Analysis of the Glass-Forming Ability of Fe–Er Alloys, Based on Thermodynamic Modeling
作者:N. A. Arutyunyan、A. I. Zaitsev、S. F. Dunaev、K. B. Kalmykov、D. D. El’nyakov、N. G. Shaposhnikov
DOI:10.1134/s0036024418050035
日期:2018.5
diagram and thermodynamic properties of all its phases are assessed by means of self-consistent analysis. To refine the data on phase equilibria in the Fe–Er system, an investigation is performed in the 10–40 at % range of Er concentrations. The temperature–concentration dependences of the thermodynamic properties of a melt are presented using the model of ideal associated solutions. Thermodynamic parameters
The Er–{Fe,Co}–{Ti,V} systems and hydrogenation properties of the ErFe2−xMx (M=Ti, V, Cr, Mn, Co, Ni, Cu, Mo) alloys
作者:B. Kotur、О. Мyakush、I. Zavaliy
DOI:10.1016/j.jallcom.2007.01.126
日期:2007.9
phase diagrams of the Er–Fe,Co}–Ti,V} systems have been investigated by means of X-ray analysis. Existence of the Er M 12 − x M ′ x (M = Fe, Co; M′ = Ti, V) ternary compounds (ThMn 12 structure type, space group I 4/ mmm ) have been confirmed and their homogeneity ranges were determined. Formation of the ErM 2 -based solid solutions Er M 2 − x M ′ x (MgCu 2 structure type, space group Fd -3 m ) was
摘要 已经通过 X 射线分析研究了 Er-Fe,Co}-Ti,V} 系统相图的等温截面。Er M 12 - x M ' x (M = Fe, Co; M' = Ti, V) 三元化合物(ThMn 12 结构类型,空间群I 4/ mmm )的存在已被证实,并确定了它们的均质范围。观察到基于ErM 2 的固溶体Er M 2 - x M ' x (MgCu 2 结构类型,空间群Fd -3 m )的形成。已经研究了 ErFe 2- x M x (M = Ti、V、Cr、Mn、Co、Ni、Cu、Mo) 合金的吸氢。
Magnetic and magnetocaloric properties of Er(Co 1− x Fe x ) 2 intermetallic compounds
作者:I. Chaaba、S. Othmani、S. Haj-Khlifa、P. de Rango、D. Fruchart、W. Cheikhrouhou-Koubaa、A. Cheikhrouhou
DOI:10.1016/j.jmmm.2017.05.033
日期:2017.10
magnetic and magnetocaloric properties of Er(Co 1− x Fe x ) 2 ( x = 0.0, 0.125 and 1) compounds are investigated. X-ray diffraction (XRD) analysis has revealed that the compounds crystallize in the C15 type Laves phase structure, with Fd-3m space group . All the samples are ferrimagnetically ordered, exhibiting a compensation point in the M(T) traces for x = 1. The substitution of Fe to Co is accompanied
摘要 研究了 Er(Co 1− x Fe x ) 2 ( x = 0.0, 0.125 和 1) 化合物的结构、磁性和磁热特性。X 射线衍射 (XRD) 分析表明,该化合物以 C15 型 Laves 相结构结晶,具有 Fd-3m 空间群。所有样品都是亚铁磁性有序的,在 x = 1 的 M(T) 轨迹中表现出补偿点。 Fe 对 Co 的替代伴随着居里温度从 42 增加到 591 K,x 从 0 到1. 磁热效应 (MCE) 根据基于等温磁化测量的麦克斯韦关系进行预测。最大|ΔS M | 在 0-5 T 的外加磁场变化下,发现值从 x = 0 的 21 J.kg -1 .K -1 下降到 x = 1 的 1.5 J.kg -1 .K -1。
Hydrogen-induced amorphization in C15 Laves phases RFe2
作者:M. Dilixiati、K. Kanda、K. Ishikawa、K. Aoki
DOI:10.1016/s0925-8388(01)01923-5
日期:2002.5
Abstract C15Lavesphases RFe2 (R=Y, Ce, Sm, Gd, Tb, Dy, Ho and Er) were thermally analyzed to elucidate the conditions of hydrogen-inducedamorphization (HIA) using a pressure differentialscanning calorimeter (PDSC) in a hydrogen atmosphere. Hydrogen absorption in the crystalline state, hydrogen-inducedamorphization (HIA), precipitation of RH2 and decomposition of the remaining amorphous phase into
The standard enthalpies of formation of some binary intermetallic compounds of lanthanide–iron systems by high temperature direct synthesis calorimetry
作者:S.V. Meschel、P. Nash、Q.N. Gao、J.C. Wang、Y. Du
DOI:10.1016/j.jallcom.2012.11.035
日期:2013.3
formation of some binary and ternary shape memory alloys, which have established technological application, have also been measured. These are: Terfenol-D (−1.5 ± 3.1), Samfenol (−13.6 ± 3.1), Galfenol (−10.4 ± 2.8); Nd 2 Fe 14 B (−9.6 ± 3.2). The values are compared with predicted values of the semiempirical model of Miedema and Coworkers and with predictions by ab initio calculations. We will present
摘要 通过高温直接合成量热法在 1373 ± 2 K 下测量了一些镧系元素-铁系金属间化合物的标准生成焓。 报告了以下以 kJ/mole 原子为单位的结果: Ce 2 Fe 17 (-1.6 ± 2.8); Pr 2 Fe 17 (-0.2 ± 3.0);Nd 2 Fe 17 (-3.0 ± 2.7);Sm 2 Fe 17 (-3.1 ± 3.2);GdFe 2 (-2.4±3.0);HoFe 2 (-2.6 ± 3.3);ErFe 2 (-1.9 ± 3.0);TmFe 2 (-2.2 ± 2.8);LuFe 2 (-3.6 ± 3.1)。一些已确立技术应用的二元和三元形状记忆合金的标准形成焓也已被测量。它们是:Terfenol-D (-1.5 ± 3.1)、Samfenol (-13.6 ± 3.1)、Galfenol (-10.4 ± 2.8);Nd 2 Fe 14 B (-9.6 ±