On the correlation between solidified microstructures and liquid structural states in Bi-40 wt%Te alloy

被引：1

作者：

Huang, Zhong-Yue ^{[1
]}

Xi, Yun ^{[1
]}

Zu, Fang-Qiu ^{[1
]}

Li, Xian-Fen ^{[1
]}

Ding, Guo-Hua ^{[1
]}

Chen, Jie ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Liquid Solid Met Proc Inst, Hefei 230009, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 2009年 / 311卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Liquid-liquid structure transition; Peritectic reaction; Solidification; Bi-Te alloy; ELECTRICAL-RESISTIVITY; PB; SN; GROWTH;

D O I：

10.1016/j.jcrysgro.2009.06.046

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The compound-forming alloy Bi-40wt%Te was selected to explore effects of the temperature-induced liquid-liquid structure transition (TI-LLST) on solidification. The resistivity-temperature pattern of the molten alloy suggested that an irreversible TI-LLST occurred from 694.6 to 723.2 degrees C as temperature elevated. When solidified from the melt undergoing the TI-LLST, the solidification undercooling of the primary phase Bi2Te3 was enlarged and its growth manner was obviously changed, resulting in the spirally curling refined branches, contrary to the orientated thick rod-like crystals solidified from the melt failed to undergo the TI-LLST. Moreover, the volume fraction of the peritectic phase increased from 30.6% to 56.4%, which implied that the phase competition behavior during the peritectic reaction was also changed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：4129 / 4133

页数：5

共 26 条

[11] Energy dispersive X-ray diffraction on undercooled metallic melts
Notthoff, C
Franz, H
Hanfland, M
Herlach, DM
Holland-Moritz, D
Jacobs, G
Lippok, R
Petry, W
Platzek, D
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1999, 250 : 632 - 636
[12] PREDEL B, 1975, Z METALLKD, V66, P347
[13] Ubbelohde A.R., 1978, The molten state of matter: melting and crystal structure
[14] Condensed-matter physics - Thermopower to the people
Vining, CB
[J]. NATURE, 2003, 423 (6938) : 391 - 392
[15] Grain refinement of Al-Si alloy (A356) by melt thermal treatment
Wang, J
He, SX
Sun, BD
Guo, QX
Nishio, M
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2003, 141 (01) : 29 - 34
[16] Effects of melt thermal treatment on hypoeutectic Al-Si alloys
Wang, J
He, SX
Sun, BD
Li, K
Shu, D
Zhou, YH
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 338 (1-2): : 101 - 107
[17] Discontinuous structural phase transition of liquid metal and alloys (1)
Wang, L
Bian, XF
Liu, JT
[J]. PHYSICS LETTERS A, 2004, 326 (5-6) : 429 - 435
[18] Xi Y, 2005, KOVOVE MATER, V43, P432
[19] Flower-like nanostructure and thermoelectric properties of hydrothermally synthesized La-containing Bi2Te3 based alloys
Zhang, Y. H.
Zhu, T. J.
Tu, J. P.
Zhao, X. B.
[J]. MATERIALS CHEMISTRY AND PHYSICS, 2007, 103 (2-3) : 484 - 488
[20] X-ray diffraction experiments on In30Sn70 from normal liquid to solidus
Zhao, Yan
Bian, Xiufang
Qin, Xubo
Qin, Jingyu
Hou, Xiaoxia
[J]. PHYSICS LETTERS A, 2006, 356 (4-5) : 385 - 391

← 1 2 3 →