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<p>Niobium alloys have excellent high-temperature, high strength, low density, and excellent processability, and is widely used in key components, such as combustion chambers, engine blades, rocket and missile nozzles. However, these niobium alloys have poor oxidation resistance and are easily affected by "pest oxidation" in high-temperature oxidation environments, which greatly limits their application in the aerospace field. This work provides a comprehensive overview of the development and application of niobium alloys, and the microstructure, mechanical properties and oxidation characteristics of three high-temperature niobium alloys (PWC-11, C-103, and Nb521) were discussed. In addition, the microstructure and phase composition evolution, oxidation behavior and failure mechanism behavior of the surface anti-oxidation coatings on high temperature niobium alloys were also investigated. Finally, some suggestions and prospects for improving the mechanical properties and oxidation resistance of high temperature niobium alloys in aerospace applications were proposed.</p>

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The microstructure, mechanical properties and oxidation protection of niobium alloys for aerospace applications

  • 期刊论文

  • 发表日期：

    2025年9月21日

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  • Shuren Zhan,
  • Yingyi Zhang,
  • Jianyue Ji,
  • Haoran He,
  • Jia tian Hu,
  • Tao Fu

摘要

Niobium alloys have excellent high-temperature, high strength, low density, and excellent processability, and is widely used in key components, such as combustion chambers, engine blades, rocket and missile nozzles. However, these niobium alloys have poor oxidation resistance and are easily affected by "pest oxidation" in high-temperature oxidation environments, which greatly limits their application in the aerospace field. This work provides a comprehensive overview of the development and application of niobium alloys, and the microstructure, mechanical properties and oxidation characteristics of three high-temperature niobium alloys (PWC-11, C-103, and Nb521) were discussed. In addition, the microstructure and phase composition evolution, oxidation behavior and failure mechanism behavior of the surface anti-oxidation coatings on high temperature niobium alloys were also investigated. Finally, some suggestions and prospects for improving the mechanical properties and oxidation resistance of high temperature niobium alloys in aerospace applications were proposed.