Presence of Oxygen in Ti-Al-C MAX Phases-Based Materials and their Stability in Oxidizing Environment at Elevated Temperatures

Presence of Oxygen in Ti-Al-C MAX Phases-Based Materials and their Stability in Oxidizing Environment at Elevated Temperatures

The Ti3AlC2-, (Ti,Nb)3AlC2- and Ti2AlC-based materials turned out to be more resistant than Crofer JDAsteel in oxidizing atmosphere as 1000 h long tests at 600◦C have shown. But the amounts of oxygen absorbed bythe materials during testing were different. The Ti2AlC-based material demonstrated the l...

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Bibliographic Details
Published in:Acta physica Polonica, A Vol. 133; no. 4; pp. 789 - 793
Main Authors: Prikhna, T., Ostash, O., Sverdun, V., Karpets, M., Zimych, T., Ivasyshin, A., Cabioc'h, T., Chartier, P., Dub, S., Javorska, L., Podgurska, V., Figel, P., Cyboroń, J., Moshchil, V., Kovylaev, V., Ponomaryov, S., Romaka, V., Serbenyuk, T., Starostina, A.
Format: Journal Article
Language:English
Published: Polish Academy of Sciences. Institute of Physics 01-04-2018
Subjects:
Acoustics
Automatic
Biomechanics
Chemical Sciences
Electric power
Electromagnetism
Engineering Sciences
Fluid mechanics
Material chemistry
Materials and structures in mechanics
Mathematical Physics
Mechanics
Physics
Polymers
Quantum Physics
Reactive fluid environment
Thermics
Vibrations
bending strength
Hot pressing
High-Temperature resistance in air and hydrogen
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Summary:The Ti3AlC2-, (Ti,Nb)3AlC2- and Ti2AlC-based materials turned out to be more resistant than Crofer JDAsteel in oxidizing atmosphere as 1000 h long tests at 600◦C have shown. But the amounts of oxygen absorbed bythe materials during testing were different. The Ti2AlC-based material demonstrated the lowest oxygen uptake,(Ti,Nb)3AlC2-based absorbed a somewhat higher amount and the highest amount was absorbed by Ti3AlC2-basedmaterial. Scanning electron microscopy and the Auger study witnessed that amounts of oxygen in the MAXphases before the exposure in air were as well different: the approximate stoichiometries of the matrix phases ofmaterials were Ti3.1−3.2AlC2−2.2, Ti1.9−4Nb0.06−0.1AlC1.6−2.2O0.1−1.2and Ti2.3−3.6AlC1−1.9O0.2−0.6, respectively.The higher amount of oxygen present in the MAX phase structures may be the reason for higher resistanceto oxidation during long-term heating in air at elevated temperature. The studied materials demonstrated highstabilities in hydrogen atmosphere as well. The bending strength of the Ti3AlC2- and (Ti,Nb)3AlC2-based materialsafter keeping at 600◦C in air and hydrogen increased by 10–15%, but the highest absolute value of bending strengthbefore and after being kept in air and hydrogen demonstrated the Ti2AlC-based material (about 590 MPa).
ISSN:0587-4246
1898-794X
DOI:10.12693/APhysPolA.133.789