INTECINCONICETUBAFacultad de Ingenieria

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Associate Laboratories | Interdisciplinary group in materials

Interdisciplinary Materials Group

Institute for Interdisciplinary Studies in Engineering (IESIING).Faculty of Engineering and Computer Science. Catholic University of Salta (FII-UCASAL).
Country Castañares s / n. Salta. 4400
Phone: + 54 387 4268587
E-mail: gim@ucasal.net

Research Field

Amorphous metallic alloys and hybrid.
Biomaterials.
Applications of supercritical CO2.

Members

Direction:

Gorustovich, Alejandro. PhD. Investigador adjunto CONICET.

Moya, Javier. PhD. Investigador Independiente de CONICET. Profesor Extraordinario.

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Marta, Leonardo J. Engineer. Becario CONICET.

Cornejo, María Del Pilar. M.S. Auxiliar docente.

Haro Durand, Luis A. M.S. Becario CONICET.

Vargas, Gabriela. M.S. Auxiliar docente.

Bravo, Marcela. Tesista de grado.

Cadena, Vanesa. Tesista de grado.

Tita, Gerardo J. Tesista de grado.

Villalba, Guillermo. Tesista de grado.

Zambrano, Patricia. Tesista de grado.

Work Description

LINES OF RESEARCH AND DEVELOPMENT:

AREA: amorphous metallic alloys and hybrid.

Amorphous metal alloys are materials that have the particularity to possess a disordered internal structure, like glass, and being metal. This leads to interesting combinations of magnetic, mechanical, chemical, transportation, etc. making the study of these materials a very current issue in materials science. To obtain the disordered structure is immobilized that owns the molten material while acting in two ways: 1) rapid cooling to freeze so the structure of the liquid, and 2) with an appropriate adjustment of the chemical composition of the alloy with adding elements to stop or delay the nucleation of the crystalline phase and cooling rates lower. Eventually, they may be subjected to heat treatment to achieve the formation of a second phase nanocrystalline or otherwise induce the formation of dendrites during cooling by controlling the chemical composition.

1. Development of amorphous and nanostructured alloys with high cooling rates: The Fe and Co base alloys amorphous and nanocrystalline ferromagnetic materials are softer than they are marketed. The objective of this line is the development of amorphous alloys in the form of sheets or strips by melt spinning technique with cooling rates of around 106K/seg looking to increase their excellent magnetic properties and enhancing the mechanical properties with an interest in its early transfer to the domestic industry. Currently there are alloys with values of saturation magnetization Ms = 1.8T and coercive fields Hc = 2 A / m. However, the HC can be reduced to lower values of A / m sacrificing a little of Ms.
This line was initiated in 1995 through collaboration with the Institute of Applied Magnetism "Salvador Velayos in Madrid.Currently initiated a period of technology transfer for the production of these materials in the country.

2. Development of amorphous alloys and hybrid low cooling rates: The objectives of this line are designed and developed massive amorphous alloys Fe based or hybrid (amorphous / crystal), whose soft magnetic properties are superior to that of the best traditional materials and / or the mechanical properties allow its use as a structural element. The cooling rates in the case of bulk samples are much lower than in the previous case (10 to 100 K / sec) and here plays a very important to study the chemical composition to achieve the award of amorphous material. These alloys usually have very high mechanical strength (two to three times that of steel) to reach base values for Fe 5400MPa This line was created in 2006 and has the support of Dr. Marcello Baricco, Department of Chemistry University of Torino.

AREA: Biomaterials

The Biomaterials Laboratory is working on different lines of research, which mainly focused on the development, characterization and biological evaluation of biocompatible materials feasible to be used in tissue engineering as well as through its implementation in regenerative medicine procedures:

1. Study of the angiogenic effects of ionic products of dissolution of bioceramic materials such as bioactive glasses of the SiO2-CaO-Na2O-P2O5 (45S5) modified by boron, copper and strontium. To this end, using different experimental models in vitro and in vivo.

2. Evaluation of the antibacterial capacity of new composite materials. The antibacterial tests were performed on bacteria of the genus Staphylococcus, especially S. and S. aureusepidermidis in view of the importance of these pathogens in the failures associated with implant biomaterials used in orthopedic area.

In the different lines of interdisciplinary research work in close collaboration with researchers from CONICET: Prof. Dr. José M.Porto Lopez (INTEMA), Dr. Alberto Baldi (IBYME), Prof. Dr. Ricardo Sureda (UNSA), Dr. Carina Audisio (iniquity) and Dr. Maria Paola Zago (IPE). The interaction with the international collaborator (Prof. Dr. Boccaccini) allows access to new manufacturing techniques and characterization of biomaterials available, both at Imperial College London and University of Erlangen-Nuremberg, Germany.

AREA: Applications of Supercritical CO2:

GIM facilities have a supercritical CO2 pilot plant, designed and manufactured in UCASAL under the Project SECyT-UCASAL PFIP. This line starts in 2006 and 2009 is integrated with the Universidad Nacional de Rio Cuarto, for testing set. A fluid is called supercritical when in certain conditions of pressure, Pc, and temperature, Tc, upper critical calls. In the case of CO2, these are Pc = 7.38MPa and Tc = 31 ° C. Supercritical fluids possess properties that are commonly known as "a hybrid between a liquid and a gas", ie can spread like a gas and dissolve materials like a liquid. It is characterized by a wide range of densities that can be taken. Above the critical conditions, small changes in pressure and temperature cause large changes in density.
The different lines which are working with this silver pilot are:

1. Extraction of pigments, resins and vegetable oils. (Aromatic, chia, nuts).
2. Aerogel Collection.
3. Proficiency testing of supercritical CO2 as a reaction medium for different technological applications.
4. Services to third parties.