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以五羰基铁和四羰基镍为前驱体，使它们在高温下热解并通过自合金化过程制备出抗氧化性能强的粒度为５０ｎｍ的羰基γ－（Ｆｅ，Ｎｉ）超细微粒，Ｘ射线能量色散谱（ＥＤＳ）的定量分析表明，其Ｆｅ、Ｎｉ的原子含量约为Ｆｅ４０％、Ｎｉ６０％，透射电镜分析表明粒度为５０ｎｍｎ的颗粒是由粒度只有几个ｎｍ的更小的颗粒所组成，并测量了颗粒的磁性能。
With iron pentacarbonyl and nickel tetracarbonyl as precursors, they were pyrolyzed at high temperature and were prepared by auto-alloying to produce carbonyl γ- (Fe, Ni) ultrafine particles of 50nm with high oxidation resistance. X-ray Quantitative analysis of energy dispersive spectroscopy (EDS) showed that the atomic contents of Fe and Ni were about 40% Fe and 60% Ni. Transmission electron microscopy showed that the particles with a size of 50 nm were composed of smaller particles with a size of only a few nm, The magnetic properties of the particles were measured.