Oxidation behavior of sputtered Ni-3Cr-20Al nanocrystalline coating

被引：21
作者：
Chen, GF [1 ]
Lou, HY [1 ]
机构：
[1] Acad Sinica, Inst Corros & Protect Met, State Key Lab Corros & Protect, Shenyang 110015, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 271卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
oxidation; Ni-3Cr-20Al; magnetron sputtering; nanocrystalline;
D O I：
10.1016/S0921-5093(99)00258-0
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The oxidation behavior of cast Ni-3Cr-20Al (at%) alloy and its sputtered nanocrystalline coating were investigated at 1000 degrees C in air. Owing to the formation of the transient gamma-Al2O3, theta-Al2O3 in the initial oxidation period, the mass gains were very rapid. With the transformation of the transition Al2O3 to stable alpha-Al2O3 the oxidation kinetics became nearly flat. alpha-Al2O3 and NiAl2O4 were both formed on the sputtered Ni-3Cr-20Al coating after 200-h oxidation. The formation of NiAl2O4 was probably related to the formation of Ni3Al during the oxidation process. The formation mechanism of NiAl2O4 is discussed. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：360 / 365
页数：6
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