Effect of the initial particle size distribution on the properties of suspension plasma sprayed Al2O3-TiO2 coatings

“NOTICE: this is the author’s version of a work that was accepted for publication in Surface & Coatings Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Surface & Coatings Technology, [268 (2015) 209-215] DOI 10.1016/j.surfcoat.2014.12.010¨Al2O3-TiO2 coatings have been deposited by atmospheric plasma spraying from agglomerated, nanostructured powders showing better properties than those of their conventional (microstructured) counterparts. These nanostructured coatings can be also obtained by suspension plasma spraying however the research on suspension plasma sprayed Al2O3-TiO2 is still scarce. Consequently, it is crucial to study the effect of the suspension characteristics on the coating properties and to optimize the deposition process. In this work, Al2O3-13 wt.% TiO2 tribological coatings were successfully deposited by suspension plasma spraying from three different feedstocks: a nanometric suspension and two bimodal suspensions with different solid contents made up of titania nanoparticles and alumina submicron-sized particles. The coating microstructure and phase composition were characterized using scanning electron microscopy and X-ray diffraction analysis. Moreover, nanoindentation technique was used to determine the nanomechanical properties of coatings. The influence of the feed suspension characteristics on the final coating quality was analyzed. Findings showed that similar microstructures and phases were developed after depositing the different feedstocks. In addition suspension feedstock made up of nanoparticles resulted in a coating with better mechanical properties. However the use of submicron-sized particles in the suspension feedstocks gives rise to some technical and economic advantages in the process which should be taken into account when a suspension plasma spraying process is to be setup. (C) 2014 Elsevier B.V. All rights reserved.This work has been supported by the Spanish Ministry of Science and Innovation (project MAT2012-38364-C03) and it has been co-funded by ERDF (European Regional Development Funds).Vicent, M.; Bannier, E.; Carpio, P.; Rayón Encinas, E.; Benavente Martínez, R.; Salvador Moya, MD.; Sánchez, E. (2015). Effect of the initial particle size distribution on the properties of suspension plasma sprayed Al2O3-TiO2 coatings. Surface and Coatings Technology. 268:209-215. https://doi.org/10.1016/j.surfcoat.2014.12.010S20921526

About the origin of the Mediterranean Waters warming during the twentieth century

En prens

Updating temperature and salinity mean values and trends in the Western Mediterranean: the RADMED project

Postprin

La psicología en el cienciograma de los países iberoamericanos

El objetivo de este trabajo es presentar una comparativa de las representaciones científicas de la Psicología en distintos países iberoamericanos; para ello utilizamos una metodología de cocitación de categorías temáticas (clasificación JCR-Thompson & Cia.) que nos facilita la representación de la actividad científica. Los mapas resultantes permiten focalizar el área de Psicología, cuya representación nos servirá como base de información para el análisis de la disciplina, en el ámbito científico de cada país, con visibilidad internacional. Con este estudio se ofrece una visión empírica de la estructura que subyace en la Psicología de los países objeto de estudio, esto es de importancia puesto que la mayoría de los científicos tienen una idea intuitiva de esta estructura, que puede o no corresponderse con la realidad, pero de esta manera se les presenta una visión global de toda la disciplina que favorece el análisis objetivo de la misma en función del comportamiento de los científicos en la comunicación de la ciencia a través de los canales formales establecidos. Este modelo nos permite realizar una comparación objetiva de la investigación psicológica entre ocho países iberoamericanos.The objective of this study is to compare the scientific representation of Psychology in the different Latin-American countries. We use a methodology of subject categories cocitation (JCR-Thomsom Cia, Subject Category Listing) which facilitates the representation of the scientific activity, the resulting maps permit us to focus on the Psychology Area, whose representation will serve as information base for the analysis of the discipline in each country scope, with international visibility. This is an empirical view of the underling structure in the Psychology in the countries studied and this is interesting since the majority of scientist have an intuitive idea of this structure which may or may not correspond to reality. Nevertheless our representation show an objective global view based on the scientist formal communication behavior. With this model an objective comparison of the Psychology research in the eight most important Latin-American countries is carried out

Psychology in spanish science through journal cocitation analysis

Con este estudio pretendemos conseguir una aproximación a la representación actual de la estructura intelectual de la Psicología en España, como dominio de conocimiento científico. Para ello utilizamos el Análisis de Dominio como enfoque teórico que permite acoger el método bibliométrico más adecuado para desvelar la estructura intelectual de una disciplina., este método denominado análisis de cocitación, está caracterizado por su objetividad, y en este caso, utiliza la revista como unidad de medida. Por tanto la representación resultante nos permite hacer agrupaciones en conjuntos de revistas, según su similitud temática, consiguiendo así delimitar las diferentes líneas o frentes de investigación que conforman la estructura intelectual actual de la Psicología Española.The intention in this article is to represent the ongoing intellectual structure of Psychology research (as domain of scientific knowledge) in Spain. To this end within the domain analysis the most suitable bibliometric method to reveal the intellectual structure of the discipline in Spain has been selected. This method is cocitation analysis, which is characterized by its objectivity, and in this case, with journals as the unit of measurement. Therefore the resulting representation permits us to group the journals according to the similarity of subject matter marked by the uses of Spanish researcher. This shows different research lines or fronts that shape the intellectual structure of Spanish Psychology.Este trabajo ha sido financiado por la Junta de Extremadura-Vicepresidencia Segunda y Consejería de Economía, Comercio e Innovación y el Fondo Social Europeo, como parte del proyecto de investigación PRJ06A200 y por el Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica 2008-2011 y el Fondo Europeo de Desarrollo Regional (FEDER) como parte de los proyectos TIN2008- 06514-C02-01 y TIN2008-06514-C02-02

