Nanostructured intermetallics prepared by dealloying from single crystal nickel-based superalloys

被引：14
|
作者：
Li, Y. N. [1 ]
Xi, Z. P. [1 ]
Kang, X. T. [1 ]
Tang, H. P. [1 ]
Zhang, W. Y. [1 ]
Zhang, J. [1 ]
Li, G. Z. [1 ]
机构：
[1] NW Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Shaanxi, Peoples R China
来源：
INTERMETALLICS | 2009年 / 17卷 / 12期
关键词：
Nickel alumindes; based on NiAl; Nanostructured intermetallics; Creep; Eletrochemical characterization; AG THIN-FILMS; METALLIC-GLASS; GOLD CATALYST; CO OXIDATION; MEMBRANES; AU;
D O I：
10.1016/j.intermet.2009.05.006
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：
Two-nanostructure intermetallics (nanoporous film and nanocube) on single crystal nickel-based superalloys were fabricated by electrochemical dealloying in an aqueous electrolyte containing 1 wt% (NH4)(2)SO4 and 1 wt% citric acid solution respectively. Electrochemical properties of two phases in single crystal nickel-based superalloys are different, and it has been utilized to dissolve preferentially gamma matrix phase and gamma' phase remains passive. The electrochemical corrosion behavior of a Ni-based superalloy after high temperature creep was investigated using an EG&G PAR M273 potentiostat. The results indicated that the microstructure after high temperature creep determined the morphology of the resultant gamma' phase intermetallics after dealloying. The morphologies and structure of nanoporous film and nanocube were characterized using a JSM-6700 (Japan) field emission scanning electron microscope (FE-SEM) and JEM-3010 high resolution transmission electron microscopy (HRTEM). Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1065 / 1069
页数：5
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