Mg segregation at Al/Al3Sc heterophase interfaces on an atomic scale:: Experiments and computations -: art. no. 036101

被引：97

作者：

Marquis, EA

Seidman, DN

Asta, M

Woodward, C

Ozolins, V

机构：

[1] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[3] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.91.036101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Microscopic factors governing solute partitioning in ternary two-phase Al-Sc-Mg alloys are investigated combining three-dimensional-atom-probe (3DAP) miscroscopy measurements with first-principles computations. 3DAP is employed to measure composition profiles with subnanometer-scale resolution, leading to the identification of a large enhancement of Mg solute at the coherent alpha-Al/Al3Sc (fcc/L1(2)) heterophase interface. First-principles calculations establish an equilibrium driving force for this interfacial segregation reflecting the nature of the interatomic interactions.

引用

页数：4

共 22 条

[1]

[Anonymous], ADV ALUMINUM ALLOYS

[2] First-principles calculations of bulk and interfacial thermodynamic properties for fcc-based Al-Sc alloys [J].

Asta, M ;

Foiles, SM ;

Quong, AA .

PHYSICAL REVIEW B, 1998, 57 (18) :11265-11275

[3] Structural, vibrational, and thermodynamic properties of Al-Sc alloys and intermetallic compounds [J].

Asta, M ;

Ozolins, V .

PHYSICAL REVIEW B, 2001, 64 (09)

[4] EQUILIBRIUM SEGREGATION AND INTERFACIAL ENERGY IN MULTICOMPONENT SYSTEMS [J].

DREGIA, SA ;

WYNBLATT, P .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (05) :771-778

[5] Impurity diffusion of scandium in aluminum [J].

Fujikawa, SI .

DEFECT AND DIFFUSION FORUM, 1997, 143 :115-120

[6]

Hellman OC, 2000, MICROSC MICROANAL, V6, P437, DOI 10.1007/s100050010051

[7] KINETICS OF PRECIPITATION IN AL-SC ALLOYS AND LOW-TEMPERATURE SOLID SOLUBILITY OF SCANDIUM IN ALUMINUM STUDIED BY ELECTRICAL-RESISTIVITY MEASUREMENTS [J].

JO, HH ;

FUJIKAWA, SI .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 171 (1-2) :151-161

[8] ABSOLUTE ATOMIC-SCALE MEASUREMENTS OF THE GIBBSIAN INTERFACIAL EXCESS OF SOLUTE AT INTERNAL INTERFACES [J].

KRAKAUER, BW ;

SEIDMAN, DN .

PHYSICAL REVIEW B, 1993, 48 (09) :6724-6727

[9] AB-INITIO MOLECULAR-DYNAMICS SIMULATION OF THE LIQUID-METAL AMORPHOUS-SEMICONDUCTOR TRANSITION IN GERMANIUM [J].

KRESSE, G ;

HAFNER, J .

PHYSICAL REVIEW B, 1994, 49 (20) :14251-14269

[10] Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

PHYSICAL REVIEW B, 1996, 54 (16) :11169-11186

← 1 2 3 →