铁氮化合物Fe_(x)N(x≈2)的穆斯堡尔研究  

Mossbauer Study of Fe_(x)N(x≈2)compound

作　　者：李爱国[1] 蔡英文 曹建清 倪新伯 张桂林[1] 俞钢辉[2] 徐炜新[2] 

机构地区：[1]中国科学院上海原子核研究所核分析开放实验室,上海201800 [2]上海钢铁研究所重点实验室,上海200940

出　　处：《核技术》2000年第12期838-842,共5页Nuclear Techniques

摘　　要：在不同组成比的高纯 Ａｒ和 Ｎ２气氛下，用 ＲＦ溅射纯铁制备成不同含氮量的 ＦｅｘＮ（１．６＜ｘ＜２．２）。用质子深度弹性散射对样品中的Ｆｅ、Ｎ、Ｏ、Ｃ进行分析，Ｘ光电子谱仪用于鉴定铁的氧化程度。采用穆斯堡尔效应测量室温时和经２００、２５０、３００℃退火的样品。对照Ｘ衍射实验结果表明，在铁的化学计量接近２时，随氮气氛的增加，或者经退火处理后，其相结构会从正交结构的 ζ－Ｆｅ２Ｎ向密堆六方结构的。ε－Ｆｅ２Ｎ或准ＺｎＳ相结构转化。在ε－Ｆｅ２Ｎ相中铁原子的第一近邻呈现贫氮或富氮的现象。Under different atmospheric environment composed of pure Ar and N2, a serial of FexN (1.6<x<2.2) samples were made by RF sputtering. Proton depth elastic scattering was adopted to measure Fe, N, O and C, XPS was used to detect the oxidation of iron. Mossbauer spectroscopy was used to analyze the samples as sputtered and annealed after 200℃, 250℃ and 300℃. Combined with X-ray diffraction, the results show that: when the ratio of Fe:N is close to 2, its phase structure will undergo a transition from orthogonal ζ -Fe2N and ε -Fe2N--Fe3N to hcp ε -Fe2N, while the first neighbor of Fe atom may be rich of or lack of N. When the nitrogen content is increased during sputtering, or the samples are annealed, Fe2N phase will transform into quasi-ZnS structure.

关 键 词：铁氮化合物 穆斯堡尔效应 质子深度弹性散射 

分 类 号：O482.54[一般工业技术—材料科学与工程] O481.4[理学—固体物理]