THERMAL STUDIES ON HIGH-TEMPERATURE OXIDATION BEHAVIOR OF NICKEL CONTAINING AB5-TYPE INTERMETALLICS

被引：8
|
作者：
CHRISTOPHER, J
KUMAR, MPS
SWAMY, CS
机构：
[1] Department of Chemistry, Indian Institute of Technology, Madras
来源：
THERMOCHIMICA ACTA | 1990年 / 161卷 / 02期
关键词：
D O I：
10.1016/0040-6031(90)80302-F
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The oxidation behaviour of nickel containing AB5 type intermetallic compounds LaNi5 and CaNi5 has been studied in an oxygen atmosphere by thermogravimetric (TG) and differential thermal analysis (DTA). The TG of LaNi5 showed complete oxidation of lanthanum and nickel whereas that of CaNi5 showed partial oxidation. The DTA curve of LaNi5 showed four irreversible peaks, which have been attributed to the formation of La2O3, NiO and ternary oxides. However, the DTA pattern of CaNi5 did not show any maxima, indicating slow oxidation of CaNi5. The difference in the oxidation behaviour has been explained on the basis of the formation of ternary oxides and the heat of reaction. © 1990.
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页码：207 / 215
页数：9
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