Mechanically alloyed and gas-phase carbonated highly coercive Sm2Fe17Cx
- 20 April 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 60 (16) , 2029-2031
- https://doi.org/10.1063/1.107108
Abstract
Microcrystalline Sm2Fe17Cx powders with high carbon content (x≊2) were prepared by mechanical alloying and a subsequent solid‐gas reaction in acetylene atmosphere to introduce carbon atoms interstitially into the 2:17 lattice. Such processing results in magnetically isotropic material with a room‐temperature coercivity of up to 18.5 kA/cm (23.2 kOe) and a maximum energy product of 59 kJ/m3 (7.4 MGOe). It is unstable at high temperatures and decomposes into the equilibrium phases SmC and α‐Fe upon heating to 700 °C in vacuum.Keywords
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