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Formation mechanisms of Y–Al–O complex oxides in 9Cr-ODS steels with Al addition

Journal Article


Abstract


  • For the Al-alloyed 9Cr-ODS steels consolidated by spark plasma sintering and annealed at 800 °C, the Y–Al–O oxides, interface structure and orientation relationships between the oxides and the matrix are studied by high-resolution transmission electron microscope technique. It is found that the spark plasma sintering can serve as a useful and effective tool to investigate the transition states in complex oxide formation. Monoclinic Y 4 Al 2 O 9 (YAM), orthorhombic YAlO 3 (YAP), cubic Y 3 Al 5 O 12 (YAG) and Y 2 O 3 nanoparticles are identified. Both YAM and YAG can directly precipitate from the Y 2 O 3 particles. One individual Y 2 O 3 particle will produce several YAM particles, while only one YAG particle can be formed within one Y 2 O 3 particle. The majority of identified Y–Al–O oxides exhibit partially coherent interfaces with the matrix, and multiple orientation relationships are revealed.

Publication Date


  • 2019

Citation


  • Zhou, X., Ma, Z., Yu, L., Huang, Y., Li, H., & Liu, Y. (2019). Formation mechanisms of Y–Al–O complex oxides in 9Cr-ODS steels with Al addition. Journal of Materials Science, 54(10), 7893-7907. doi:10.1007/s10853-018-03293-8

Scopus Eid


  • 2-s2.0-85061175337

Web Of Science Accession Number


Start Page


  • 7893

End Page


  • 7907

Volume


  • 54

Issue


  • 10

Abstract


  • For the Al-alloyed 9Cr-ODS steels consolidated by spark plasma sintering and annealed at 800 °C, the Y–Al–O oxides, interface structure and orientation relationships between the oxides and the matrix are studied by high-resolution transmission electron microscope technique. It is found that the spark plasma sintering can serve as a useful and effective tool to investigate the transition states in complex oxide formation. Monoclinic Y 4 Al 2 O 9 (YAM), orthorhombic YAlO 3 (YAP), cubic Y 3 Al 5 O 12 (YAG) and Y 2 O 3 nanoparticles are identified. Both YAM and YAG can directly precipitate from the Y 2 O 3 particles. One individual Y 2 O 3 particle will produce several YAM particles, while only one YAG particle can be formed within one Y 2 O 3 particle. The majority of identified Y–Al–O oxides exhibit partially coherent interfaces with the matrix, and multiple orientation relationships are revealed.

Publication Date


  • 2019

Citation


  • Zhou, X., Ma, Z., Yu, L., Huang, Y., Li, H., & Liu, Y. (2019). Formation mechanisms of Y–Al–O complex oxides in 9Cr-ODS steels with Al addition. Journal of Materials Science, 54(10), 7893-7907. doi:10.1007/s10853-018-03293-8

Scopus Eid


  • 2-s2.0-85061175337

Web Of Science Accession Number


Start Page


  • 7893

End Page


  • 7907

Volume


  • 54

Issue


  • 10