高能球磨纳米CeO_2/Zn复合粉末的热压烧结  

Hot-press Sintering of CeO_2/Zn Nanocomposite Powders Prepared by High-energy Ball Milling

作　　者：常华[1] 骆心怡[1] 李顺林[1] 杨文涛[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《材料工程》2006年第7期35-38,42,共5页Journal of Materials Engineering

基　　金：江苏省高技术项目资助(BG2001026)

摘　　要：采用真空热压工艺制备了纳米CeO2/Zn复合材料块体,并用正交实验法研究了热压工艺参数对复合材料块体相对密度的影响。结果表明:随着粉末球磨时间的增加,复合材料块体内纳米颗粒分散越均匀,基体晶粒不断细化;块体的相对密度随着热压温度、压力的提高和保温时间的延长而增加,其中热压温度的影响最大,压力影响次之,保温时间影响最小;制得的纳米复合材料块体可加入到热浸镀锌液中。The nanocomposite bulks of CeO2/Zn were prepared by vacuum hot-press sintering of asmilled powders under vacuum. The effects of three factors, namely sintering temperature, pressure and holding time were evaluated by L9（34 ） orthogonal design. The results indicated that with the extension of ball-milling time, the CeO2 nanoparticles were dispersed more homogenous in the bulks and the size of matrix grain decreased continuously. The relative density of the bulks increased with the increment of the sintering temp.erature, pressure and holding time. Among the three factors, sintering temperature played the most important role, and the holding time had the weakest effect. The as-fabricated nanocomposite bulks could be added successfully into hot-dip galvanizing bath.

关 键 词：热压烧结 纳米复合材料 正交实验法 高能球磨 氧化铈/锌粉末 

分 类 号：TB331[一般工业技术—材料科学与工程]