TY - GEN
T1 - Effects of milling time on structural and magnetic properties of Cu10wt%Co15wt%Nb3sn Alloys consolidated by hot pressing
AU - López, Marta
AU - Jiménez, José
AU - Gómez, Jennifer
AU - Ramam, Koduri
AU - Mangalaraja, Ramalinga V.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85067717957&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85067717957
T3 - International Powder Metallurgy Congress and Exhibition, Euro PM 2013
BT - International Powder Metallurgy Congress and Exhibition, Euro PM 2013
PB - European Powder Metallurgy Association (EPMA)
T2 - International Powder Metallurgy Congress and Exhibition, Euro PM 2013
Y2 - 15 September 2013 through 18 September 2013
ER -