The Technological Institute of Saltillo , or ITS, is located in the city of Saltillo, state capital of Coahuila, Mexico. It is a college level technological institution. Though founded in July 1950 by Mexican President Miguel Alemán Valdez, it started operations on January 3, 1951. Wikipedia.
Haro-Rodriguez S.,Autonomous University of Zacatecas |
Goytia-Reyes R.E.,Autonomous University of Zacatecas |
Dwivedi D.K.,Indian Institute of Technology Roorkee |
Baltazar-Hernandez V.H.,Autonomous University of Zacatecas |
And 2 more authors.
Materials and Design | Year: 2011
In this paper, the influence of grain refinement (Al-5Ti-1B) and modification (Al-10Sr) on the microstructure, the morphology of iron-containing needle shape beta phase and mechanical properties of cast Al-12Si alloy has been reported. The grain refinement and modification transforms the needle shape morphology of the β-phase into Chinese script. Grain refinement and modification by addition of Ti and Sr respectively increased the quality index (Q) of the casting. Addition of 0.06. wt.% Sr resulted in a best combination of mechanical properties such as ultimate tensile strength and ductility. © 2010 Elsevier Ltd.
Pech-Canul M.I.,CINVESTAV |
Rodriguez-Reyes M.,Saltillo Institute of Technology |
Pech-Canul M.A.,CINVESTAV |
Metals and Materials International | Year: 2011
In this work, SiCP and SiC P/SiO 2 porous preforms were infiltrated without assistance in Ar?N2 atmosphere with the alloy Al-10.3 Mg-12.04 Si (wt.%) at 1050 and 1100 °C, for 20, 40 and 60 min. It was found that a decrease in residual porosity and an increase in elastic modulus by about 22 % with respect to composites produced without SiO 2 additions to the preforms are associated with the formation of magnesium aluminate spinel (MgAl 2O 4). A concurrent increase of the matrix hardness is ascribed to a strengthening mechanism by MgAl 2O 4 formation, similar to the strengthening observed with Mg 2Si in aluminum alloys. Therefore, the spinel can be considered as a co-reinforcement of SiC p in the aluminum matrix composites. Reactions for spinel formation and possible mechanisms for hardness enhancement are outlined. © KIM and Springer.
Deaquino-Lara R.,CIMAV |
Deaquino-Lara R.,CINVESTAV |
Gutierrez-Castaneda E.,CINVESTAV |
Estrada-Guel I.,CIMAV |
And 5 more authors.
Materials and Design | Year: 2014
The modification on the microstructure and mechanical response of some Al7075-graphite composites fabricated by mechanical alloying and hot extrusion were studied as a direct function of milling time (0-10h) and graphite concentration (0-1.5wt.%). The experimental results show that the mechanical properties of the resulting composites are enhanced by increasing both the milling time and the graphite content. This effect is attributed mainly to grain size refining, Al4C3 phase formation and an increase of the dislocation density. The yield strength of the hot-extruded samples varies with grain size according to the Hall-Petch relationship. During the hot-extrusion process, recrystallization of samples milled for 10h occurs faster than in samples with 5h of milling, which is associated to the increase of stored energy in the composites caused by the milling process. © 2013 Elsevier Ltd.
Ruizmoreno R.G.,CINVESTAV |
Ruizmoreno R.G.,Saltillo Institute of Technology |
Martinez A.I.,CINVESTAV |
Castro-Rodriguez R.,CINVESTAV |
Journal of Superconductivity and Novel Magnetism | Year: 2013
Citrate coated magnetite nanoparticles (NPs) were prepared by a modified coprecipitation technique in the presence of sodium citrate and sodium acetate. The citrate coated NPs showed a close particle size distribution, superparamagnetic behavior, and single crystalline nature. Water dispersions of magnetite NPs were analyzed by laser diffraction; this technique revealed that the NPs form micrometer sized aggregates. It was found that the size of the aggregates depends strongly on the time of ultrasonic agitation and the citrate shell. © 2012 Springer Science+Business Media New York.
Valdes-Perezgasga M.T.,Posgrado en Ciencias Agrarias UAAAN UL |
Sanchez-Ramos F.J.,Posgrado en Ciencias Agrarias UAAAN UL |
Garcia-Martinez O.,Saltillo Institute of Technology |
Anderson G.S.,Simon Fraser University
Journal of Forensic Sciences | Year: 2010
This is the first report of an ongoing research to establish a sarcosaprophagous arthropod database in the Coahuilan semidesert. Seven pigs (Sus scrofa L.) were used as human models to determine succession in an open urban area during the 2007 winter-spring period. Arthropods were collected manually and from pitfall traps. Carcass biomass loss, as well as arthropod colonization, was recorded during 71 days postmortem. Five decomposition stages were identified during which most abundant orders were found to be Diptera, Coleoptera, and Hymenoptera. Lucilia sericata (Meigen), Chrysomya rufifacies (Macquart), Necrobia rufipes (DeGeer), Dermestes maculatus (DeGeer), Pheidole hyatti Emery, and Pogonomyrmex rugosus Emery stood out as dominant species. © 2010 American Academy of Forensic Sciences.