新型钴基与 Nb-Si 基高温合金扩散动力学研究进展

Data on diffusion kinetics of superalloys is crucial for gaining a thorough understanding of the mechanisms underlying the phase transition and microstructural evolution of superalloys. Further, it is the basis for the design and development of novel Co and Nb-Si-based superalloys. Herein, the common elements used in preparing superalloys and their corresponding functions are systematically summarized. In addition, the contribution of our research group in the establishment and improvement of databases on multicomponent diffusion kinetics of novel Co and Nb-Si-based superalloys is presented in detail. Furthermore, the machine learning method for self-diffusion coefficient and impurity diffusion coefficient, the experimental method for mutual diffusion coefficients, and the molecular dynamics method for tracer diffusion coefficients in the alloy systems are briefly discussed. In addition to providing a brief introduction of the applications of the databases in the simulation of microstructural evolution and alloy design, an outlook on the development of the databases on diffusion kinetics and related applications is presented.