【摘要】 用机械合金化(MA)法制备不同成分的铁-铬-碳三元合金粉末,并用X射线衍射、穆斯堡尔谱分析了材料在MA过程中的固态相变、晶粒晶化及磁性变化。结果表明:粉末晶粒减小导致穆斯堡尔谱峰形宽化,内磁场分布(HFD)减小,碳元素可以促进Fe3C为主的碳化物析出,铬元素使粉末更趋向于非晶态转变,并使材料出现超顺磁现象。更多还原

【Abstract】 Fe-Cr-C alloy powders were synthesized by mechanical alloying（MA）.Solid state phase transformation,grain refining and magnetism variation during MA were analyzed by X-ray diffraction（XRD） and Mssbauer spectroscopy.The decrease of powder particle size caused Mssbauer peaks to be broadened and hyperfine field distribution（HFD） dimished.Carbon could promote the formation of Fe₃C.With the increase of chromium,the structure of powders could be changed from crystalline to amorphous state easily.In addition,super-magnetic phenomenon also occured.更多还原