J. Mater. Sci. Technol. ›› 2025, Vol. 210: 159-169.DOI: 10.1016/j.jmst.2024.04.084

• Research Article • Previous Articles     Next Articles

High temperature oxidation behavior at 1250 °C: A new multilayer modified silicide coating design strategy on niobium alloys

Shuqi Wanga,b,1,*, Zhiyun Yea,b,1, Yulin Gea,b, Yongchun Zoua,b, Tianlong Zhangc, Xinrui Zhaoa,b, Mengjie Wangd, Ci Songe, Yaming Wanga,b,*, Yu Zhoua,b   

  1. aInstitute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, PR China;
    bKey Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, PR China;
    cDepartment of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China;
    dInstitute of Materials Mechanics, Helmholtz-Zentrum Hereon, Max-Planck-Strasse 121502 Geesthacht, Germany;
    eFaculty of Engineering, Kiel University, Kiel 24143, Germany
  • Received:2023-12-28 Revised:2024-02-12 Accepted:2024-04-15 Online:2024-06-13
  • Contact: *E-mail addresses: wang-shuqi@hit.edu.cn (S. Wang), wangyaming@hit.edu.cn (Y. Wang).
  • About author:1These authors contributed equally to this work.

Abstract: Silicide coatings have proven to be promising for improving the high-temperature oxidation resistance of niobium alloy. However, the long-term protective property of single silicide coating remains a long-time endeavor due to the deficiency of oxygen-consuming phases, as well as the self-healing ability of the protective layer. Herein, a silicide-based composite coating is constructed on niobium alloy by incorporation of nano-SiC particles for enhancing the high-temperature oxidation resistance. Isothermal oxidation results at 1250 °C for 50 h indicate that NbSi2/Nb2O5-SiO2/SiC multilayer coated sample with a low mass gain of 2.49 mg/cm2 shows an improved oxidation resistance compared with NbSi2 coating (6.49 mg/cm2). The enhanced high-temperature antioxidant performance of NbSi2/Nb2O5-SiO2/SiC multilayer coating is mainly attributed to the formation of the protective SiO2 self-healing film and the high-temperature diffusion behavior of NbSi2/substrate.

Key words: Niobium alloys, Silicide-based coating, High-temperature oxidation resistance nano-SiC, Liquid-plasma-assisted particle deposition and sintering