Al_2O_3微粉的表面改性及表征  

Surface Modification and Characterization of Al_2O_3 Micropowder

作　　者：于志强[1] 武高辉[1] 孙东立[1] 姜龙涛[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《无机材料学报》2003年第6期1250-1254,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(50071019)

摘　　要：以α-Al_2O_3微粉为基体,Y(NO_3)_3水溶液为包裹相,采用液相包裹法进行加钇颗粒表面改性.获得了表面均匀包裹Y_2O_3的α-Al_2O_3粉体.将此粉体与Al合金复合制备复合材料.复合材料组织更加均匀.对材料进行力学性能测试,结果表明:改性粉体对Al合金增强效果明显增加,抗拉强度提高27.2％;屈服强度提高33.1％,延伸率提高10.3％.alpha-Al(2)O(3)micropowder with the even coating of Y2O3 Was obtained in such an experiment by using alpha-Al2O3 powder as base material and Y(NO3)(3) solution as coating phase through the liquid phase coating method. The aluminium matrix composite reinforced by alpha-Al2O3 particles modified by Y2O3 was fabricated. The microstructure of the composite is more even. The mechanical properties testing indicates that the strengthening effect of the modified-Al2O3 porticles on the Al alloy is improved obviously and the tensile strength of the composites increases by 27.2%, yield strength increases by 33.1%, and the elongation increases by 10.3%.

关 键 词：表面改性 液相颗粒包裹 微粉 AL2O3/AL复合材料 组织性能 

分 类 号：TB331[一般工业技术—材料科学与工程]