一种纳米相分离烧结制备钨材料的方法，通过高能球磨制备出具有纳米晶晶粒结构和过饱和固溶体特征的机械合金化粉末，然后采用无压烧结和无包套热等静压工艺致密化，得到钨基复合材料。在烧结过程中纳米晶粒过饱和固溶体粉末发生相分离，纳米析出相优先在纳米晶颈部和粉末颗粒表面析出，形成快速迁移通道，促进烧结致密化，降低烧结温度。随着烧结温度的升高，纳米析出相向钨基体中扩散，留下晶界元素富集区。综合利用晶界元素偏聚区和二次相能够更有效的抑制晶粒长大。本发明烧结过程为固相烧结，烧结温度低，避免第二相在高温烧结过程中明显长大，适合制备大尺寸细晶钨基材料，制备出的钨基材料接近全致密、组织结构均匀、综合力学性能优异。

A method for preparing tungsten materials by nanophase separation and sintering. High-energy ball milling is used to prepare mechanically alloyed powder with nanocrystalline grain structure and supersaturated solid solution characteristics, and then adopt pressureless sintering and non-envelope hot isostatic pressing process to densify , To obtain a tungsten-based composite material. During the sintering process, the supersaturated nano-crystalline solid solution powder undergoes phase separation, and the nano-precipitated phase preferentially precipitates on the nanocrystalline neck and the surface of the powder particles to form a rapid migration channel, promote sintering densification, and lower the sintering temperature. With the increase of the sintering temperature, the nano-precipitation phase diffuses into the tungsten matrix, leaving an enriched area of grain boundary elements. The comprehensive utilization of the grain boundary element segregation zone and the secondary phase can more effectively inhibit the growth of crystal grains. The sintering process of the invention is solid-phase sintering, the sintering temperature is low, and the second phase is prevented from growing significantly in the high-temperature sintering process, and is suitable for preparing large-size fine-grained tungsten-based materials. The prepared tungsten-based materials are close to full density, uniform structure, and Excellent comprehensive mechanical properties.