TiB-Ti周期序构复合材料设计、制备及性能研究

Design,Fabrication and Properties of Periodic Ordered Structural Composites with TiB-Ti Units

高性能结构材料部件在航空航天、交通汽车、电子信息、冶金等领域具有重要的应用价值,得到了广泛研究。增强结构材料部件整体性能的方法主要包括材料本征性能提升和结构复合设计优化,但提高单一结构材料的本征力学性能的研究已接近极限。本研究旨在提出周期序构结构材料的理念,并采用一体化烧结制备出整体性能更好的结构复合材料,从而探索高性能结构复合材料发展的新范式。通过周期序构化的设计,构建了兼具陶瓷高硬度和金属强韧性的TiB-Ti功能单元,设计制备了不同周期序构模式的TiB-Ti高性能结构复合材料。在此基础上,对这些结构进行了力学性能研究,并通过分析其断裂模式来探究不同序构模式对材料整体性能的影响。结果表明,周期序构化可以通过改变材料宏观断裂模式和应力分散特性来提高材料的整体性能。这一研究新范式对其他结构复合材料的结构设计和性能突破具有指导和借鉴意义。对周期序构模式的复杂化探索,对周期序构结构材料的应用场景探索和其他性能测试研究也将是未来需要重点关注的问题。

High-performance structural material components are widely researched because of their curcial applications in aerospace,transportation and automotive,electronic information,metallurgy,and other fields.Traditional methods for enhancing the overall performance of structural material components mainly include improving intrinsic material properties and optimizing structural composite design.However,research on enhancing the intrinsic mechanical properties of single structural materials is reaching its limits.This study aims to explore a new paradigm for the development of high-performance structural composites by proposing the concept of periodic ordered structural materials and preparing the structural composites with improved overall properties through integrated sintering.The TiB-Ti functional unit with high hardness of ceramics and strong toughness of metal was structured through periodical sequencing,and high-performance TiB-Ti structural composites with different periodical sequencing modes were designed and prepared.On this basis,the mechanical properties of these structures were investigated,and their fracture modes were analyzed to understand how different ordering modes affect the overall properties of the materials.The results show that periodic ordered structure can improve the overall performance of materials by altering their macroscopic fracture modes and stress distribution properties.This new paradigm of research provides valuable insights and guidance for the structural design and performance breakthrough of other structural composites.Future research may focus on the exploration of the complexity of the periodic ordered structure modes,identifying potential application scenarios for these materials,and conducting additional performance testing studies.