Mechanism of silicon distribution and oxide morphology in the internal oxidation zone of grain-oriented silicon steel during decarburization
Source abstract
Abstract
Grain-oriented silicon steel is decarburized in N 2-H 2-H 2 O at 835 ℃ for different time. The oxide is spherical, spherical-lamellar and lamellar from outside to inside, and lamellar oxide would gradually degenerate to spheroid as oxidation front moves inward. Concentration-depth profiles for silicon exhibit damping-like oscillations. Wagner’s model is extended to illustrate the intrinsic mechanism by introducing the hypothesis of flux imbalance at oxidation front with finite thickness. Based on the extended model, the dissolved oxygen concentration at steel surface is lower at initial decarburization, and the damping-like oscillations of concentration profile for silicon follow from cyclic change in oxidation front velocity.
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Research context
OpenAlex topics: Magnetic Properties and Applications · Metallurgical Processes and Thermodynamics · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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