Histological response of soda-lime glass-ceramic bactericidal rods implanted in the jaws of beagle dogs

Bacterial and fungal infections remain a major clinical challenge. Implant infections very often require complicated revision procedures that are troublesome to patients and costly to the healthcare system. Innovative approaches to tackle infections are urgently needed. We investigated the histological response of novel free P2O5 glass-ceramic rods implanted in the jaws of beagle dogs. Due to the particular percolated morphology of this glass-ceramic, the dissolution of the rods in the animal body environment and the immature bone formation during the fourth months of implantation maintained the integrity of the glass-ceramic rod. No clinical signs of inflammation took place in any of the beagle dogs during the four months of implantation. This new glass-ceramic biomaterial with inherent bactericidal and fungicidal properties can be considered as an appealing candidate for bone tissue engineeringThis work was supported by the Spanish Ministry of Science and Innovation (MICINN) under the projects MAT2012-38645. A.P. Tomsia work was supported by the National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR) Grant No. 1R01DE015633S

Seasonal and Long-Term Variability of the Mixed Layer Depth and its Influence on Ocean Productivity in the Spanish Gulf of Cádiz and Mediterranean Sea

The warming of the surface ocean is expected to increase the stratification of the upper water column. This would decrease the efficiency of the wind-induced mixing, reducing the nutrient supply to the euphotic layer and the productivity of the oceans. Climatic projections show that the Mediterranean Sea will experience a strong warming and salting along the twenty first century. Nevertheless, very few works have found and quantified changes in the water column stratification of the Western Mediterranean. In this work, we obtain time series of Mixed Layer Depth (MLD) along the Spanish Mediterranean waters and the Gulf of Cádiz, using periodic CTD profiles collected under the umbrella of the Ocean Observing system of the Instituto Español de Oceanografía (IEO-CSIC). The length of the time series analyzed is variable, depending on the geographical area, but in some cases these time series extend from the beginning of the 1990s decade. Our results show that at present, no statistically significant changes can be detected. These results are confirmed by the analysis of MLD time series obtained from Argo profilers. Some of the meteorological factors that could affect the water column stratification (wind intensity and precipitation rates) did not experience significant changes for the 1990-2021 period, neither were observed long-term changes in the chlorophyll concentration. The hypothesis proposed to explain this lack of trends, is that the salinity increase of the surface waters has compensated for the warming, and consequently, the density of the upper layer of the Western Mediterranean (WMED) has remained constant. As the wind intensity has not experienced significant trends, the stratification of the Spanish Mediterranean waters and those of the Gulf of Cádiz would have not been affected. Nevertheless, we do not discard that our results are a consequence of the short length of the available time series and the large variance of the variables analyzed, evidencing the importance of the maintenance of the ocean monitoring programs.En prens

Evaluación resistográfica en elementos de maderas desfibradas de la torre de lixiviación de la oficina salitrera Santa Laura en Chile. Patrimonio de la Humanidad

The leaching tower is located in the Santa Laura saltpeter works office in Chile. In recent years studies have been carried out, using Non Destructive Techniques (TND), which have determined that the tower is in good condition. However, there are doubts regarding the actual dimensions of the construction elements affected by the desfibration. The present study had the objective of evaluate defibred wood elements, from the leaching tower of the Santa Laura saltpeter works office, using the resistography technique. Additional studies of ultrasound and xylohigrometry were also developed. The obtained results establish that the reduction of the dimensions of the evaluated elements does not present significant difference and that there are no deep damages in the woods. The study confirms that the building is not at risk.La torre de lixiviación se encuentra ubicada en la oficina salitrera Santa Laura en Chile. En los últimos años se han realizado estudios, mediante Técnicas No Destructivas (TND), los que han determinado que la torre se encuentra en buen estado. No obstante, existen dudas respecto a las reales dimensiones de los elementos constructivos afectados por el desfibrado. El presente estudio tuvo como objetivo evaluar elementos de madera desfibrada, de la torre de lixiviación de la oficina salitrera Santa Laura, mediante la técnica de resistografía. Estudios adicionales de ultrasonido y xilohigrometría también fueron desarrollados. Los resultados obtenidos establecen que la disminución de las dimensiones de los elementos evaluados no presenta diferencia significativa y que no existen daños profundos en las maderas. El estudio confirma que el edificio no se encuentra en riesgo