Elemental separation in nanocrystalline Cu-Al alloys

被引：18

作者：

Wang, Y. B. ^{[1
]}

Liao, X. Z. ^{[1
]}

Zhao, Y. H. ^{[2
]}

Cooley, J. C. ^{[3
]}

Horita, Z. ^{[4
]}

Zhu, Y. T. ^{[5
]}

机构：

[1] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[2] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China

[3] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

[4] Kyushu Univ, WPI, Int Inst Carbon Neutral Energy Res WPI I2CNER, Fukuoka 8190395, Japan

[5] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 23期

基金：

澳大利亚研究理事会;

关键词：

HIGH-PRESSURE TORSION; SEVERE PLASTIC-DEFORMATION; PHASE-TRANSFORMATION; IMMISCIBLE ELEMENTS; GRAIN-SIZE; AMORPHIZATION; DECOMPOSITION; BOUNDARIES; COPPER;

D O I：

10.1063/1.4811157

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanocrystallization by high-energy severe plastic deformation has been reported to increase the solubility of alloy systems and even to mix immiscible elements to form non-equilibrium solid solutions. In this letter, we report an opposite phenomenon-nanocrystallization of a Cu-Al single-phase solid solution by high-pressure torsion separated Al from the Cu matrix when the grain sizes are refined to tens of nanometers. The Al phase was found to form at the grain boundaries of nanocrystalline Cu. The level of the separation increases with decreasing grain size, which suggests that the elemental separation was caused by the grain size effect. (C) 2013 AIP Publishing LLC.

引用

页数：5

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