论文部分内容阅读
利用机械合金化方法制备Al-20%Sn-4.5%Cu合金粉末,将之压制成型后进行烧结。用X射线衍射仪(XRD)、扫描电镜(SEM)和差示扫描量热仪(DSC)分析了Al-20%Sn-4.5%Cu合金在高能球磨和烧结过程中的组织变化。结果表明,该合金粉末经40 h球磨后,可以获得纳米级Sn颗粒均匀弥散分布在Al基体上的组织,并且形成了Al(Cu)过饱和固溶体;在随后的烧结过程中,Sn相尺寸仍保持在200 nm左右,Al(Cu)过饱和固溶体则以CuAl相的形式脱溶析出。
The Al-20% Sn-4.5% Cu alloy powder was prepared by a mechanical alloying method, which was press-formed and sintered. The microstructures of Al-20% Sn-4.5% Cu alloy during high-energy ball milling and sintering were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimeter (DSC) The results show that after 40 h ball milling, the nanosized Sn particles can be uniformly dispersed on the Al matrix and the Al (Cu) supersaturated solid solution can be obtained. In the subsequent sintering process, the Sn phase size Maintained at about 200 nm, Al (Cu) supersaturated solid solution is precipitated as CuAl phase precipitation.