超高壓力下通電燒結制備鎢鐵功能梯度材料

Fabrication of tungsten/iron functionally graded materials by resistance sintering under ultra-high pressure

摘要: 采用超高壓力下通電燒結技術制備了鎢體積分數為0%、25%、50%、75%和100%的鎢鐵功能梯度材料.研究了材料組分和工藝參數對W/Fe功能梯度材料的顯微形貌及力學性能的影響.結果表明:當施加壓力為9 GPa,通電功率為11 kW,通電時間60 s時可以獲得相對密度大于98%的鎢鐵功能梯度材料,其組分分布與設計成分保持一致.

Abstract: ungsten/iron functionally graded materials(FGM),in which the volume fractions of tungsten are 0%,25%,50%,75% and 100% respectively,were produced by resistance sintering under ultra high pressure.The effects of components and preparation parameters on the microstructure and mechanical properties of W/Fe FGM were analyzed.It is shown that W/Fe FGM,whose relative density reaches more than 98%,can be obtained at a pressure of 9 GPa and an input power of 11 kW for 60s so that the elemental composition distribution is in agreement with the designed.