TiO2-Based Sorbent of Lead Ions
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Jana Seidlerová, Ivo Šafařík, Lucia Rozumová, Mirka Šafaříková, Oldřich Motyka The non-magnetic TiO2 powder and magnetically modified TiO2 powder were employed for the sorption experiments. FeSO4.7H2O was used for synthesis of magnetically responsive TiO2. The non-magnetic and prepared magnetic materials were characterized by scanning electron microscopy and X-ray diffraction methods. The particle size and specific surface area were determined. A detailed study of the adsorption process performed using batch adsorption ex...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Volatile Organic Molecules Sorption onto Carbon Nanotubes: Experiment and Molecular Modeling
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Gražyna Simha Martynková, Daniela Plachá, Eva Plevová Two organic compounds (naphthalene and formaldehyde) were investigated for their sorption properties on to multiwall carbon nanotubes in original state and purified using acid treatment. Nice enhancement of sorptive ability was observed after nanotube purification. Smaller organic molecule was adsorbed in higher weight percentage (reaching 30wt.%) than naphthalene (approx.13wt.%). Molecular modeling confirmed adsorption centers of organics on carbon nanotubes being located on th...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Magneto-Plasmonic Properties of Au/Fe/Au Planar Nanostructures: Theory and Experiments
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Jaroslav Vlček, Michal Lesňák, Petr Otipka, Jaroslav Sobota The non-reciprocity of magneto-optical reflection response by surface plasmon excitation in the planar Au/Fe/Au/glass nano-systems with prism coupling is studied. In order to simulate diffraction response to external magnetic field theoretical matrix model based on rigorous coupled waves algorithm is applied that allows to simulate both the influence of metallic layer thicknesses and external magnetic field. The two new response factors related to response function are in...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Optical Modeling of Microcrystalline Silicon Deposited by Plasma-Enhanced Chemical Vapor Deposition on Low-Cost Iron-Nickel Substrates for Photovoltaic Applications
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Z. Mrázková, K. Postava, A. Torres-Rios, M. Foldyna, P. Roca i Cabarrocas, J. Pištora This paper deals with the optical modeling of thin hydrogenated microcrystalline silicon films grown on flexible low-cost iron-nickel alloy substrates by low-temperature (175°C) plasma-enhanced chemical vapor deposition. This material serves as the absorber in solar cells and hence it has direct impact on the resulting solar cell performance. Since the crystallinity and the material quality of hydrogenated microcrystalline silicon films evol...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Antibacterial Kaolinite Based Nanocomposites
In this study we focused on antimicrobial nanocomposites based on kaolinite, when two series of nanocomposites were prepared. In the first case, kaolinite (KAO) was used as the carrier for antibacterial drug. Secondly, kaolinite modified with dimethyl sulphoxide (DMSO) was used. In both series, chlorhexidine dihydrochloride (CH) acts as an active antimicrobial component. The resultant samples were characterized by X – ray diffraction (XRD) and infrared spectroscopy (FTIR). The antimicrobial activity of prepared composites against bacteria strains Staphylococcus aureus, Escherichia coli and against yeast Candida albicans ...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Determination of Anisotropic Crystal Optical Properties Using Mueller Matrix Spectroscopic Ellipsometry
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): K. Postava, R. Sýkora, D. Legut, J. Pištora In this paper the Mueller matrix ellipsometry in the spectral range from 0.73 to 6.4eV measured using dual rotating compensator ellipsometer RC2 (Woollam company) is applied to study anisotropic crystals. First we summarize the effects of optical anisotropy to Mueller matrix spectra. As an example of an uniaxial sample we have characterized a Rutile (TiO2) tetragonal crystal. The optical axis of the sample is parallel to its surface. The sample is characterized at variable angle of incide...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Analysis and Modeling of Depolarization Effects in Mueller Matrix Spectroscopic Ellipsometry Data
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): L. Halagačka, K. Postava, J. Pištora In this paper we present importance of depolarization effects modeling to fit spectroscopic Mueller matrix ellipsometry data. The relevant theoretical background based on Mueller matrix formalism is presented. The sample of SiO2 layer (approx. 1μm thick) on silicon substrate is used to demonstrate depolarization effects in obtained experimental data. In the first step the presence of interferences in the layer is used for modeling of depolarization effects caused by finite spectral resolution of ...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Response of Alumina Foam to Tensile Mechanical Loading Including Stress Concentrator Effect
