cas 12017-68-4, Samarium cobalt | Articles data

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Electrodeposition of Sm-Co nanoparticles from aqueous solutions
Supported Sm-Co nanoparticles have been synthesized by short pulse electrodeposition using aqueous solutions containing glycine as complexant and buffering agent. Nanoparticle composition is a function of pulse amplitude and pulse duration. Short pulses in particular minimize oxygen incorporation, down to 3 at%. X-ray photoelectron spectroscopy and X-ray diffraction data support the hypothesis that metallic alloys have indeed been obtained by this technique, along with mixed oxides of the metals. In-plane coercivities of up to 5.3 kOe have been achieved in as-plated nanoparticle assemblies when the relative Sm content was about 20 at% and particle size around 80 nm. These Sm-Co nanoparticles hold the promise to be a practical and inexpensive material for use in the synthesis of permanent magnets by powder processing.
Zhang, Jianqi,Evans, Paul,Zangari, Giovanni
p. 89 - 94
(2004)
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Structure and magnetic properties of mechanically alloyed SmxCo1-x
A study of the phase structure and magnetic properties of mechanically alloyed and heat-treated SmxCo1-x with x=0.13 to 0.24 has been carried out. Remanence enhancement above 0.5 Ms(Ms=saturation magnetisation) was found in samples with x=0.12 to 0.17 after annealing at 700 °C. A maximum energy product of 16.6 M G Oe was measured for Sm0.13Co0.87. Coercive forces above 50 kOe were obtained for x=0.17-0.20 after heat treatment at approximately 800 °C. The highest value of 57 kOe was measured for Sm0.19Co0.81.
Ding,McCormick,Street
p. 197 - 201
(1993)
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Ternary system Sm-Co-Zr isoplethic section at Co = 89 at.%
A knowledge of solid-liquid equilibria is necessary to optimise sintering temperature in industrial Sm2Co17-type magnets. A single-phase state is reported as precursor of the cellular microstructure of the Sm2Co17 permanent magnets. The formation of this phase at high temperature seems for a large part to be governed by Zr addition. In order to understand the behaviour of 2:17-type magnets, phase relationships have been investigated in the Co-rich field of the Sm-Co-Zr system. The 1150°C isothermal section has been reinvestigated. A two-phase region was observed involving hexagonal and rhombohedral Sm2Co17. An isoplethic section has been drawn for temperatures between 1150°C and the melting points of the alloy with Co = 89 at.%, (Sm + Zr) = 11 at.%. Two four-phase equilibria have been observed. A tentative polythermal representation of the Sm-Co-Zr system in the Co-rich field has been drawn.
Lefevre,Cataldo,Cohen-Adad,Allibert,Valignat
p. 210 - 215
(1996)
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