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Artículo
Nanocrystalline Al Composites from Powder Milled under Ammonia Gas Flow
(Hindawi Publishing Corporation, 2014)
The production of high hardness and thermally stable nanocrystalline aluminium composites is described. Al powder was milled at room temperature in an ammonia flow for a period of less than 5 h. NH3 dissociation during ...
Artículo
El Técnico de Prevención como profesión regulada (I)
(2014)
Con la aprobación del Real Decreto 1837/2008, se incluyeron entre las profesiones reguladas en España dos nuevas profesiones para el desempeño de las funciones preventivas de nivel intermedio y superior. ...
Artículo
Effect of tantalum content on the microstructure and mechanical behavior of cermets based on (TixTa1-x)(C0.5N0.5) solid solutions
(Elsevier, 2014)
Titanium-tantalum carbonitride, (Ti, Ta)(C, N), based cermets with different Ti and Ta contents were prepared using a mechanically induced self-sustaining reaction and then densified using a pressureless sintering process. ...
Artículo
Estimating of bootstrap confidence intervals for freight transport matrices
(Elsevier, 2014)
Freight transport studies require, as a preliminary step, a survey to be conducted on a sample of the universe of agents, vehicles and/or companies of the transportation system. The statistical reliability of the data ...
Artículo
Processing and characterisation of cermet/hardmetal laminates with strong interfaces
(Elsevier, 2014)
Cemented carbides and cermets are potential materials for high speed machining tools. However, cemented carbides are not chemically stable at high temperature and cermets present poor fracture toughness. Novel cermet/hardmetal ...
Artículo
Designing, processing and characterisation of titanium cylinders with graded porosity: An alternative to stress-shielding solutions
(Elsevier, 2014)
Bone resorption events and consequent failure of titanium implants are frequently related to stress-shielding problems, due to stiffness mismatch with respect to bone. This is a mechanical incompatibility problem, which ...
Artículo
El Técnico de Prevención como profesión regulada. Propuesta de titulación oficial (II)
(2014)
El panorama académico debe cambiar, la profesión necesita un reconocimiento. En esta segunda parte se expone dos posibles alternativas que proponen los autores, por una parte la creación de una Titulación de Grado y por ...
Artículo
Enhanced oxidation resistance of Ti(C,N)-based cermets containing Ta
(Elsevier, 2014)
(TixTa1-x)(C0.5N0.5)-Co-based cermets with various Ta contents (x=0, 0.01, 0.05, 0.1 and 0.2) were oxidized at 900°C for 48h in static air. A parabolic rate law, which is indicative of the formation of a protective oxide ...