J. Mater. Sci. Technol. ›› 2023, Vol. 149: 127-153.DOI: 10.1016/j.jmst.2022.11.022

• Invited Review • Previous Articles     Next Articles

Progress in Nb-Si ultra-high temperature structural materials: A review

Wei Liua, Shuai Huanga, Chengtong Yeb, Lina Jiab, Yongwang Kangc, Jiangbo Shab, Bingqing Chena, Yu Wua, Huaping Xionga,*   

  1. a3D Printing Research and Engineering Technology Center, Beijing Institute of Aeronautical Materials, Beijing 100095, China;
    bSchool of Materials Science and Engineering, Beihang University, Beijing 100191, China;
    cScience and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China
  • Received:2022-07-29 Revised:2022-10-17 Accepted:2022-11-02 Published:2023-06-20 Online:2023-01-07
  • Contact: *E-mail addresses: xionghuaping69@163.com , xionghuaping69@sina.cn (H. Xiong) .

Abstract: Nb-Si based alloys have the greatest potential to replace nickel-based superalloys and become a new generation ultra-high temperature structural material with service temperature of 1200-1400 °C due to their high melting point, high stiffness, low density, and attractive specific mechanical properties at elevated temperatures. This article reviewed the recent progress in the development of Nb-Si based refractory alloys. Special attention was paid to the property characteristics, preparation techniques, alloying effects, oxidation resistance and fabrication of Nb-Si based alloy components. Thereafter, the trend of development in the future was forecasted, including: Optimization of the composition and microstructure of Nb-Si based alloys to achieve a balance of mechanical properties; Comprehensive properties evaluation for Nb-Si based alloys to accumulate sufficient data for engineering applications; Development of practical preparation technology for Nb-Si based alloy components with complex shapes; New multilayer composite coatings for Nb-Si based alloy; Joining technology of Nb-Si alloy to itself and to superalloy.

Key words: Nb-Si based alloys, Alloying, Mechanical property, Fracture toughness, Oxidation behavior, Coating