(东北大学理学院材料科学系,沈阳 110006)
摘 要: 通过机械合金化法制备了Al94V4Fe2合金粉末,该粉末由纳米尺寸的fcc-Al相及非晶颗粒组成,两者的尺寸分别为7 nm和10 nm。应用DTA方法检测合金粉末的热稳定性。合金粉末从非平衡相向平衡相转变经历了两个阶段。制备具有非晶颗粒和纳米fcc-Al相共存结构的合金粉末的最佳工艺条件为40∶1的球料比加72 h球磨。
关键字: 纳米相合金 Al-V-Fe合金 纳米晶 纳米非晶结构 机械合金化
(Department of Materials Science, College of Science, Northeastern University, Shenyang 110006, P. R. China)
Abstract:Alloy powder consisting of nanoscale amorphous particles plus fcc-Al phase has been prepared in Al94V4Fe2 by mechanically alloying, the sizes of amorphous and fcc-Al phase particles are about 10nm and 7nm, respectively. The thermal stability of the nanoscale amorphous particles in coexistence with the Al phase was examined by DTA. The phase transition of that non-equilibrium phase transiting into equilibrium mixture appears to take place through two stages, i.e. fcc-Al+amorphous→fcc-Al+quasicrystal+X phase→fcc-Al+Al11V+X' phase. The best processing parameter for achieving amorphous and nanoscale fcc-Al phase mixed powders are 40∶1 ball-to-powder mass ratio plus 72h milling.
Key words: nanophase alloy; aluminum; vanadium-iron alloy; nanocrystal; nanoamorphous structure; mechanically alloying