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Evolution of Al-containing phases in ODS steel by hot pressing and annealing

Journal Article


Abstract


  • The crystal structures of Al2O3 and Y-Al-O particles in the as-hot pressed (as-hped) and as-heat treated oxide dispersion strengthened (ODS) steel were identified in this paper using high resolution transmission electron microscopy (HRTEM) techniques. The carbon extraction replicas were utilized to investigate the composition and crystal structure of the oxide particles in order to exclude the influence of the matrix. In the as-hped ODS steel, both of the ��-Al2O3 and ��-Al2O3 particles with different size were identified, while, only the large ��-Al2O3 particles were found in the as-heat treated ODS steel. In addition, YAlO3 and Y3Al5O12 with body-centred cubic structure were the mainly observed Y-Al-O particles in the as-hped ODS steel, and large amounts of Y4Al2O9 particles with a monoclinic structure generated in the ODS steel during annealing.

Publication Date


  • 2017

Citation


  • Zhao, Q., Yu, L., Liu, Y., Huang, Y., Guo, Q., Li, H., & Wu, J. (2017). Evolution of Al-containing phases in ODS steel by hot pressing and annealing. Powder Technology, 311, 449-455. doi:10.1016/j.powtec.2017.02.016

Scopus Eid


  • 2-s2.0-85012930216

Start Page


  • 449

End Page


  • 455

Volume


  • 311

Issue


Place Of Publication


Abstract


  • The crystal structures of Al2O3 and Y-Al-O particles in the as-hot pressed (as-hped) and as-heat treated oxide dispersion strengthened (ODS) steel were identified in this paper using high resolution transmission electron microscopy (HRTEM) techniques. The carbon extraction replicas were utilized to investigate the composition and crystal structure of the oxide particles in order to exclude the influence of the matrix. In the as-hped ODS steel, both of the ��-Al2O3 and ��-Al2O3 particles with different size were identified, while, only the large ��-Al2O3 particles were found in the as-heat treated ODS steel. In addition, YAlO3 and Y3Al5O12 with body-centred cubic structure were the mainly observed Y-Al-O particles in the as-hped ODS steel, and large amounts of Y4Al2O9 particles with a monoclinic structure generated in the ODS steel during annealing.

Publication Date


  • 2017

Citation


  • Zhao, Q., Yu, L., Liu, Y., Huang, Y., Guo, Q., Li, H., & Wu, J. (2017). Evolution of Al-containing phases in ODS steel by hot pressing and annealing. Powder Technology, 311, 449-455. doi:10.1016/j.powtec.2017.02.016

Scopus Eid


  • 2-s2.0-85012930216

Start Page


  • 449

End Page


  • 455

Volume


  • 311

Issue


Place Of Publication