纳米CeO_2/Zn复合粉末的高能球磨法制备与表征

Preparation and Characterizations of CeO_2/Zn Nanocomposite Powder by High-Energy Ball Milling

采用高能球磨法制备了用于热浸镀锌的纳米C eO2/Zn复合粉末,并利用X射线衍射(X-ray d iffraction,XRD)、X射线光电子能谱(X-ray photoe lectron spectroscopy,XPS)、透射电镜(T ransm iss ion e lectron m i-croscopy,TEM)、扫描电镜(Scann ing e lectron m icroscopy,SEM)以及能谱分析(X-ray energy d ispers ive spec-trum,EDS)等方法,对复合粉末的显微结构、表面成分、晶粒大小、微观形貌以及元素分布进行了研究。结果表明,随着球磨时间的延长,纳米C eO2硬团聚体逐渐解聚,Zn晶粒不断细化,形成层片状复合粉末;球磨120 m in后纳米C eO2粒子分散良好,呈理想的单个均匀弥散分布状态包覆在Zn颗粒上形成近似球形的复合粒子,其粒径分布均匀。

The CeO2/Zn nanocomposite powder applied to hot-dip galvanizing is prepared by high-energy ball milling. The microstructure, the surface composition, the grain size, the morphology, and the elemental distribution of the powder are investigated by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, transmission electron microscopy （TEM）, and scanning electron microscopy （SEM） with an X-ray energy dispersive spectrum （EDS）. Results show that with the increasing of ballmilling time, agglomerative CeO2 nanoparticles are gradually disintegrated, and the grain size of Zn powders is decreased. After milling for 120 min, CeO2 nanoparticles are homogeneously distributed on the surface of fine Zn particles to form spherical-like nanocomposite powders with a narrow grain size distribution.