|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Materials for Transportation and Lightweighting
||PAN-37: The Effect of Ni on the Structural, Hardness and Magnetic Properties of Cu90-xCo10Nix – 7.5% SmCo5 Composite Alloys Prepared by Powder Metallurgy Route
||Marta Lopez, Mangalaraja Ramalinga Viswanathan, Christopher Salvo, Felipe Sanhueza, Jose Jiménez
|On-Site Speaker (Planned)
Copper composite alloys (Cu90-XCo10NiX-7.5SmCo5, with Nix = 0, 20wt%) were obtained by the powder metallurgy route, by milling Cu90-XCo10NiX and Cu90-XCo10NiX-7.5%SmCo5 in two steps. The X–ray diffraction patterns of both milled powders showed only Cu diffraction peaks which indicated that Co, Ni and SmCo5 were incorporated into the copper crystal lattice to form Cu(Co,Ni) and Cu(Co, Ni, Sm) solid solutions. The final consolidation of the Cu90-xCo10Nix – 7.5% SmCo5 alloy powders by hot pressing under argon atmosphere showed the precipitation of dark micron-nanometric particles inside the copper matrix and a few bright particles, identified as Co(Ni) and Co5O12Sm3 ferromagnetic phases respectively, from the Rietveld refinement of the XRD patters and the electron probe micro analysis. Both particles have a decisive influence on the magnetic properties of Cu90-xCo10Ni20wt%)–SmCo5 alloy due to ferromagnetic behavior mainly of Co(Ni) particles, registering coercive field values between 13607.7 and 26419.6 A/m.
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