Thesis Collection
Last Deposit
Browsing by Author "Astacio, Raquel"
Now showing items 1-9 of 9
-
A Method to Determine the Electrical Resistance of a Metallic Powder Mass under Compression
Montes Martos, Juan Manuel; Gómez Cuevas, Francisco de Paula
; Ternero Fernández, Fátima; Astacio, Raquel; Sánchez Caballero, Eduardo; Cintas Físico, Jesús (MDPI, 2017)
In this paper, a phenomenological model to predict the value of the electrical resistance of a compressed metal powder mass is proposed. The model, based on the experimental compressibility and resistivity-porosity curves, ... -
Consolidation of iron powder by electrical discharge
Aranda Louvier, Rosa María; Ternero Fernández, Fátima; Astacio, Raquel; Urban, Petr; Gómez Cuevas, Francisco de Paula (Elsevier, 2022-07-25)
Capacitor electrical discharge consolidation (CEDC) is a technique that uses the heat of the Joule effect of a high intensity electric current to consolidate powders. In this study, the effect of the precompaction pressure ... -
Crystallization Process and Microstructural Evolution of Melt Spun Al-RE-Ni-(Cu) Ribbons
Gómez Cuevas, Francisco de Paula; Lozano Pérez, Sergio; Aranda Louvier, Rosa María; Astacio López, Raquel (MDPI, 2020-03)
The crystallization process, both at the initial and subsequent stages, of amorphous Al88-RE4-Ni8 alloys (RE = Y, Sm and Ce) has been studied. Additionally, the consequences of adding 1 at.% Cu replacing Ni or Al were ... -
Hard Metal Production by ERS: Processing Parameter Roles in Final Properties
Gallardo, José María; Agote, Iñigo; Astacio, Raquel; Gómez Cuevas, Francisco de Paula (MDPI, 2019-02)
Cemented carbide is a hard composite material, used widely in a variety of industries. The value of the global tungsten carbide market is expected to grow by 4.4% (compound annual growth rate) from 2017 to 2022. One of ... -
In Situ Synthesis of Al-Based MMCs Reinforced with AlN by Mechanical Alloying under NH3 Gas
Caballero, Eduardo S.; Gómez Cuevas, Francisco de Paula; Ternero Fernández, Fátima; Astacio, Raquel; Montes Martos, Juan Manuel; Cintas Físico, Jesús (MDPI, 2018)
Aluminum matrix composites (AMCs) reinforced by aluminum nitride were prepared by mechanical alloying followed by a simple press and sintering method. Milling began under vacuum and after a period of between 1 and 4 h, ... -
Influence of Processing Parameters on the Conduct of Electrical Resistance Sintering of Iron Powders
Astacio, Raquel; Sánchez Caballero, Eduardo; Gómez Cuevas, Francisco de Paula; Montes Martos, Juan Manuel; Ternero Fernández, Fátima (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 ... -
Medium-Frequency Electrical Resistance Sintering of Oxidized C.P. Iron Powder
Montes Martos, Juan Manuel; Gómez Cuevas, Francisco de Paula; Ternero Fernández, Fátima; Astacio, Raquel; Sánchez Caballero, Eduardo; Cintas Físico, Jesús (MDPI, 2018-06)
Commercially pure (C.P.) iron powders with a deliberate high degree of oxidation were consolidated by medium-frequency electrical resistance sintering (MF-ERS). This is a consolidation technique where pressure, and heat ... -
Medium-Frequency Electrical Resistance Sintering of Soft Magnetic Powder Metallurgy Iron Parts
Astacio, Raquel; Ternero Fernández, Fátima; Cintas Físico, Jesús; Gómez Cuevas, Francisco de Paula; Montes Martos, Juan Manuel (MDPI, 2021)
The fabrication of soft magnetic Fe parts by the medium-frequency electrical resistance sintering (MF-ERS) technique is studied in this paper. This consolidation technique involves the simultaneous application to metallic ... -
Production of Ultrafine Grained Hardmetals by Electrical Resistance Sintering
Cintas Físico, Jesús; Astacio, Raquel; Gómez Cuevas, Francisco de Paula; Montes Martos, Juan Manuel; Weissgaerber, Thomas; Lagos, Miguel Ángel; Torres, Yadir; Gallardo, José María (MDPI, 2019)
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 ...
