臺灣博碩士論文加值系統

摘要元素鋁粉與銅粉組成分別為 Al-1.74%(4wt.%)， 32， 50 與 66
at.% Cu 以 Spex 8000震動球磨機進行機械合金處裡，使用之鋼珠與粉末
重量比為 10:1。 利用 X-ray 繞射分析與 DSC 熱分析來探討機械合金製
程，並以 SEM 與 TEM 來研究其微觀組織。其結果顯 示， 組成為 Al-4
wt.% Cu歐粉末經機械合金處理 3 小時， 銅在鋁中形成固溶體。 組成為
Al-32at.% Cu 混合元素粉末經機械合金處理 3 小時生成中間相 Al2Cu
與 Al4Cu9， 經由退火處理則可得到較多之 Al2Cu 相。另外 Al4Cu9 中
間相可直接由機械合金法合成。 至於 AlCu 中間相則無法可直接由機械
合金法合成，必須以退火處理組成為Al-50at.% Cu之機械合金粉末，才可
轉變為 AlCu 中間相。

ABSTRACT Elemental aluminum and powders with compositions of
Al-1.74(4 wt.%), 32, 50 and at.% Cu, repectively, were
mechanically alloyed in a Spex 8000 mixer mill using a ball-to-
powder weight ratio of 10:1. The alloying process has been
investigated by X-ray diffraction and differential scanning
calorimetry, and the microstructure has been characterized by
scanning and transmission electronmicroscopy. A solid solution
of Cu in Al was formed in the composition of Al-4 wt.% Cu
after 3 h of mechanical alloying process. Mechanical alloying of
blended elemental Al-32 at.% Cu powders resulted in the
formation of Al2Cu phaseand Al4Cu9 phase after 3 h of process.
Annealing of the as-milled powders increased the relative amount
of the Al2Cu phase over the Al4Cu9 phase. The Al4Cu9
intermediate phase could be directly synthesized using
mechanical alloying. As for the AlCu phase, it could not be
obtained directly from the mechanical alloying process.
Annealing treatment on the as-milled Al50Cu50 powders is
required to transform them into the AlCu phase.