Dealloying of an Au-based amorphous alloy

被引：32

作者：

Scaglione, Federico ^{[1
,2
]}

Gebert, Annett ^{[3
]}

Battezzati, Livio ^{[1
,2
]}

机构：

[1] Univ Turin, Dipartimento Chim, IFM, I-10125 Turin, Italy

[2] Univ Turin, Ctr Eccellenza NIS, I-10125 Turin, Italy

[3] Leibniz Inst Solid State & Mat Res IFW Dresden, D-01171 Dresden, Germany

来源：

INTERMETALLICS | 2010年 / 18卷 / 12期

关键词：

Glasses; metallic; Phase interfaces; Corrosion behaviour; STRESS-CORROSION CRACKING; NANOPOROUS GOLD; ANODIC-DISSOLUTION;

D O I：

10.1016/j.intermet.2010.08.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The dealloying behaviour of Au42Cu29Ti8Si21 and Au44Cu31Ti4Si21 amorphous (wheel-side) and partially crystalline (air-side) ribbons was investigated using potentiostatic and galvanostatic etching. The resulting microstructures are: i) on the wheel-side homogeneous porosity with size from tens of nanometers to less than 1 pm in between Au crystals is largely found, ii) on the air-side the porosity occurs on two length-scales, submicrometer as on the opposite size and micrometer where crystals are removed. The importance of surface morphology in the formation of the microstructure is outlined. The role of diffusion and nucleation in the mechanism of surface gold enrichment is established. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2338 / 2342

页数：5

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