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Ivo Dlouhy, Zdenek Chlup, Hynek Hadraba, Lukas Rehorek Tensile test methodology for ceramic foams has been elaborated and test specimens of different dimensions and those containing central sharp notch (simulating a crack) were tested. Tested material was commercially available alumina based ceramic foam commonly used as filters of light metals melts. The foam cell size used within this study was 60 PPI. The main aim of the investigation has been to prove experimentally whether there is any stress concentration effect in the open cel...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Effects of Inclusion on the In-plane Mechanical Performance of Micro-Lattice Structure
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): K. Ushijima, W.J. Cantwell, D.H. Chen In this paper, the effects of the existence of inclusion or missing cells on the overall in-plane mechanical behavior of micro-lattice plate is discussed by using the numerical finite element analysis. The micro-lattice plate can be manufactured using the selective metal laser melting technique, and various shapes of its micro-architecture can be easily produced even if there are non-uniform cells. In particular, effects of boundary condition of the plate's edges, cell's geometry and the shapes of ...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Direct Bonding of SUS304 Stainless Steel by Metal Salt Generation Bonding Technique with Formic Acid
In this study, the effect of the metal salt generation bonding technique on the strength of a direct-bonded SUS304 stainless steel interface was investigated. SUS304 stainless steel surfaces were modified by boiling in 50% formic acid, and direct bonding was performed at a bonding temperature of 1023-1123K under a pressure of 147N (for a bonding time of 900 s). After direct bonding, the specimens were subjected to the peel test for evaluating their strength. As a result of the surface modification, bonded joints were obtained at bonding temperature of 30K lower than that required for the unmodified surfaces, and the peel s...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Microstructure Modification of CGDS and HVOF Sprayed CoNiCrAlY Bond Coat Remelted by Electron Beam
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Petra Gavendová, Jan Čížek, Jan Čupera, Makoto Hasegawa, Ivo Dlouhý In the present work two techniques are combined to optimize bond coat properties before thermal barrier coating (TBC) application, the cold gas dynamic spraying (CGDS) and electron beam remelting (EB). Results of the work focused on comparison of high velocity oxygen fuel (HVOF) and CGDS CoNiCrAlY bond coats are firstly presented. Than the effect of the electron beam remelting of the CoNiCrAlY coating manufactured by HVOF and CGDS deposition techniques is dee...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Delamination Property of Modeled Air Plasma Sprayed-Thermal Barrier Coatings under Shear Loading: Effect of Difference in Chemical Composition of Bond Coat
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Makoto Hasegawa, Sho Yamaoka In order to understand the effect of the difference in chemical composition and microstructure of bond coat (BC) layer on delamination properties, pushout tests were performed on modeled air plasma-sprayed thermal barrier coatings (APS-TBCs). Nickel-platinum-aluminides (Ni-Pt-Al), hafnium modified nickel-platinum-aluminides (Ni-Pt-Al-Hf) and NiCoCrAlY alloys were used as BC alloy. Hafnium and aluminum oxide were formed in needle like shape when the Ni-Pt-Al-Hf alloy was used. Vickers hardness of BC alloy decr...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Precipitation Reactions in a Copper – Bearing GOES
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Vlastimil Vodárek, Anastasia Volodarskaja, Šárka Miklušová, Jan Holešinský, Ondřej Žáček The paper deals with minor phase evolution in a Cu – bearing grain oriented electrical steel during the following production steps of the AlN + Cu industrial processing route: hot rolling of slabs, the 1st cold rolling + decarburization annealing and the 2nd cold rolling + slow laboratory heating to the temperature of primary recrystalization. Thermocalc calculations were used for prediction of the effect of copper additions on equ...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
An Image Analyzing Method for the Vaguely Grain Boundary Detection by a Reaction Diffusion System
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): K. Nakane, H. Mahara, K. Kida To analyze the images of structures, we often detect the edges of grains. Since the grain boundaries are not so clear, it takes a lot of time to detect them, manually. Here, we present a support method to detect the edge from structure images. We make blurry images clear by solving non-linear partial differential equations numerically. Combining ordinary image analysis methods, we can detect edges of grains easily. In this note, we introduce the results of our method and discuss the possibility of this met...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
Diffusion of Hydrogen in the TRIP 800 Steel
Publication date: 2016 Source:Procedia Materials Science, Volume 12 Author(s): Jaroslav Sojka, Petra Váňová, Vlastimil Vodárek, Maria Sozańska The presented paper is devoted to the study of hydrogen diffusion characteristics in the C-Mn-Si TRIP 800 steel. The steel was tested in three different states: in as-received state after hot and cold rolling and subsequent heat treatment; and furthermore after 5% and 10% tensile deformation. Hydrogen diffusion characteristics were studied by means of electrochemical permeation method. Two build up transients corresponding to lower and higher charging current densit...
Source: Procedia Materials Science - May 5, 2016 Category: Materials Science Source Type: research
