摘要
采用X射线衍射仪、电子扫描、TEM透射电镜和DTA差热分析等手段,研究了在Ar气氛保护下Cu-Zn-Al2O4粉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的晶格常数和粉体成分、形貌、热稳定性的影响.结果表明:随着球磨时间延长,Cu的晶格常数不断变化,晶粒尺寸可细化至22nm;高能球磨120h后,可获得纳米氧化铝颗粒弥散分布的Cu-Zn复合粉末;Cu-Zn-Al2O4混合粉在700-850℃之间加热时,会出现Al2O4的晶化转变,球磨时间越长,Al2O4晶化转变温度越高,固溶体的熔点温度降低,球磨60h后熔化温度可降为1045℃.
he reaction process between Cu-Zn-Al2O4during ball milling with Ar protection was studied by X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy (TEM) and different thermal analysis(DTA). The composite, the thermal stability, the morphology of powders and the lattice constant of a- Cu after different balling time have been analyzed. The results shows that the lattice parameter of α-Cu(Zn)is increased continually. But after 75 hours ball milling time, the meta γ-phase ...
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第S1期334-339,共6页
Journal of Yunnan University(Natural Sciences Edition)
基金
湖北省自然科学基金资助项目(2001J017)
