核壳结构多相掺杂钨纳米粉体的制备与材料辐照损伤行为研究

As plasma facing materials (PFMs) for future engineering applications, Tungsten exist several problems to be solved, i.e., difficulties to densify, brittleness and irradiation damage. The project plans to carry out basic researches related to preparation of tungsten-based materials and performance optimization. The project intends to prepare multiphase doped tungsten nano composite powders with core-shell structure by wet chemical route, and obtain high density multiphase doped tungsten composites using rapid sintering technology to improving comprehensive property and relieve irradiation damage. Systematic study on preparation processes and composition design of multiphase doped tungsten nano composite powders by wet chemical route, sintering mechanism and performance characteristics of multiphase doped tungsten-based materials, influence of doping phases and process on mechanical properties, DBTT, recrystallization temperature, and irradiation resistance. Expect a breakthrough in the scientific problems of sintering mechanism of multiphase doped tungsten nano powders with core-shell structure and irradiation damage mechanism of multiphase doped tungsten-based materials, to provide new ideas and theoretical references for modification and relieving irradiation damage of tungsten-based materials.

针对钨材料作为将来工程化应用的面向等离子体材料，所面临的烧结致密化困难、脆性和辐照损伤等问题，开展钨基材料制备与性能优化等相关基础研究。本项目拟通过液相法制备核壳结构多相掺杂钨纳米先驱粉，采用快速烧结技术获得高致密纳米多相掺杂钨材料，进而改善材料烧结特性和缓解辐照损伤。系统开展液相法多相掺杂钨纳米复合粉体制备工艺控制及组成设计研究，多相掺杂钨基材料烧结机理及性能特性研究，掺杂相及相关因素对钨基材料力学性能、DBTT、再结晶温度和辐照损伤行为等影响规律研究。期望在核壳结构多相掺杂钨纳米粉的烧结机制和辐照条件下液相法多相掺杂钨基材料结构与性能的演变及其机制等科学问题研究上有所突破，为改性钨基材料与缓解辐照损伤提供技术思路和理论参考。

针对钨材料作为将来工程化应用的面向等离子体材料，所面临的烧结致密化困难、脆性和辐照损伤等问题，本项目开展了钨基材料制备与性能优化等相关基础研究。本项目采用液相法制备了核壳结构多相掺杂钨纳米先驱粉，采用快速烧结技术等获得了高致密纳米多相掺杂钨材料，进而改善了材料烧结特性和缓解辐照损伤。系统开展了液相法多相掺杂钨纳米复合粉体制备工艺控制及组成设计研究，多相掺杂钨基材料烧结机理及性能特性研究。