预合金化粉末制备钛基复合材料研究进展

Titanium matrix composites(TMCs) possessed high strength, high specific modulus, excellent wear resistance, and heat resistance, making them widely used as advanced structural materials in aerospace and other fields. Powder metallurgy(PM) and additive manufacturing(AM) were common advanced processing techniques for TMCs, valued for their high degree of material design freedom and material utilization. However, these processes faced challenges in enhancing the mechanical properties of TMCs due to the limitations in distribution, size, and structure of reinforcing phases. Pre-alloyed powders offered novel reinforcing phase structures for TMCs, enabling ceramic particles such as TiC and TiB to be refined to the nanoscale and uniformly distributed, significantly refining the material. Additionally, these powders could be combined with primary powder boundary (PPB) network structures to achieve multiscale distribution of reinforcing phases, opening new avenues for improving the strength and plasticity of TMCs through PM and AM techniques. Based on this background, this review summarized the research progress in the preparation of PM TMCs and AM TMCs using pre-alloyed powders, introduced the preparation processes of pre-alloyed powders, and explored the new structures and performance optimization effects brought by these processes. Finally, this paper summarized the current challenges faced by this technology and provided an outlook on future research directions and development trends.