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Article: High-temperature oxidation behavior of TiAl-based alloys fabricated by spark plasma sintering
Title | High-temperature oxidation behavior of TiAl-based alloys fabricated by spark plasma sintering |
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Authors | |
Keywords | Spark plasma sintering (SPS) TiAl alloys Oxide scales High-temperature oxidation |
Issue Date | 2009 |
Citation | Journal of Alloys and Compounds, 2009, v. 478, n. 1-2, p. 220-225 How to Cite? |
Abstract | Alloys of Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y and Ti-47.5Al-2.0V-1.0Cr have been prepared by spark plasma sintering (SPS). Their high-temperature oxidation behavior at 1000 °C in air has been investigated. The results indicate that the Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y alloy possesses superior oxidation resistance, which is greatly better than that of Ti-47.5Al-2.0V-1.0Cr alloy under the same condition. The enhanced property is mainly attributable to 8.5 at.% Nb addition. For the Ti-47.5Al-2.5V-1.0Cr alloy, the outer oxide scale is dominated by TiO2with a small amount of Al2O3, and the inner scale consists of many separate alternating Al2O3/TiO2layers. By comparison, the inner oxide scale of Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y underneath the outer TiO2-rich layer is composed of TiO2and a minor amount of TiN. Additionally, Nb is found to be enriched at the interface of the oxide scale and the substrate. The addition of Nb promotes the formation of TiN in the oxide scale and Nb-enriched diffusion layer between the scale and the substrate, which is effective to impede the diffusion of Ti and O ions. © 2008 Elsevier B.V. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/262929 |
ISSN | 2023 Impact Factor: 5.8 2023 SCImago Journal Rankings: 1.103 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Lu, X. | - |
dc.contributor.author | He, X. B. | - |
dc.contributor.author | Zhang, B. | - |
dc.contributor.author | Qu, X. H. | - |
dc.contributor.author | Zhang, L. | - |
dc.contributor.author | Guo, Z. X. | - |
dc.contributor.author | Tian, J. J. | - |
dc.date.accessioned | 2018-10-08T09:28:50Z | - |
dc.date.available | 2018-10-08T09:28:50Z | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Journal of Alloys and Compounds, 2009, v. 478, n. 1-2, p. 220-225 | - |
dc.identifier.issn | 0925-8388 | - |
dc.identifier.uri | http://hdl.handle.net/10722/262929 | - |
dc.description.abstract | Alloys of Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y and Ti-47.5Al-2.0V-1.0Cr have been prepared by spark plasma sintering (SPS). Their high-temperature oxidation behavior at 1000 °C in air has been investigated. The results indicate that the Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y alloy possesses superior oxidation resistance, which is greatly better than that of Ti-47.5Al-2.0V-1.0Cr alloy under the same condition. The enhanced property is mainly attributable to 8.5 at.% Nb addition. For the Ti-47.5Al-2.5V-1.0Cr alloy, the outer oxide scale is dominated by TiO2with a small amount of Al2O3, and the inner scale consists of many separate alternating Al2O3/TiO2layers. By comparison, the inner oxide scale of Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y underneath the outer TiO2-rich layer is composed of TiO2and a minor amount of TiN. Additionally, Nb is found to be enriched at the interface of the oxide scale and the substrate. The addition of Nb promotes the formation of TiN in the oxide scale and Nb-enriched diffusion layer between the scale and the substrate, which is effective to impede the diffusion of Ti and O ions. © 2008 Elsevier B.V. All rights reserved. | - |
dc.language | eng | - |
dc.relation.ispartof | Journal of Alloys and Compounds | - |
dc.subject | Spark plasma sintering (SPS) | - |
dc.subject | TiAl alloys | - |
dc.subject | Oxide scales | - |
dc.subject | High-temperature oxidation | - |
dc.title | High-temperature oxidation behavior of TiAl-based alloys fabricated by spark plasma sintering | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.jallcom.2008.11.134 | - |
dc.identifier.scopus | eid_2-s2.0-67349142613 | - |
dc.identifier.volume | 478 | - |
dc.identifier.issue | 1-2 | - |
dc.identifier.spage | 220 | - |
dc.identifier.epage | 225 | - |
dc.identifier.isi | WOS:000266786400051 | - |
dc.identifier.issnl | 0925-8388 | - |