Behavior of MoxCryTazSi2 Solid Solutions During Cyclic Heating in Air

New oxidation- and heat-resistant materials based on a molybdenum solid solution (Mo x Cr y Ta z Si 2 ) have been tested by high-temperature cyclic heating and cooling in air in the range 300–1600°C. Compact samples of the solid solutions show high heat resistance. The oxidation resistance of the so...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2015-10, Vol.54 (5-6), p.304-308
Main Authors: Kud’, I. V., Pasichnyi, V. V., Ostapenko, S. A., Eremenko, L. I., Likhoded, L. S., Zyatkevich, D. P., Uvarova, I. V.
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Materials Science
Metallic Materials
Natural Materials
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Summary:New oxidation- and heat-resistant materials based on a molybdenum solid solution (Mo x Cr y Ta z Si 2 ) have been tested by high-temperature cyclic heating and cooling in air in the range 300–1600°C. Compact samples of the solid solutions show high heat resistance. The oxidation resistance of the solid solution samples is much higher than that of MoSi 2 in experimental conditions. The oxidation resistance of the solid solution is found to depend on its composition: the oxidation resistance of Mo 0.60 Cr 0.36 Ta 0.04 Si 2 is two times higher and of Mo 0.90 Cr 0.18 Ta 0.02 Si 2 is one order of magnitude higher than that of MoSi 2 . The oxidation resistance increases with Cr content up to 18 mol.%, but higher chromium amounts cause the characteristics to degrade because the strength of the protective surface film decreases. The MoSi 2 solid solutions may be recommended as heat- and oxidationresistant materials for cyclic operation in air at temperatures up to 1600°C.
ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-015-9714-7