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21

Jun 2017

Microstructural study of Co-based superalloys and ODS steels obtained by Spark Plasma Sintering (SPS)

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The CINN has collaborated with IMDEA Materiales and the University Carlos III in the microstructural study of Co-based superalloys and ferritic ODS steels consolidated by Spark Plasma Sintering. The results of these studies were presented as oral presentations in the VI edition of the National Congress of Pulvimetallurgy that took place in Ciudad Real (Spain) from 7th to 9th June 2017.

The abstracts of the two lectures given are shown below:

Microstructural study of a group 4 (Y-Al-Ti-Zr) ODS ferritic steel consolidated by Spark Plasma Sintering (SPS).

E.Macía1, J.Cornide1, A-García-Junceda2, L.A. Díaz3, M. Campos1.

1 UNIVERSIDAD CARLOS III

2 IMDEA Materiales

3 CENTRO DE INVESTIGACIÓN EN NANOMATERIALES Y NANOTECNOLOGIA (CINN)

Oxide Dispersion Strengthened (ODS) ferritic Steels are extraordinary candidates for nuclear applications due to their good behavior at high temperature and under irradiation conditions .ODS ferritic steel was produced by mechanical alloying and SPS to obtain a complex nanostructure. A four group elements (Y-Ti-Al-Zr) was selected to improve the stability of the precipitates since they are the main responsible for the thermal stability of fine structure. The heterogeneous distribution of stored energy due to the high energy attrition of MA powder will produce an inhomogeneous recrystallization during the consolidation step. After SPS consolidation a heterogeneous grain size distribution was attained, as recrystallization depends on the plastic deformation degree, on the composition of each particle and on the oxide dispersion promoted. Therefore sintering cycle was performed at 1373 K following fast heating rates (from 100 to 600 °C/min) to minimize porosity. The final microstructures were characterized by XRD and electron microscopy (SEM and TEM). In addition, Vickers microhardness and tensile tests was performed to analyze the mechanical response at R.T.

Microstructural study of Co-9Al-9W alloys produced by SPS with Ti and Ta as alloying elementsEstudio microestructural de aleaciones de Co-9Al-9W producidas por SPS con Ti y Ta como aleantes

Marta Cartón-Cordero1 , Mónica Campos2 , Eric Macia-Rodríguez2 , Luis Antonio Díaz, 3 Jesús Cano-Cabello2 , Andrea García-Junceda1 , José M. Torralba2

1 IMDEA Materiales

2 UNIVERSIDAD CARLOS III

3 CENTRO DE INVESTIGACIÓN EN NANOMATERIALES Y NANOTECNOLOGIA

Co-based superalloys with ϒ-ϒ dual phase microstructure are considered a good alternative for high temperature in extreme environmental conditions applications due to their good strength, wear behavior and high oxidation resistance. In this work a fully prealloyed gas atomized powder with the nominal composition of Co-9Al-9W (at%) has been used. With the aim of promoting the ϒ´ phase precipitate, 2 at% of Ti and 2 at% of Ta have been added through mechanical alloying to the original powder. In order to reach a high level of densification maintaining an ultrafine grain size in the microstructure, the powder has been consolidated through Spark Plasma Sintering (SPS). The ϒ´ phase precipitate is obtained after subsequent heat treatments, first a solution treatment and then aging. By X ray diffraction (XRD) technique and scanning and transmission electron microscopy (SEM/TEM), the structural and microstructural changes produced after the heat treatments from the as obtained material have been monitored. The addition of Ti and Ta to the base alloy improves the ϒ’ phase precipitation process, and also affect to its thermal stability, improving the high temperature performance of the alloy. To characterize this influence on the ϒ´solution temperature, a thermo-gravimetric analysis has been performed for different compositions and heat treatments.

