Rapid solidification behaviour of undercooled levitated Fe-Ge alloy droplets

被引：26

作者：

Biswas, K

Phanikumar, G ^{[1
]}

Chattopadhyay, K

Volkmann, T

Funke, O

Holland-Moritz, D

Herlach, DM

机构：

[1] Indian Inst Sci, Dept Met, Bangalore 560012, Karnataka, India

[2] German Aerosp Ctr, Inst Space Simulat, Cologne, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 375卷

关键词：

rapid solidification; undercooling; levitation; phase selection; Fe-Ge;

D O I：

10.1016/j.msea.2003.10.047

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The solidification behaviour of Fe82Ge18 and Fe75Ge25 alloys is studied by using an electromagnetic levitation facility. The maximum undercooling attained in the case of Fe82Ge18 alloy is 240K. Growth velocity of alpha-(bcc) phase is measured using a photodiode technique and shows two distinct regimes. In the case of Fe75Ge25, the maximum undercooling attained is 165 K. At low undercoolings two recalescence events occur, corresponding to formation of alpha- and epsilon-phase (DO19). At large undercoolings the peritectic reaction (alpha + liquid --> epsilon) is suppressed. Microstructural analysis indicates morphological changes in the microstructure as well as a competition among phases nucleating at different levels of undercooling. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：464 / 467

页数：4

共 12 条

[1] An in-situ TEM study of the L12 to DO19 phase transformation in the intermetallic compound Fe3Ge [J].

Chen, QZ ;

Ngan, AHW ;

Duggan, BJ .

INTERMETALLICS, 1998, 6 (02) :105-114

[2] MISCIBILITY GAP DUE TO ORDERING IN THE BCC FE-GE SYSTEM [J].

ENOKI, H ;

ISHIDA, K ;

NISHIZAWA, T .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1987, 18 (06) :949-955

[3] Solidification from undercooled melts [J].

Herlach, DM .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 226 :348-356

[4] NONEQUILIBRIUM SOLIDIFICATION OF UNDERCOOLED METALLIC MELTS [J].

HERLACH, DM .

MATERIALS SCIENCE & ENGINEERING R-REPORTS, 1994, 12 (4-5) :177-272

[5]

Karma A, 1998, INT J NON-EQUILIB PR, V11, P201

[6]

Kerr HW, 1996, INT MATER REV, V41, P129, DOI 10.1179/095066096790151231

[7]

MASSALSKI TB, 1986, BINARY ALLOY PHASE D, V2, P1704

[8]

Parrish P.A., 1988, RAPID SOLIDIFICATION, P13

[9]

PREDEL B, 1972, Z METALLKD, V63, P393

[10] ON THE INFLUENCE OF TRICRITICAL POINT ON THE MICROSTRUCTURAL EVOLUTION IN FE-GE SYSTEM [J].

RAVIPRASAD, K ;

RANGANATHAN, S ;

CHATTOPADHYAY, K .

SCRIPTA METALLURGICA ET MATERIALIA, 1992, 26 (03) :467-472

← 1 2 →