Bone Regeneration with Wharton's Jelly-Bioceramic-Bioglass Composite
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): C.A. Fernández , C.A. Martínez , M.O. Prado , D. Olmedo , A. Ozols The aim of this development is to optimize a bone substitute (BS) for use in tissue engineering. This is achieved through the combination of three phases in a biocomposite (BCO), in which each is reabsorbed in the site of implantation and replaced by autologous bone (patient's own). The inorganic phases are composed of irregular particles (150-300 microns) obtained by milling and sieving of a biphasic bioceramic (BC) of hydroxyapatite (HA of bovine origin) with 40% (wt....
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
The Use of a Non-conventional Fracture Mechanics Parameter for Estimating SN Curves of Welded Joints
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Jorge Alberto Rodriguez Duran , Alexandre Santos Francisco , Dionisio Jose Rodrigues da Costa The notch stress intensity factor (NSIF) is an extension of the stress intensity factor (SIF) concept for pointed V-notches which allows the stress field intensity in uncracked geometries to be known. A fatigue crack departing from the weld toe, for example, will be under the influence of the NSIF as long as the weld toe is modeled as a pointed V-notch. If the path and shape of this crack are considered constant, then their driving force, the SIF,...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Effect of the Manufacturing Process on the Texture and the Fraction of Stress-induced Martensite in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy
This study analyzes how the particular forming process and the consequent texture development affects the amount of stress-induced ɛ martensite in an Fe-15Mn-5Si-9Cr-5Ni shape memory alloy. Besides determining the quantity of martensite produced, we measured the critical transformation temperatures and analyzed the effect of the manufacturing procedures on the SME properties. (Source: Procedia Materials Science)
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
19th Century Wooden Ship Sheathing. A Case of Study: The Materials of Puerto Pirámides 1, Península Valdés
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Horacio M. De Rosa , Nicolás C. Ciarlo , Marcela Pichipil , Ana Castelli Copper alloy sheathing used to protect ships hulls from different wood-infesting organisms (borers and foulers) was widespread since the late 18th century. In this work the characterization results of a sheathing fragment and tacks from the site Puerto Pirámides 1, Peninsula Valdes (Chubut Province, Argentina) are presented. Through metallographic analysis by means of Light Microscopy and Scanning Electron Microscopy (SEM), and chemical composition determination by...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Relationship between the Electrogalvanized Stages and the Income of Hydrogen in a Low Carbon Wire Steel
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): M.N. Delpupo , M.N. Inés , G. Candia , C. Asmus , G.A. Mansilla Hydrogenation of steel products in the electrochemical processes occurs to some extent in all stages of coating. The decisive contribution in the hydrogenation of steel is galvanized by itself, however, the influence of preliminary operations like degreasing and pickling also are considered as sources of hydrogen embrittlement. In the literature,numerousprevious studies are aimed on the effect of deformation on the corrosion behavior of zinc coating, however limited to the ...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Mechanical Behavior of Nitrided 316L Austenitic Stainless Steel Coated with a:C-H-Si
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): E.L. Dalibon , D. Heim , Ch. Forsich , S.P. Brühl The austenitic stainless steel AISI 316L is used in chemical and other industries due to its good corrosion properties; however, it has a poor wear resistance. Plasma assisted treatments such as diffusion process and/or coatings can be used in order to improve the tribological properties. The a:C-H-Si coatings have low friction coefficient and wear resistance; in addition, they are chemically inert although they present adhesion problems when they are deposited on metallic substrates. In ...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Material Characterization by Electrical Conductivity Assessment Using Impedance Analysis
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Guillermo Cosarinsky , Javier Fava , Marta Ruch , Adrián Bonomi Eddy currents non destructive testing is a well known method for material characterization, which is sensitive to different properties of conductive materials, such as: electrical conductivity, magnetic permeability, phase proportions, hardness, size, discontinuities, etc. These properties alter the flow of the currents induced in the sample under test by an AC magnetic field. One of the most common applications of the method is the evaluation of electrical conductivity, by ...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Corrosion of Steel Alloys with Ferrite Coating
