Buscar
Mostrando ítems 1-10 de 26
Ponencia
Use of Urea and Ammonia to Produce High-Strength PM Aluminium Parts
(European Powder Metallurgy Association (EPMA), 2011)
Two methods to obtain bulk nanostructured aluminium parts are compared. The first one consists on milling Al powder in an ammonia gas atmosphere. In the second method, the Al powder is milled in vacuum with the addition ...
Artículo
Fracture toughness of cemented carbides obtained by electrical resistance sintering
(Elsevier, 2019)
The unique combination of hardness, toughness and wear resistance exhibited by WC-Co cemented carbides (hardmetals) has made them a preeminent material choice for extremely demanding applications, such as metal cutting/forming ...
Artículo
Influence of processing parameters on the conduct of electrical resistance sintering of iron powders
(MDPI, 2020-04)
The influence of the applied pressure and electrical parameters on the macrostructure of specimens consolidated by the medium-frequency electrical resistance sintering technique (MF-ERS) is analysed in this work. This ...
Artículo
Production of Ultrafine Grained Hardmetals by Electrical Resistance Sintering
(MDPI, 2019-02)
In this work, powders of cemented ultrafine WC-6 wt.% Co were consolidated. The feasibility of the medium frequency electrical resistance sintering (MF-ERS) technique were studied to prevent WC grain growth during ...
Artículo
Modelling and Simulation of the Electrical Resistance Sintering Process of Iron Powders
(Korean Institute of Metals and Materials, 2020-07)
In this paper, the process known as Electrical Resistance Sintering under Pressure is modelled, simulated and validated. This consolidation technique consists of applying a high-intensity electrical current to a metallic ...
Artículo
Influence of Milling Atmosphere on the Controlled Formation of Ultrafine Dispersoids in Al-Based MMCs
(MDPI, 2016)
Properties of compacts made from aluminium powder, milled under different atmospheres, were evaluated. The duration of all the milling processes was 10 h, although different atmospheres were tested: vacuum, confined ...
Artículo
Nickel Porous Compacts Obtained by Medium-Frequency Electrical Resistance Sintering
(MDPI, 2020-05)
A commercially pure (c.p.) nickel powder was consolidated by Medium-Frequency Electrical Resistance Sintering (MF-ERS). In this consolidation technique, a pressure and the heat released by a high-intensity and low-voltage ...
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 ...
Patente
Procedimiento de fabricación de material metálico de alta porosidad en condiciones de imponderabilidad
(Oficina Española de Patentes y Marcas , 2014-10-13)
Esta invención propone un nuevo procedimiento de fabricación de material metálico de alta porosidad, partiendo de una masa de polvos en condiciones de imponderabilidad. La consolidación de la estructura particular se realiza ...
Tesis Doctoral
MMCS de aluminio nanoestructurado obtenidos mediante molienda en flujo de amoniaco gaseoso.
(2014-02-20)
Es un hecho que la nanotecnología y, en general, los procesos relacionados con nanoestructuras, puede aportar soluciones novedosas en muy diversas aplicaciones de la actividad humana. De ahí el interés de la investigación ...