[Kovove materialy - Metallic materials]
    Thu - March 28, 2024 - 14:16 No. of hits : 1736405 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 39 (2001), Issue 2

Changes of structure and phase composition of Ni3Al intermetallic compound due to surrounding atmosphere at elevated temperatures (in Czech)
PIZUROVA, N., SCHNEEWEISS, O.
vol. 39 (2001), no. 2, pp. 121 - 131

Abstract
Structural and phase composition of the Ni3Al intermetallic compound samples are investigated using electrical resistance measurement during a long time annealing at 773 °C in argon atmosphere. The initial and final state is studied by SEM, TEM and EDAX. Isothermal measurement of electrical resistance during the annealing indicates two stages of oxide formation. Exchange of the argon atmosphere for the hydrogen one causes a jump of electrical resistance explained by interaction of the oxide with hydrogen. Study of the structure shows that two types of Al2O3 are formed: hexagonal β-Al2O3 and trigonal δ-Al2O3.

Key words
intermetallic compound, Ni3Al, oxidation, electrical resistance, structure, SEM, TEM

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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