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Mostrando ítems 31-40 de 96
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
Strength and reliability of WC-Co cemented carbides: Understanding microstructural effects on the basis of R-curve behavior and fractography
(Elsevier, 2018)
Strength and reliability of WC-Co cemented carbides (hardmetals) are dependent on effective fracture toughness as well as on nature, size and distribution of processing flaws. Regarding toughness, they exhibit a crack ...
Artículo
Dos décadas de formación superior en prevención como Enseñanzas Propias de la Universidad de Sevilla en la Escuela Politécnica Superior
(Universidad de Sevilla. Centro de Formación Permanente, 2012)
Artículo
Liquid-phase sintering of Ti(C,N)-based cermets. the effects of binder nature and content on the solubility and wettability of hard ceramic phases
(Elsevier, 2013)
Different commercial TiC-TiN/Co/Ni mixtures were used as raw materials for Ti(C,N) cermets, and the effects of the sintering parameters (binder content, binder nature, sintering time and additives) on the final hard ceramic ...
Artículo
Diseño, procesado y caracterización, procesado y caracterización de materiales con porosidad radial controlada para aplicaciones nucleares
(Grupo Español de Fractura, 2015)
Las pastillas de combustible irradiado presentan un gradiente de porosidad radial como consecuencia de la presencia de gas He y otros productos de fisión que modifican su microestructura. El óxido de Cerio, CeO2, ha ...
Artículo
Development of multicomponent-multiphase materials based on (Ti, Ta, Nb)CxN1-x carbonitride solid solutions
(Elsevier, 2012)
A set of powdered cermets based on (Ti,Ta,Nb)C xN 1-x carbonitride solid solutions were synthesized from mixtures of elemental powders by a mechanically induced self-sustaining reaction (MSR) method and subsequently sintered ...
Artículo
Absence of the core–rim microstructure in TixTa1 − xCyN1 − y-based cermets developed from a pre-sintered carbonitride master alloy
(Elsevier, 2012)
(Ti,Ta)(C,N) solid solution-based cermets with cobalt as the binder phase were synthesised by a two-step milling process. The titanium–tantalum carbonitride solid solution (the ceramic phase) was obtained via a mechanically ...
Artículo
Spark plasma sintering of TixTa1-xC0.5N0.5-based cermets: Effects of processing conditions on chemistry, microstructure and mechanical properties
(Elsevier, 2013)
Nanometric powdered TixTa1-xC0.5N0.5-based cermets were fabricated using a mechanically induced self-sustaining reaction and consolidated by spark plasma sintering. Highly dense cermets were obtained, and their chemistry, ...
Artículo
Porous Titanium for Biomedical Applications: Evaluation of the Conventional Powder Metallurgy Frontier and Space-Holder Technique
(MDPI, 2019)
Titanium and its alloys are reference materials in biomedical applications because of their desirable properties. However, one of the most important concerns in long-term prostheses is bone resorption as a result of the ...
Artículo
Effect of sintering time on the microstructure and mechanical properties of (Ti,Ta)(C,N)-based cermets
(Elsevier, 2013)
Complete solid-solution cermets based on titanium-tantalum carbonitride using a starting nominal composition with 80 wt.% of (Ti0.8Ta 0.2)(C0.5N0.5) and 20 wt.% of Co were performed by pressure-less sintering at 1550 C for ...