ALCHEMI study of site distributions of 3d-transition metals in B2-ordered iron aluminides

被引：49

作者：

Anderson, IM

机构：

[1] Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831

来源：

ACTA MATERIALIA | 1997年 / 45卷 / 09期

关键词：

D O I：

10.1016/S1359-6454(97)00042-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ALCHEMI has been used to determine the site distributions of the 3d-transition metals Me = {Ti, V, Cr, Mn, Co, Ni, Cu} in B2-ordered iron aluminides of stoichiometry Fe50Al45Me5. These alloying additions exhibited an increasing 'Fe'-site preference with increasing atomic number. Elements Co, Ni and Cu were found to occupy the 'Fe' site exclusively, displacing 10% of the Fe host element to the 'Al' anti-site. None of the alloying elements exhibited an exclusive 'Al' site preference. The element Ti exhibited the largest 'Al'-site occupancy, with similar to 85% of the alloying element occupying the 'Al' site. The residual 'Fe'-site occupancy (15%) can be attributed to the kinetics of the site-equilibration mechanism. (C) 1997 Acta Metallurgica Inc.

引用

页码：3897 / 3909

页数：13

共 26 条

[21] ALCHEMI - A NEW TECHNIQUE FOR LOCATING ATOMS IN SMALL CRYSTALS [J].

SPENCE, JCH ;

TAFTO, J .

JOURNAL OF MICROSCOPY-OXFORD, 1983, 130 (MAY) :147-154

[22]

SPENCE JCH, 1986, MATER RES SOC S P, V62, P153

[23] A FORMULATION OF ALCHEMY FOR MATERIALS CONTAINING LIGHT-ELEMENTS [J].

WALLS, MG .

MICROSCOPY MICROANALYSIS MICROSTRUCTURES, 1992, 3 (05) :443-451

[24]

WALLS MG, 1993, J PHYSIQUE, V4, P2155

[25] OPTIMIZATION OF THE BORON CONTENT IN FEAL (40-ATMOSPHERIC-PERCENT AL) ALLOYS [J].

WEBB, G ;

JULIET, P ;

LEFORT, A .

SCRIPTA METALLURGICA ET MATERIALIA, 1993, 28 (07) :769-772

[26] STRUCTURAL, ELECTRONIC, AND MAGNETIC-PROPERTIES OF 3D TRANSITION-METAL ALUMINIDES WITH EQUIATOMIC COMPOSITION [J].

ZOU, J ;

FU, CL .

PHYSICAL REVIEW B, 1995, 51 (04) :2115-2121

← 1 2 3 →