Fe, Fe_3C and NdC_2 nanoparticles, encapsulated within carbon cages, were continuously produced during the induction thermal plasma processing of Fe_14Nd_2B, in the presence of methane or acetylene. The product morphology was studied by means of SEM. Further structural details were obtained from TEM, HRTEM, Raman spectroscopy and x-ray powder diffraction studies. The so-produced nanostructures have core-shell structure, with inner cavity diameters varying between 10 and 30 nm. The carbon coatings were composed of between 5 and 25 graphene layers. The carbon cages were built from sp carbon atoms, which protected the encapsulated nanoparticles from both oxidation and agglomeration. The plasma generated products were ferromagnetic, with maximum values of cocrcivity field of 600 G s, and saturation magnetization values of up to 40 emu g~(-1).
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机译：在甲烷或乙炔的存在下，在Fe_14Nd_2B的感应热等离子体处理过程中，连续生产了包裹在碳笼中的Fe，Fe_3C和NdC_2纳米颗粒。通过SEM研究产物的形态。从TEM，HRTEM，拉曼光谱和X射线粉末衍射研究获得了更多的结构细节。如此产生的纳米结构具有核-壳结构，其内腔直径在10至30nm之间变化。碳涂层由5至25个石墨烯层组成。碳笼由sp碳原子构成，可保护封装的纳米颗粒免受氧化和团聚。等离子体产生的产物是铁磁性的，其矫顽力场的最大值为600 G s，饱和磁化强度值为40 emu g〜（-1）。
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