(東北大學(xué)理學(xué)院材料科學(xué)系，沈陽 110006)
摘 要: 通過機(jī)械合金化法制備了Al94V4Fe2合金粉末，該粉末由納米尺寸的fcc-Al相及非晶顆粒組成，兩者的尺寸分別為7 nm和10 nm。應(yīng)用DTA方法檢測合金粉末的熱穩(wěn)定性。合金粉末從非平衡相向平衡相轉(zhuǎn)變經(jīng)歷了兩個(gè)階段。制備具有非晶顆粒和納米fcc-Al相共存結(jié)構(gòu)的合金粉末的最佳工藝條件為40∶1的球料比加72 h球磨。
關(guān)鍵字: 納米相合金 Al-V-Fe合金 納米晶 納米非晶結(jié)構(gòu) 機(jī)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