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15

Jun 2017

NASA and CINN plan to send mice to International Space Station

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News published in La Nueva España on 21st May 2017

The Nanomaterials and Nanotechnology Research Center (CINN) will study bone mass loss and other microgravity effects suffered by mice sent to Space. The Nanomedicine group of the CINN, led by Dr. Mario Fernández Fraga, takes part in a NASA research project aiming at the study of the human long-time exposure to microgravity and particularly the effect of such microgravity on bone development and disesases like arthritis or osteoporosis….

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16

May 2017

Talk on Nanomaterials at the Chelsea Café Lounge-Pint of Science

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On Wednesday 17 May, Prof. Ramón Torrecillas is giving a talk on Nanomaterials at Chelsea Café Lounge in Oviedo. This talk is part of the 3rd edition of the Pint of Science Festival that takes place over three days (15th-17th May) simultaneously in bars and pubs across eleven countries. This festival aims to make science accessible and fun by bringing current scientific research to the welcoming atmosphere of the bar.

For further information visit the Pint of Science website

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28

Nov 2016

Japan-Spain Joint Workshop on Nanomedicine Research

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The CINN has been invited to participate in the Japan-Spain Joint Workshop on Nanomedicine Research that will be held in Madrid on 1st December 2016. This event is being organized by AMED, MINECO, CSIC and ISCIII and will bring together Researchers in scientific fields related with Nanomedicine and policy representatives from Japan and Spain in order to explore possibilities of collaboration.

The CINN will be represented by Prof. Ramón Torrecillas, director of the CINN, who will give an overview of the Nanomedicine Research Lines at the Nanomaterials and Nanotechnology Research Center. This talk will be part of the workshop session on “Nanotechnology applications on regenerative medicine”

 

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28

Nov 2016

Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS-2016)

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The results of an international research on Zirconia-Graphene Nanocomposites was presented in the frame of the conference “Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS-2016)” that took place in Ekaterinburg, Russia. The work was entitled “Black zirconia-graphene nanocomposite produced by spark plasma sintering” and was undertaken by scientists from the Moscow State University of Technology “STANKIN” and the CINN.

The research team success to fabricate theoretical dense electroconductive poreless black zirconia compacts by adding a small fraction of graphene oxide. This new functionality (electrical-thermal conductivity) enables the use of Spark Plasma Sintering (SPS) avoiding the limitations derived from the low thermal conductivity of zirconia and also allows the machining of complex-shaped components by electro-discharge machining methods (EDM).

For further information read the full paper.

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21

Jul 2016

Lecture: “Materials science: Seeking solutions for the aerospace sector”

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On Friday, 22nd July, Dr. Adolfo Fernández is giving a speech on materials science and its applications in the aerospace sector within the frame of the first edition of the SPLASHDOWN FESTIVAL. This event is organized by Asociación Laniakea and will take place at the Centro de la Laboral de Gijón  from 21 to 24 July 2016.

The Splashdown festival is divided into four parts: a Scientific Congress, an exhibition , informal talks and workshops on astronomy, astrophotography. Dr. Fernández’s lecture is part of the conference programme.

For further information visit the website: www.splashdownfestival.es

 

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15

Jul 2016

Electro conductive alumina nanocomposites from different alumina-carbides mixtures

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The CINN participated last month in the International Conference on Nanomaterial, Semiconductor and Composite Materials (ICNSCM2016) that took place in Singapore with a lecture on alumina-based electro-discharge machined ceramic composites.

Title: Electro conductive alumina nanocomposites from different alumina-carbides mixtures
Authors: Luis A. Díaz1, Adolfo Fernández1, Anna Okunkova2 , Washington Solís2, Pavel Peretyagin2, Francisco J. Gotor3, Ramón Torrecillas1,2

1 Department of Multifunctional Nanomaterials and Nanocomposites, Nanomaterials and Nanotechnology Research Center (CINN-CSIC,UNIOVI, PA), Avda.de la Vega, 4-6, 33940 – El Entrego (Asturias), Spain
2 Moscow State University of Technology “STANKIN”,1 Vadkovskiy per., Moscow, 127055, Russia Federation
3 Instituto de Ciencia de Materiales de Sevilla (ICMS-US), Sevilla, Spain

