later chapters. Major features of atomic order and disorder in hydrous phyllosilicates are presented. Emphasisis on layer charge and the effects of cation distributions, layer stacking (polytypism), interstratified systems, modulated phyllo…
The influence of Al and Zn atoms on the stability of the Mg 7 Ti compound and its hydride Mg 7 TiH 16 has been studied theoretically. The calculations have been carried out in terms of the full-potential linearized augmented plane wave method. It has been demonstrated that the partial substitution of Al or Zn atoms fo…
We designed a scheme to diagnose and assess the severity levels of the partial discharge(PD) provoked by high-voltage electrode defect on GIS insulator surface.With the application of gradually increased voltage,long-term tests were conducted on a well-established 252 kV GIS experiment platform to observe the entire e…
鋼構造物を腐食による致命的損傷に対して，安全に供用するためには，部材・部位レベルの腐食環境を定量的に把握した上で，その経時腐食挙動を評価することが重要になる．本研究ではFe/Ag対で構成されるACM型腐食センサーを用いて，降雨の影響を受ける無塗装普通鋼板の経時腐食挙動を評価するための方法を提案することを目的とした．そのために，無塗装普通鋼板を用いた大気暴露試験を行った．また，試験体の表裏面における腐食環境と平均腐食深さの関係を定量評価するために，それらの腐食環境をACM型腐食センサーによりモニタリングした．
Tungsten oxide (WO 3 ) nanomaterials have been extensively researched for applications such as semiconductor gas sensors and photocatalysis. We have synthesized WO 3 nanorods (diameters: 100–150 nm; lengths: 400–500 nm) with high yields by thermal chemical vapor deposition (CVD). In our unique two-step heating process…
A new sequential limit analysis scheme with application to geotechnical penetration problems is presented. The new scheme relies on previously developed procedures for classical limit analysis as well as on new adaptive remeshing techniques and robust and efficient mathematical programming algorithms. Two plane strain…
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