SURFACE ANALYTICAL INVESTIGATIONS ON THE OXIDATION BEHAVIOR OF TIAL-BASE INTERMETALLICS

被引：45
|
作者：
FIGGE, U [1 ]
ELSCHNER, A [1 ]
ZHENG, N [1 ]
SCHUSTER, H [1 ]
QUADAKKERS, WJ [1 ]
机构：
[1] RES CTR JULICH,INST REACTOR MAT,POB 19 13,W-5170 JULICH,GERMANY
来源：
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1993年 / 346卷 / 1-3期
关键词：
D O I：
10.1007/BF00321386
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The oxidation behaviour of TiAl-base intermetallics has been investigated at 800-degrees-C in air. The main emphasis was placed on the mechanism by which niobium additions decrease the oxidation rate of titanium aluminides. For this purpose specimens of Ti50Al and Ti45Al10Nb were oxidized in a two-stage oxidation technique using an O-18-tracer. The scale formed during this oxidation process was analyzed by SNMS. It was found that niobium is mainly incorporated in the titanium dioxide and the nitride scale which forms beneath the initially formed alumina layer. The effect of this behaviour of the niobium on the oxide scale growth rates is discussed.
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页码：75 / 78
页数：4
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