Effects of milling time on structural and magnetic properties of Cu10wt%Co15wt%Nb3sn Alloys consolidated by hot pressing

Marta López, José Jiménez, Jennifer Gómez, Koduri Ramam, Ramalinga V. Mangalaraja

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

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Resumen

In this work, Cu-Co-Nb magnetic composite alloys were obtained by hot-pressing under argon atmosphere of an alloy prepared by mechanical mixing. For the preparation of this powder master alloy, it was mixed 15wt% of intermetallic Nb3Sn, synthesized by mechanical alloying of elemental Nb and Sn and subsequent thermal treatment, and a Cu-10wt%Co solid solution, also prepared by mechanical alloying of elemental Cu and Co. A laboratory mill working at 250 rpm under argon atmosphere during 5 and 10h was used to disperse ultrafine Nb3Sn particles into the copper-10wt%Co matrix. Microstructure of resulting powders and consolidated materials were characterized by means of X-ray diffraction, scanning electron microscopy, and electron micro probe analysis. Magnetic properties and mechanical properties were measured by means of a vibrating sample magnetometer and a durometer, respectively. Fitting of the X-ray diffraction patterns with the Rietveld method, revealed that during the hot pressing process, the Nb3Sn particles reacted with cobalt to form (Co,Sn)2Nb, liberating some Sn that difussed in Cu forming a Cu-Sn solid solution. The influence of the milling time on this structural change and the associated variation of magnetic properties are discussed.

Idioma originalInglés
Título de la publicación alojadaInternational Powder Metallurgy Congress and Exhibition, Euro PM 2013
EditorialEuropean Powder Metallurgy Association (EPMA)
ISBN (versión digital)9781899072408
EstadoPublicada - 2013
Publicado de forma externa
EventoInternational Powder Metallurgy Congress and Exhibition, Euro PM 2013 - Gothenburg, Suecia
Duración: 15 sep. 201318 sep. 2013

Serie de la publicación

NombreInternational Powder Metallurgy Congress and Exhibition, Euro PM 2013

Conferencia

ConferenciaInternational Powder Metallurgy Congress and Exhibition, Euro PM 2013
País/TerritorioSuecia
CiudadGothenburg
Período15/09/1318/09/13

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