This work presents the results of an electro-discharge machined ceramic composites consisting of a base non-conductive ceramic component such Al2O3, to which is added sufficient amounts of an electroconductive ceramic nanoparticles such as TiC, TiNC, NbNC, TaNC, and SiC (whiskers) to achieve an electrical resistance of less than about 100W.cm. With these compositions intricate geometries and features as holes, chamfers, slots, angles, changing radii and complex curves can be electro-discharge machined (EDM) into the ceramic body after Pulsed Electrical Current Sintering (PECS) to achieve maximum density and mechanical properties. In EDM, the electrically conductive workpiece or ceramic blank is eroded by electric discharges or sparks which on a small scale generate localized shock waves and intense heat. The four compositions studied were in the same proportion for all raw materials: alumina 42 (vol %) + conductive material (TiC, TiNC, NbNC, and TaNC) 22 (vol %) + SiCw 36 (vol %). Processing was carried out mixing raw materials in the suitable proportions in a polypropylene container with zirconia balls and isopropanol media for 72 hours in order to guarantee the homogeneity of the final compositions. The powders were dried and introduced into a PECS furnace for sintering to 1650ºC (100 MPa/2 min). The diameters of the pieces obtained were 20 and about 40 mm and 7 mm thickness. SiC whiskers reinforced electrically conductive ceramic compositions provide a fully dense material with optimal mechanical properties. The capability of electro-discharge machining obtains good surface quality, chip-free edges, dimensional accuracy and complex shapes. The fracture toughness is improved two to three fold over individual ceramic components. Strength and hardness is also increased. Some composites were tested as a cutting tool to machine IN-718 nickel-base superalloy industrial laminating cylinders. The composites were formed and electro-discharge machined to a standard size cutting insert.

Pruebas de mecanizado con nanocomposites de alumina

Cilinder rolling tested with the composites elaborated

 

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22

Jun 2016

PhD thesis on structural ceramics

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Tomorrow 23rd June 2016, Sergio Rivera Monte is reading his thesis on  “Structural ceramic materials based on alumina toughened ceria-stabilized zirconia. Applications  in the biomedical and dental field“. This thesis has been directed by Prof. Francisco Javier Belzunce Varela (University of viedo) and the head of the CINN research group on “Synthesis and Advanced Characterization of Multifunctional Materials and Nanocomposites”, Prof. Ramón Torrecillas San Millán.

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08

Jun 2016

Importante participación del CINN en el XIV Congreso Nacional de Materiales

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El CINN colabora en la organización del XIV Congreso Nacional de Materiales que se celebra desde hoy 8 de Junio hasta el próximo viernes 11 de Junio en la Escuela Politécnica de Ingeniería de Gijón (Asturias). En el marco de este evento el CINN presentará 9 trabajos relacionados con la investigación en los campos de los biomateriales, la tecnología de sinterización por descarga de plasma y los metamateriales:

Modelización de materiales grafénicos para aplicaciones biomédicas. Ignacio Arrieta[1], Juan José Fernández[1], Álvaro Meana[2], Pablo Fanjul-Bolado[3], Rosa Menéndez[4], Adolfo Fernández[5]. Oral

[1] Química del Nalón, S.A.
[2] Instituto Oftalmológico Fernandez Vega, S.L.
[3] DropSens S.L
[4] Instituto Nacional del Carbón (INCAR-CSIC).
[5] Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (CSIC-Universidad de Oviedo-Principado de Asturias)

Conceptos básicos de diseño de moldes y utillajes para la tecnología SPS. R. Torrecillas[1][2]. Oral

[1] Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (CSIC-Universidad de Oviedo-Principado de Asturias)
[2] Stankin Moscow State Technical University

