添加Nd_2O_3对高铝瓷的耐磨性及结构影响  

Effects of Nd_2O_3 Addition on Wear Resistance and Microstructure of Alumina Ceramics

作　　者：毕四龙 吴伯麟[1,2] 

机构地区：[1]有色金属材料及其加工新技术教育部重点实验室,广西桂林541004 [2]桂林理工大学材料科学与工程学院,广西桂林541004

出　　处：《陶瓷》2014年第4期27-31,共5页Ceramics

基　　金：中国国家自然科学基金(编号:51172049);"973"计划前期项目(编号:2012CB722804)

摘　　要：实验以工业氧化铝为主要原料,对Al2O3含量为98%的氧化铝陶瓷进行研究。实验主要过程为:在Ca-MgAl-Si-O体系中添加不同量的稀土氧化物Nd2O3,并在不同温度下烧结,利用X射线粉末衍射(XRD)以及场发射扫描电镜(SEM)对所得复合陶瓷的显微结构和物相组成进行分析,并且测试其吸水率和磨损率。结果表明:Nd2O3掺入使陶瓷晶粒均匀化,并且少量Nd3+可以促进片状晶体的形成,从而使得磨损率获得大幅度的降低。The main material of the experiment is industrial alumina. The experimental subject is alumina ceramics which contain 98 percents of Al2O3. The main experimental processes are as follows. Firstly,add different amounts of rare earth oxide Nd2O3 in the Ca-Mg-Al-Si-O system and sinter at different temperatures. Secondly, analyze the microstructure of composite ceramics and object composition using the X-ray powder diffraction （XRD） and field emission scanning elec- tron microscopy （SEM）. At the same time, test its water absorption rate and wear rate. The results shows that adding Nd2O3 makes the grain homogenize and a small amount of Nd3＋ can promote the formation of crystal plate,so as to lower the wear rate by a wide margin.

关 键 词：AL2O3 陶瓷 磨损率 显微结构 ND2O3 

分 类 号：TQ174.758[化学工程—陶瓷工业]