Diffusion behavior of oxygen in FGH96 superalloys during consolidation process
Source abstract
Abstract
Understanding the transformation behavior of the oxide layer on FGH96 powders during sintering should be in terms of oxides formation, decomposition and the diffusion of oxygen. This study investigates the early sintering stages of FGH96 superalloys, revealing the transformation of amorphous oxide layer into stable (Al 2O 3, ZrO 2) and unstable (NiO, CoO, Cr 2O 3, TiO 2) crystalline particles. Oxygen ions, generated by the decomposition of unstable oxides, preferentially integrate into γ matrix due to lower formation energy, overshadowing γ′ phase diffusion. The low propensity for internal oxidation, attributed to high energy barriers and oxygen partial pressure, leads to oxygen dissolution in the matrix.
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Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · High Temperature Alloys and Creep · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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