ZnO containing glasses as effective antimicrobial solution. B. Cabal[1], L. Esteban-Tejeda[2], C. Prado[1], E. Fernández-García[1],[3], J.S. Moya[1], R. Torrecillas[1]. Oral

[1] Nanomaterials and Nanotechnology Research Center (CINN), CSIC – University of Oviedo (UO)
[2] Materials Science Institute of Madrid (ICMM-CSIC)
[3] Alma Tissue Engineering, SL (ALMA-TE)

P2O5-free glass-ceramic scaffolds fabricated by a foaming method for bone tissue engineering. M. Suárez[1],[2], E. Fernández-García[3], A. Fernández[1],[2], R. Torrecillas[1]. Oral

[1] Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (CSIC-Universidad de Oviedo-Principado de Asturias)
[2] Nanoker Research, S.L.
[3] Alma Tissue Engineering, S. L.

Magnetoimpedancia en composites granate de itrio y hierro/grafeno. C. Mallada[1], J. L. Menéndez[1], M. Morales[2], C. Pecharromán[2], Rosa Menéndez[3], Ricardo Santamaría[3]. Oral

[1] Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (CSIC-Universidad de Oviedo-Principado de Asturias)
[2] Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC, Madrid, España
[3] Instituto Nacional del Carbón, INCAR-CSIC

Respuesta celular sobre estructuras tridimensionales de un compuesto de ZrO2-Al2O3-CeO2 obtenidas mediante congelación direccional e impresión 3D. L. Goyos-Ball[1], E. García-Tuñón[2], E. Saiz[2], E. Fernández-García[1], R. Díaz[1], A. Fernández[1], C. Prado[1], R. Torrecillas[1]. Oral

[1] Nanomaterials and Nanotechnology Research Centre, CINN, CSIC-UO-Principado de Asturias, 33940 El Entrego, Asturias, Spain.
[2] Department of Materials, Imperial College London, London.

Híbridos vidrio-grafeno y nanopartículas-grafeno con propiedades antimicrobianas para aplicaciones biomédicas. Belén Cabal[1], Alejandro Criado[2], Juan José Fernández[2], Clara Blanco[3], Zoraida González[3], Rosa Menéndez[3], Ramón Torrecillas[1], Adolfo Fernández[1]. Poster

[1] Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (CSIC-Universidad de Oviedo-Principado de Asturias)
[2] Química del Nalón, S.A.
[3] Instituto Nacional del Carbón (INCAR-CSIC)

Biovidrio sodocálcio ATEG3® como agente hemostático, procoagulante, con capacidad sellante y de regeneración tisular. E.Fernandez-Garcia[1],[2], C.Prado[1], M.Suarez[1], B. Cabal[1], A.Fernandez[1], R.Torrecillas[1]. Poster

[1] Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (CSIC-Universidad de Oviedo-Principado de Asturias)
[2] Alma Tissue Engineering, SL

Development of low melting glasses belonging to P2O5-CaO-Na2O(Li2O)-ZnO system for fire retardant applications. Wei Liu[1], Belén Cabal[1], Deyi Wang[2], Ramón Torrecillas[1], José S. Moya[1]

[1] Nanomaterials and Nanotechnology Research Center (CINN), CSIC – University of Oviedo (UO), Avda de la Vega 4-6, El Entrego 33940, San MartMa del Rey Aurelio, Spain
[2] IMDEA Materials Institute

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07

Jun 2016

Bioactive glasses in Odontology

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Biomaterials for bone replacement have been used for decades in Oral and Maxillofacial Surgery for filling defects. The discovery in the late 60s of bioactive or bioactive glasses glasses (BGs), capable of forming at its surface a biologically active layer in contact with biological fluids, has driven research in search of new innovative biomaterials bioactive properties for the manufacture of an ideal scaffold for bone tissue.

In a recent article published by the Spanish Journal Gaceta Dental CINN researchers explore the adequacy and the promising potential of bioglasses as biomaterial in tissue engineering, both hard and soft and fascinating applications in dentistry.

Further information

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