摘要
采用X射线衍射仪、电子扫描电镜和透射电镜等研究了Ar气氛保护下Cu-Zn-Al_2O_2复合粉末在高能球磨过程中发生的机械合金化反应,分析了不同球磨时间对α-Cu(Zn)的晶格常数、晶粒尺寸以及复合粉末粉体形貌、颗粒尺寸的影响。结果表明,球磨初期,Cu的晶格常数增大,但75h后由于γ相的析出,α-Cu(Zn)晶格常数减小;高能球磨120h后,可获得氧化铝颗粒弥散分布的纳米级Cu(Zn)复合粉末。
The mechanical alloying process of Cu-Zn-Al2O3 composite powders during ball milling under the protection of argon gas is studied by XRD, SEM and TEM. The lattice constant and grain size of α-Cu, and the morphologies and particle size of the powders at different bailing time are analyzed. The results indicate that the lattice parameter of α-Cu（Zn） increases continually during ball milling, while it decreases after 75h, due to the precipitation of γ-phase, and its grain size decreases. Cu-Zn-Al2O3 composite powders with size of 10-60nm are prepared after milling for 120h.
基金
湖北省自然科学基金(2007ABA406)
湖北省教育厅科学研究基金(B200623003)