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): C.A. Herme , G.P. Cicileo , P.G. Bercoff , S.E. Jacobo The corrosion protection offered by coatings of hexagonal Sr ferrites on steel samples in the presence of chloride was evaluated by electrochemical techniques. Different samples were prepared using Nd-Co doped and un-doped strontium hexaferrite coatings, and tested in sodium chloride (NaCl) solutions during 45 days. Time variation of the corrosion potential and polarization resistance measurements were carried out for each of the tested steel samples at different immersion times. All ...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Scanning Optical Coherence Tomography Applied to the Characterization of Surfaces and Coatings
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): S. Cerrotta , E.N. Morel , J.R. Torga This paper shows the technique of optical coherence tomography in the frequency domain (OCT-FD) to obtain surface topography and tomography of surface coatings. The setup is based on a superluminescent diode centered on 849nm with an spectral wide of 50nm as the light source, a single-mode fibre Michelson interferometer and a spectrometer as the detector system. This scheme allows having compact and robust equipments that was designed to be used in an industrial environment. With this system it can be ...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Reversibility Studies of Clay Hydration Degree in its Natural and Composite Condition
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Natalia Castrillo , Adela Mercado , Cristina Bolzone In this work, the regeneration of desiccant compounds materials was studied after of its adsorption capacity. Also, reuse of the materials was evaluated after progressive regenerations. For this, the effect of regeneration temperature on adsorption capacity of the desiccant compounds materials was analyzed. For the tests adsorption of water a certain amount of dry sample was placed in a desiccator at 98% RH and 298K, until reach the time of equilibrium, in which the final weight was reco...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Laser Induced – Breakdown Spectroscopy for Quantitative Sn Analysis in Zr Based Alloys
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Juan Carricondo , Martín Iofrida , Carlos Ararat , Manuel Iribarren , Carolina Corvalán Laser induced breakdown spectroscopy (LIBS) calibration curves for ZrSn alloys were obtained. Relationships between the atomic emission lines present in the spectra and the Sn concentration of the samples showed a linear behavior. Also Zy-2 standards were measured to contrast the behavior of the technique in different kind of alloys. The choice of proper Sn and Zr lines and the equipment's parameters, such as “integration start delay” and the sp...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Influence of CaCl2.2H2O Content on the Productive Process of Composites from Cotton Gin Waste
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): H.J. Muñoz , J. Ferreyra , D.D. Aguirre , A.M. Anderson , A. Bruselario , C.A. Defagot , M.F. Carrasco Previous studies have shown the feasibility of production of masonry blocks and panels from agglomeration of cotton gin waste and calcium binders. Cotton gin waste is a serious problem for ginning plants, because in Argentina approximately 300,000 t of lignocellulosic wastes are produced annually without any final disposal destination. The accumulation of these residues is associated with pests and fire hazards. Since these composite...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Raman Scattering Applied to Materials Science
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Andrés Cantarero One of the most powerful techniques to extract physical and chemical information of a material is the light scattering. Opposite to x-ray scattering for instance, where an average of the sample properties is obtained, Raman scattering is a local probe which can be used to detect inhomogeneities, local strain, lack of crystallinity, anharmonicities or information on the electronic structure by means of resonant Raman scattering. In this work, we will analyze the main contributions of Raman scattering in Materials Sciences. A...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Initial Studies about Gold Leaching from Printed Circuit Boards (PCB's) of Waste Cell Phones
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Sebastián Camelino , Javier Rao , Roger López Padilla , Roberto Lucci Excessive consumption of mobile phones, a decrease in their life time and, therefore, an increase in the generation of this type of electronic scrap, is noted in recent years. Printed circuit boards (PCB's) from waste cell phones are attractive resources because of the valuable metals Cu, Au, Ag, Pd they possess, but at the same time dangerous due to their content of heavy metals. The treatment of these boards is desirable from an economic and environmental perspectiv...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
Proposed Solution for Random Characteristics of Aluminium Alloy Wire Rods Due to the Natural Aging
Publication date: 2015 Source:Procedia Materials Science, Volume 9 Author(s): Claudio Bunte , Moisés Glassel , Carlos Medina , Diego Zalcman In the last 50 years in the worldwide market for power transmission cables, there has been a tendency to replace aluminium cables electrical grade (EC) with steel cables by fully aluminium alloy (AAAC). The advantage in using cable AAAC is mainly economic (least amount of support structures and maintenance), addition to the elimination of the problems of galvanic corrosion and improved abrasion resistance. In order to obtain better mechanical properties, respect to the pure a...
Source: Procedia Materials Science - July 3, 2015 Category: Materials Science Source Type: research
