面向高温结构的梯度钨/钢多层性能研究

Graded and Laminar structure are significant measures to intensify high temperature thermal loaded component. Based on the dual regulation mechanism of the graded layer on top surface tungsten and thermal loaded components’ performance, this project puts forward to deepen the research on single graded layer’s properties and the graded multilayer’s performance, as well as the research on surface failure resistance is carried out. Combining experiments and theory, the influence law of material allocation, compounds’ properties and graded configuration on tungsten based thermal loaded components are revealed. The thermal-mechanical-electric multi-parameters characterization method and efficient & precise construction method are explored. This research is helpful for providing the index/parameter/criterion for designing and material selection of tungsten based thermal loaded component for nuclear application, meanwhile, for providing the reference for research on other thermal loaded graded component.

梯度化层状化是高温热结构强化加固的重要措施。本课题基于梯度层对钨质热结构的表面性能和体性能的双重调控机理，提出深化开展梯度单层性质研究，并以此开展梯度多层性能和抗表面失效研究，通过实验与理论相结合，揭示材料组元匹配、复合物性、梯度构型对钨质热结构的影响规律，探索热力电多参数表征及高效精准构造方法，为核用钨质热结构设计、材料选型提供指标参数依据，同时为其他梯度热结构研究提供参考。

多层多维梯度化是高温/超高温热防护和热管理的关键科学问题。本课题基于梯度层对钨质抗烧蚀热结构的表面性能和体性能的双重调控机理，创新性地开展梯度单层性质研究，揭示了核壳微结构非局域化应变调控新机制，为大幅提高传统多层梯度材料性能及研制新型梯度多层材料提供新思路和新技术。通过开展梯度多层性能和抗表面失效关联研究，实现了实验与数值模拟结果相吻合，揭示了梯度多层材料宏微观结构及性能对热结构的影响规律，为核用钨质氦冷抗烧蚀热结构设计及材料选型提供了关键的指标参数依据。同时探索多维梯度的热机械性能，提供了飞行动力热烧蚀结构的研究新范式。