Formation mechanisms of Y–Al–O complex oxides in 9Cr-ODS steels with Al addition
- 12 Downloads
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 Y4Al2O9 (YAM), orthorhombic YAlO3 (YAP), cubic Y3Al5O12 (YAG) and Y2O3 nanoparticles are identified. Both YAM and YAG can directly precipitate from the Y2O3 particles. One individual Y2O3 particle will produce several YAM particles, while only one YAG particle can be formed within one Y2O3 particle. The majority of identified Y–Al–O oxides exhibit partially coherent interfaces with the matrix, and multiple orientation relationships are revealed.
The authors are grateful to the China National Funds for Distinguished Young Scientists (Grant No. 51325401), the National Natural Science Foundation of China (Grant Nos. 51474156 and U1660201) and the National Magnetic Confinement Fusion Energy Research Program (Grant No. 2014GB125006) for grant and financial support.
- 1.Zinkle SJ, Boutard JL, Hoelzer DT, Kimura A, Lindau R, Odette GR, Rieth M, Tan L, Tanigawa H (2017) Development of next generation tempered and ODS reduced activation ferritic/martensitic steels for fusion energy applications. Nucl Fusion 57(9):092005. https://doi.org/10.1088/1741-4326/57/9/092005 CrossRefGoogle Scholar
- 14.Kimura A, Kasada R, Iwata N, Kishimoto H, Zhang CH, Isselin J, Dou P, Lee JH, Muthukumar N, Okuda T, Inoue M, Ukai S, Ohnuki S, Fujisawa T, Abe TF (2011) Development of Al added high-Cr ODS steels for fuel cladding of next generation nuclear systems. J Nucl Mater 417(1):176–179CrossRefGoogle Scholar
- 24.Mittemeijer EJ (2010) Fundamentals of materials science: The microstructure–property relationship using metals as model systems. Springer, HeidelbergGoogle Scholar
- 38.Nejman AY, Tkachenko EV, Kvichko LA, Kotok LA (1980) Conditions and macromechanism of solid-phase synthesis of yttrium aluminates. Zhurnal Neorganicheskoj Khimii 25(9):2340–2345Google Scholar