PASSIVITY OF AMORPHOUS AND CRYSTALLINE NI-TI ALLOYS

被引：2
|
作者：
ASAMI, K
CHEN, SC
HABAZAKI, H
KAWASHIMA, A
HASHIMOTO, K
机构：
[1] Institute for Materials Research, Tohoku University, Sendai, 980
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 134卷
关键词：
D O I：
10.1016/0921-5093(91)90916-B
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In dilute sulphuric solution, amorphous and crystalline Ni-Ti alloys with titanium content greater-than-or-equal-to 40 at.% had almost the same anodic behavior and photoelectrochemical properties in so far as they had the same composition, i.e. they were spontaneously passivated and showed a positive photocurrent. Band-gap energies of the surface film on amorphous and crystalline Ni-Ti alloys were all about 3.3 eV although they were dependent on the applied potential. The thickness of the surface film formed on amorphous and crystalline Ni-40Ti alloys was, in the range of several nanometers, within the potential region examined. It increased with potential. In the surface film Ti4+ ions were concentrated relative to the bulk alloy composition.
引用
收藏
页码：1025 / 1028
页数：4
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