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Ni–Fe–Mo alloys exhibit high-temperatureTemperature strengthStrength, creep resistance, and corrosionCorrosion resistance, making them essential for aerospace turbine blades and chemical reactors. This study examines the thermodynamicThermodynamic behavior of synthesizing Ni–Fe–Mo alloys via molten saltMolten salt electro-deoxidation using Fe2O3, NiO, and MoO3 at 500–1000 ℃. Thermodynamic analysisThermodynamic analysis shows MoO3 initially decomposes into MoO2, with some MoO3 reacting with Ca2+ to form CaMoO4. Simultaneously, Fe2O3 partially decomposes into Fe3O4 and reacts with Ca2+ to form CaFe2O4, requiring strong reductionReduction conditions for further decomposition. CaMoO4 decomposes before CaFe2O4 due to lower thermal stability. Under an applied electric field, NiO is reduced to Ni, followed by the stepwise reductionReduction of Fe2O3 to Fe, while MoO2 to Mo is delayed by a larger driving force. Finally, Ni, Fe, and Mo are sequentially reduced and diffuse in the melt to form a uniform Ni–Fe–Mo alloy.

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Thermodynamic Behavior and Sequential Reduction Mechanism in the Synthesis of Ni–Fe–Mo Alloys via Molten Salt Electro-Deoxidation

  • 会议论文

  • 发表日期：

    2026年

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  • Bangmeng Qu,
  • Jinglong Liang

摘要

Ni–Fe–Mo alloys exhibit high-temperatureTemperature strengthStrength, creep resistance, and corrosionCorrosion resistance, making them essential for aerospace turbine blades and chemical reactors. This study examines the thermodynamicThermodynamic behavior of synthesizing Ni–Fe–Mo alloys via molten saltMolten salt electro-deoxidation using Fe2O3, NiO, and MoO3 at 500–1000 ℃. Thermodynamic analysisThermodynamic analysis shows MoO3 initially decomposes into MoO2, with some MoO3 reacting with Ca2+ to form CaMoO4. Simultaneously, Fe2O3 partially decomposes into Fe3O4 and reacts with Ca2+ to form CaFe2O4, requiring strong reductionReduction conditions for further decomposition. CaMoO4 decomposes before CaFe2O4 due to lower thermal stability. Under an applied electric field, NiO is reduced to Ni, followed by the stepwise reductionReduction of Fe2O3 to Fe, while MoO2 to Mo is delayed by a larger driving force. Finally, Ni, Fe, and Mo are sequentially reduced and diffuse in the melt to form a uniform Ni–Fe–Mo alloy.